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390 lines
11 KiB
390 lines
11 KiB
/*
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* Copyright (C) 2000 Alex Zepeda <zipzippy@sonic.net>
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* Copyright (C) 2001 George Staikos <staikos@kde.org>
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* Copyright (C) 2001 Dawit Alemayehu <adawit@kde.org>
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*
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* This file is part of the KDE project
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library 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 GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public License
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* along with this library; see the file COPYING.LIB. If not, write to
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* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
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* Boston, MA 02110-1301, USA.
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*/
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#ifndef _TCP_SLAVEBASE_H
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#define _TCP_SLAVEBASE_H
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#include <sys/types.h>
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#include <stdio.h>
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#include <kextsock.h>
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#include <tdeio/slavebase.h>
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namespace TDEIO {
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/**
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* There are two classes that specifies the protocol between application (job)
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* and tdeioslave. SlaveInterface is the class to use on the application end,
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* SlaveBase is the one to use on the slave end.
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*
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* Slave implementations should simply inherit SlaveBase
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*
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* A call to foo() results in a call to slotFoo() on the other end.
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*/
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class TDEIO_EXPORT TCPSlaveBase : public SlaveBase
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{
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public:
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TCPSlaveBase(unsigned short int defaultPort, const TQCString &protocol,
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const TQCString &poolSocket, const TQCString &appSocket);
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TCPSlaveBase(unsigned short int defaultPort, const TQCString &protocol,
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const TQCString &poolSocket, const TQCString &appSocket,
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bool useSSL);
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virtual ~TCPSlaveBase();
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protected:
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#ifndef KDE_NO_COMPAT
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/**
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* @deprecated Due to inconsistency with KDE naming convention.
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*/
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KDE_DEPRECATED ssize_t Write(const void *data, ssize_t len) { return write( data, len ); }
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/**
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* @deprecated Due to inconsistency with KDE naming convention.
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*/
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KDE_DEPRECATED ssize_t Read(void *data, ssize_t len) { return read( data, len ); }
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/**
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* @deprecated Due to inconsistency with KDE naming convention.
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*/
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KDE_DEPRECATED ssize_t ReadLine(char *data, ssize_t len) { return readLine( data, len ); }
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/**
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* @deprecated Due to inconsistency with KDE naming convention.
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*/
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KDE_DEPRECATED unsigned short int GetPort(unsigned short int p) { return port(p); }
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/**
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* @deprecated Due to inconsistency with KDE naming convention.
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*/
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KDE_DEPRECATED bool ConnectToHost( const TQString &host, unsigned int port,
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bool sendError ) { return connectToHost( host, port, sendError ); }
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/**
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* @deprecated Due to inconsistency with KDE naming convention.
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*/
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KDE_DEPRECATED void CloseDescriptor() { closeDescriptor(); }
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/**
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* @deprecated Due to inconsistency with KDE naming convention.
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*/
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KDE_DEPRECATED bool AtEOF() { return atEnd(); }
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/**
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* @deprecated Due to inconsistency with KDE naming convention.
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*/
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KDE_DEPRECATED bool InitializeSSL() { return initializeSSL(); }
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/**
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* @deprecated Due to inconsistency with KDE naming convention.
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*/
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KDE_DEPRECATED void CleanSSL() { cleanSSL(); }
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#endif
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/**
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* This function acts like standard write function call
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* except it is also capable of making SSL or SOCKS
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* connections.
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*
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* @param data info to be sent to remote machine
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* @param len the length of the data to be sent
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*
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* @return the actual size of the data that was sent
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*/
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ssize_t write(const void *data, ssize_t len);
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/**
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* This function acts like standard read function call
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* except it is also capable of deciphering SSL data as
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* well as handling data over SOCKSified connections.
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*
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* @param data storage for the info read from server
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* @param len length of the info to read from the server
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*
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* @return the actual size of data that was obtained
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*/
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ssize_t read(void *data, ssize_t len);
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/**
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* Same as above except it reads data one line at a time.
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*/
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ssize_t readLine(char *data, ssize_t len);
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/**
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* Sets the maximum size of blocks read in during calls to readLine().
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* This allows a slave to optimize for the protocol which it implements.
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* Ideally this should be (common_line_length+1) or so.
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* Making this too large will have adverse effects on performance.
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* Initial/default value is 256(bytes)
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*/
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void setBlockSize(int sz);
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/**
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* Determines the appropriate port to use.
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*
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* This functions attempts to discover the appropriate port.
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*
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* @param _port the port to try, if it works, it is returned
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* @return the default port if the given port doesn't work
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*/
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unsigned short int port(unsigned short int _port);
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/**
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* Performs the initial TCP connection stuff and/or
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* SSL handshaking as necessary.
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*
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* Please note that unlike its deprecated counterpart, this
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* function allows you to disable any error message from being
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* sent back to the calling application! You can then use the
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* connectResult() function to determine the result of the
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* request for connection.
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*
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* @param host hostname
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* @param port port number to connect to
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* @param sendError if true sends error message to calling app.
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*
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* @return on succes, true is returned.
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* on failure, false is returned and an appropriate
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* error message is send to the application.
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*/
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bool connectToHost( const TQString &host, unsigned int port,
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bool sendError = true );
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/**
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* Are we using SSL?
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*
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* @return if so, true is returned.
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* if not, true isn't returned.
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* @since 3.2
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*/
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bool usingSSL() const { return m_bIsSSL; }
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/**
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* Are we using TLS?
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*
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* @return if so, true is returned.
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* if not, true isn't returned.
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* @since 3.2
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*/
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bool usingTLS() const;
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/**
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* @obsolete kept for binary compatibility
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* Are we using TLS?
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*
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* @return if so, true is returned.
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* if not, true isn't returned.
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*/
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bool usingTLS();
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/**
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* Can we use TLS?
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*
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* @return if so, true is returned.
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* if not, true isn't returned.
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*/
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bool canUseTLS();
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/**
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* Start using TLS on the connection.
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*
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* @return on success, 1 is returned.
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* on failure, 0 is returned.
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* on TLS init failure, -1 is returned.
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* on connect failure, -2 is returned.
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* on certificate failure, -3 is returned.
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*/
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int startTLS();
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/**
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* Stop using TLS on the connection.
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*/
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void stopTLS();
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/**
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* Closes the current file descriptor.
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*
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* Call this function to properly close up the socket
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* since it also takes care to prroperly close the stdio
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* fstream stuff, as well as sets the socket back to -1
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*/
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void closeDescriptor();
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/**
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* Returns true when end of data is reached
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*/
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bool atEnd();
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/**
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* Call this if you use persistent connections and want all the
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* metadata restored. This is particularly important for SSL
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* sessions since the app needs to know the state of connection,
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* certificates, etc.
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*/
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void setSSLMetaData();
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/**
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* Initializs all SSL variables
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*/
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bool initializeSSL();
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/**
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* Cleans up all SSL settings.
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*/
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void cleanSSL();
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/**
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* Determines whether or not we are still connected
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* to the remote machine.
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*
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* This method may fail to detect a closed SSL connection.
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*
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* return @p true if the socket is still active or
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* false otherwise.
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*/
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bool isConnectionValid();
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/**
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* Returns the status of the connection.
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*
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* This function allows you to invoke ConnectToHost
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* with the @p sendError flag set to false so that you
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* can send the appropriate error message back to the
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* calling io-slave.
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*
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* @return the status code as returned by KExtendedSocket.
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*/
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int connectResult();
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/**
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* Wait for some type of activity on the socket
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* for the period specified by @p t.
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*
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* @param t length of time in seconds that we should monitor the
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* socket before timing out.
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*
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* @return true if any activity was seen on the socket before the
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* timeout value was reached, false otherwise.
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*/
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bool waitForResponse( int t );
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/**
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* Sets the mode of the connection to blocking or non-blocking.
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*
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* Be sure to call this function before calling connectToHost.
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* Otherwise, this setting will not have any effect until the next
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* @p connectToHost.
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*
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* @param b true to make the connection a blocking one, false otherwise.
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*/
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void setBlockConnection( bool b );
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/**
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* Sets how long to wait for orignally connecting to
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* the requested before timinig out.
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*
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* Be sure to call this function before calling ConnectToHost,
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* otherwise the setting will not take effect until the next call
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* to @p ConnectToHost.
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*
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* @param t timeout value
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*/
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void setConnectTimeout( int t );
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/**
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* Returns true if SSL tunneling is enabled.
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*
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* @see setEnableSSlTunnel
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*/
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bool isSSLTunnelEnabled();
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/**
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* Set up SSL tunneling mode.
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*
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* Calling this function with a @p true argument will allow
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* you to temprarly ignore the @p m_bIsSSL flag setting and
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* make a non-SSL connection. It is mostly useful for making
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* connections to SSL sites through a non-transparent proxy
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* server (i.e. most proxy servers out there).
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*
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* Note that once you have successfully "tunneled" through the
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* proxy server you must call this function with its argument
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* set to false to properly connect to the SSL site.
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*
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* @param enable if true SSL Tunneling will be enabled
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*/
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void setEnableSSLTunnel( bool enable );
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/**
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* Sets up the the real hostname for an SSL connection
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* that goes through a proxy server.
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*
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* This function is essential in making sure that the
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* real hostname is used for validating certificates from
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* SSL sites!
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*
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* @param realHost the actual host name we are connecting to
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*/
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void setRealHost( const TQString& realHost );
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// don't use me!
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void doConstructorStuff();
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// For the certificate verification code
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int verifyCertificate();
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// For prompting for the certificate to use
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void certificatePrompt();
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// Did the user abort (as the reason for connectToHost returning false)
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bool userAborted() const;
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protected:
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int m_iSock;
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bool m_bIsSSL;
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unsigned short int m_iPort;
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unsigned short int m_iDefaultPort;
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TQCString m_sServiceName;
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FILE *fp;
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private:
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bool doSSLHandShake( bool sendError );
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protected:
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virtual void virtual_hook( int id, void* data );
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private:
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class TcpSlaveBasePrivate;
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TcpSlaveBasePrivate *d;
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};
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}
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#endif
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