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/* -*- C++ -*-
* Copyright (C) 2003 Thiago Macieira <thiago.macieira@kdemail.net>
*
*
* Permission is hereby granted, free of charge, to any person obtaining
* a copy of this software and associated documentation files (the
* "Software"), to deal in the Software without restriction, including
* without limitation the rights to use, copy, modify, merge, publish,
* distribute, sublicense, and/or sell copies of the Software, and to
* permit persons to whom the Software is furnished to do so, subject to
* the following conditions:
*
* The above copyright notice and this permission notice shall be included
* in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
* LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
* OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
#ifndef KREVERSERESOLVER_H
#define KREVERSERESOLVER_H
//////////////////
// Needed includes
#include <qobject.h>
#include <qstring.h>
#include "ksocketaddress.h"
namespace KNetwork {
class KReverseResolverPrivate;
/** @class KReverseResolver kreverseresolver.h kreverseresolver.h
* @brief Run a reverse-resolution on a socket address.
*
* This class is provided as a counterpart to KResolver in such a way
* as it produces a reverse resolution: it resolves a socket address
* from its binary representations into a textual representation.
*
* Most users will use the static functions @ref resolve, which work
* both synchronously (blocking) and asynchronously (non-blocking).
*
* @author Thiago Macieira <thiago.macieira@kdemail.net>
*/
class KDECORE_EXPORT KReverseResolver: public QObject
{
Q_OBJECT
public:
/**
* Flags for the reverse resolution.
*
* These flags are used by the reverse resolution functions for
* setting resolution parameters. The possible values are:
* @li NumericHost: don't try to resolve the host address to a text form.
* Instead, convert the address to its numeric textual representation.
* @li NumericService: the same as NumericHost, but for the service name
* @li NodeNameOnly: returns the node name only (i.e., not the Fully
* Qualified Domain Name)
* @li Datagram: in case of ambiguity in the service name, prefer the
* name associated with the datagram protocol
* @li NumericScope: for those addresses which have the concept of scope,
* resolve using the numeric value instead of the proper scope name.
* @li ResolutionRequired: normally, when resolving, if the name resolution
* fails, the process normally converts the numeric address into its
* presentation forms. This flag causes the function to return
* with error instead.
*/
enum Flags
{
NumericHost = 0x01,
NumericService = 0x02,
NodeNameOnly = 0x04,
Datagram = 0x08,
NumericScope = 0x10,
ResolutionRequired = 0x20
};
/**
* Constructs this object to resolve the given socket address.
*
* @param addr the address to resolve
* @param flags the flags to use, see @ref Flags
*/
KReverseResolver(const KSocketAddress& addr, int flags = 0,
QObject * = 0L, const char * = 0L);
/**
* Destructor.
*/
virtual ~KReverseResolver();
/**
* This function returns 'true' if the processing is still running.
*/
bool isRunning() const;
/**
* This function returns true if the processing has finished with
* success, false if it's still running or failed.
*/
bool success() const;
/**
* This function returns true if the processing has finished with
* failure, false if it's still running or succeeded.
*/
bool failure() const;
/**
* Returns the resolved node name, if the resolution has finished
* successfully, or QString::null otherwise.
*/
QString node() const;
/**
* Returns the resolved service name, if the resolution has finished
* successfully, or QString::null otherwise.
*/
QString service() const;
/**
* Returns the socket address which was subject to resolution.
*/
const KSocketAddress& address() const;
/**
* Starts the resolution. This function returns 'true'
* if the resolution has started successfully.
*/
bool start();
/**
* Overrides event handling
*/
virtual bool event(QEvent* );
signals:
/**
* This signal is emitted when the resolution has finished.
*
* @param obj this class, which contains the results
*/
void finished(const KReverseResolver& obj);
public:
/**
* Resolves a socket address to its textual representation
*
* FIXME!! How can we do this in a non-blocking manner!?
*
* This function is used to resolve a socket address from its
* binary representation to a textual form, even if numeric only.
*
* @param addr the socket address to be resolved
* @param node the QString where we will store the resolved node
* @param serv the QString where we will store the resolved service
* @param flags flags to be used for this resolution.
* @return true if the resolution succeeded, false if not
* @see ReverseFlags for the possible values for @p flags
*/
static bool resolve(const KSocketAddress& addr, QString& node,
QString& serv, int flags = 0);
/**
* Resolves a socket address to its textual representation
*
* FIXME!! How can we do this in a non-blocking manner!?
*
* This function behaves just like the above one, except it takes
* a sockaddr structure and its size as parameters.
*
* @param sa the sockaddr structure containing the address to be resolved
* @param salen the length of the sockaddr structure
* @param node the QString where we will store the resolved node
* @param serv the QString where we will store the resolved service
* @param flags flags to be used for this resolution.
* @return true if the resolution succeeded, false if not
* @see ReverseFlags for the possible values for @p flags
*/
static bool resolve(const struct sockaddr* sa, Q_UINT16 salen,
QString& node, QString& serv, int flags = 0);
private:
KReverseResolverPrivate* d;
};
} // namespace KNetwork
#endif
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