/*
* $Id: tcpslavebase_h.html 132191 2002-01-17 21:32:13Z dfaure $
*
* Copyright (C) 2000 Alex Zepeda
* Copyright (C) 2001 George Staikos
* Copyright (C) 2001 Dawit Alemayehu
*
* This file is part of the KDE project
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library 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
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public License
* along with this library; see the file COPYING.LIB. If not, write to
* the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
#ifndef _TCP_SLAVEBASE_H
#define _TCP_SLAVEBASE_H "$Id: tcpslavebase_h.html 132191 2002-01-17 21:32:13Z dfaure $"
#ifdef HAVE_CONFIG_H
#include
#endif
#include
#include
#include
#include
namespace KIO {
/**
* There are two classes that specifies the protocol between application (job)
* and kioslave. SlaveInterface is the class to use on the application end,
* SlaveBase is the one to use on the slave end.
*
* Slave implementations should simply inherit SlaveBase
*
* A call to foo() results in a call to slotFoo() on the other end.
*/
class TCPSlaveBase : public SlaveBase
{
public:
TCPSlaveBase(unsigned short int default_port, const QCString &protocol,
const QCString &pool_socket, const QCString &app_socket);
TCPSlaveBase(unsigned short int default_port, const QCString &protocol,
const QCString &pool_socket, const QCString &app_socket,
bool useSSL);
virtual ~TCPSlaveBase();
protected:
/**
* This function acts like standard write function call
* except it is also capable of making SSL or SOCKS
* connections.
*
* @param data info to be sent to remote machine
* @param len the length of the data to be sent
*
* @return the actual size of the data that was sent
*/
ssize_t Write(const void *data, ssize_t len);
/**
* This function acts like standard read function call
* except it is also capable of deciphering SSL data as
* well as handling data over SOCKSified connections.
*
* @param data storage for the info read from server
* @param len lenght of the info to read from the server
*
* @return the actual size of data that was obtained
*/
ssize_t Read(void *data, ssize_t len);
/**
* Same as above except it reads data one line at a time.
*/
ssize_t ReadLine(char *data, ssize_t len);
/**
* Determines the appropiate port to use.
*
* This functions attempts to discover the appropriate port.
*
* @param port
*/
unsigned short int GetPort(unsigned short int port);
/**
* Performs the initial TCP connection stuff and/or
* SSL handshaking as necessary.
*
* Please note that unlike its deprecated counterpart, this
* function allows you to disable any error message from being
* sent back to the calling application! You can then use the
* @ref connectResult() function to determine the result of the
* request for connection.
*
* @param host hostname
* @param port port number
* @param sendError if true sends error message to calling app.
*
* @return on succes, true is returned.
* on failure, false is returned and an appropriate
* error message is send to the application.
*/
bool ConnectToHost( const QString &host, unsigned int port,
bool sendError );
/**
* @deprecated Use the above method instead.
*
* FIXME: Remove in KDE 3.0
*/
bool ConnectToHost(const QCString &host, unsigned short int port);
/**
* Are we using TLS?
*
* @return if so, true is returned.
* if not, true isn't returned.
*/
bool usingTLS();
/**
* Can we use TLS?
*
* @return if so, true is returned.
* if not, true isn't returned.
*/
bool canUseTLS();
/**
* Start using TLS on the connection.
*
* @return on success, 1 is returned.
* on failure, 0 is returned.
* on TLS init failure, -1 is returned.
* on connect failure, -2 is returned.
* on certificate failure, -3 is returned.
*/
int startTLS();
/**
* Stop using TLS on the connection.
*/
void stopTLS();
/**
* Closes the current file descriptor.
*
* Call this function to properly close up the socket
* since it also takes care to prroperly close the stdio
* fstream stuff, as well as sets the socket back to -1
*/
void CloseDescriptor();
/**
* Returns true when end of data is reached
*/
bool AtEOF();
/**
* Initializs all SSL variables
*/
bool InitializeSSL();
/**
* Cleans up all SSL settings.
*/
void CleanSSL();
/**
* Determines whether or not we are still connected
* to the remote machine.
*
* return @p true if the socket is still active, false otherwise.
*/
bool isConnectionValid();
/**
* Returns the status of the connection.
*
* This function allows to retrieve the result of a call
* to @ref ConnectToHost with the @p sendError flag set to
* false. That way your io-slave instead of this class will
* send the appropriate error message back to the calling to
* the application that requested the service.
*
* @return the status code as returned by KExtendedSocket.
*/
int connectResult();
/**
* Wait for some type of activity 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 activity was seen 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 @ref 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 setBlockConnection( bool b );
/**
* Sets how long to wait for orignally connecting to
* the requested before timinig out.
*
* Be sure to call this function before calling @ref ConnectToHost,
* otherwise the setting will not take effect until the next call
* to @p ConnectToHost.
*
* @param t timeout value
*/
void setConnectTimeout( int t );
/**
* Returns true if SSL tunneling is enabled.
*
* @see setEnableSSlTunnel
*/
bool isSSLTunnelEnabled();
/**
* Sets up SSL tunneling through a proxy server.
*
* Call this function with a @p enable paramter set to true to
* temprarly ignore the ssl flag setting and make a non-SSL
* connection. It is mostly useful for making connections to
* SSL sites through a non-transparent proxy server (i.e. most
* proxy servers out there).
*
* Note that once you have successfully "tunneled" through the
* proxy server you must call this function with its argument
* set to false to properly connect to the SSL site.
*
* @param enable true enables SSL Tunneling.
*/
void setEnableSSLTunnel( bool enable );
/**
* Sets up the the real hostname for an SSL connection
* that goes through a proxy server.
*
* This function is essential in making sure that the
* real hostname is used for validating certificates from
* SSL sites!
*
* @param realHost the actual host name we are connecting to
*/
void setRealHost( const QString& realHost );
// don't use me!
void doConstructorStuff();
// For the certificate verification code
int verifyCertificate();
// For prompting for the certificate to use
void certificatePrompt();
int m_iSock;
bool m_bIsSSL;
unsigned short int m_iPort;
unsigned short int m_iDefaultPort;
QCString m_sServiceName;
FILE *fp;
class TcpSlaveBasePrivate;
TcpSlaveBasePrivate *d;
private:
bool doSSLHandShake( bool sendError );
};
};
#endif
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