You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
523 lines
15 KiB
523 lines
15 KiB
/* -*- 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 KCLIENTSOCKETBASE_H
|
|
#define KCLIENTSOCKETBASE_H
|
|
|
|
#include <tqobject.h>
|
|
#include <tqstring.h>
|
|
|
|
#include "ksocketbase.h"
|
|
#include "kresolver.h"
|
|
#include <kdelibs_export.h>
|
|
|
|
namespace KNetwork {
|
|
|
|
class KClientSocketBasePrivate;
|
|
/** @class KClientSocketBase kclientsocketbase.h kclientsocketbase.h
|
|
* @brief Abstract client socket class.
|
|
*
|
|
* This class provides the base functionality for client sockets,
|
|
* such as, and especially, name resolution and signals.
|
|
*
|
|
* @note This class is abstract. If you're looking for a normal,
|
|
* client socket class, see @ref KStreamSocket and KBufferedSocket
|
|
*
|
|
* @author Thiago Macieira <thiago.macieira@kdemail.net>
|
|
*/
|
|
class KDECORE_EXPORT KClientSocketBase : public TQObject, public KActiveSocketBase
|
|
{
|
|
Q_OBJECT
|
|
|
|
public:
|
|
/**
|
|
* Socket states.
|
|
*
|
|
* These are the possible states for a KClientSocketBase:
|
|
* - Idle: socket is not connected
|
|
* - HostLookup: socket is doing host lookup prior to connecting
|
|
* - HostFound: name lookup is complete
|
|
* - Bound: the socket is locally bound
|
|
* - Connecting: socket is attempting connection
|
|
* - Open: socket is open
|
|
* - Connected (=Open): socket is connected
|
|
* - Connection (=Open): yet another name for a connected socket
|
|
* - Closing: socket is shutting down
|
|
*
|
|
* Whenever the socket state changes, the @ref stateChanged(int) signal
|
|
* will be emitted.
|
|
*/
|
|
enum SocketState
|
|
{
|
|
Idle,
|
|
HostLookup,
|
|
HostFound,
|
|
Bound,
|
|
Connecting,
|
|
Open,
|
|
Closing,
|
|
|
|
Unconnected = Bound,
|
|
Connected = Open,
|
|
Connection = Open
|
|
};
|
|
|
|
public:
|
|
/**
|
|
* Default constructor.
|
|
*
|
|
* @param parent the parent TQObject object
|
|
* @param name the name of this object
|
|
*/
|
|
KClientSocketBase(TQObject* parent, const char *name);
|
|
|
|
/**
|
|
* Destructor.
|
|
*/
|
|
virtual ~KClientSocketBase();
|
|
|
|
/**
|
|
* Returns the current state for this socket.
|
|
* @see SocketState
|
|
*/
|
|
SocketState state() const;
|
|
|
|
protected:
|
|
/**
|
|
* Sets the socket options. Reimplemented from KSocketBase.
|
|
*/
|
|
virtual bool setSocketOptions(int opts);
|
|
|
|
public:
|
|
/**
|
|
* Returns the internal KResolver object used for
|
|
* looking up the peer host name and service.
|
|
*
|
|
* This can be used to set extra options to the
|
|
* lookup process other than the default values, as well
|
|
* as obtaining the error codes in case of lookup failure.
|
|
*/
|
|
KResolver& peerResolver() const;
|
|
|
|
/**
|
|
* Returns the internal list of resolved results for the peer address.
|
|
*/
|
|
const KResolverResults& peerResults() const;
|
|
|
|
/**
|
|
* Returns the internal KResolver object used for
|
|
* looking up the local host name and service.
|
|
*
|
|
* This can be used to set extra options to the
|
|
* lookup process other than the default values, as well
|
|
* as obtaining the error codes in case of lookup failure.
|
|
*/
|
|
KResolver& localResolver() const;
|
|
|
|
/**
|
|
* Returns the internal list of resolved results for the local address.
|
|
*/
|
|
const KResolverResults& localResults() const;
|
|
|
|
/**
|
|
* Enables or disables name resolution. If this flag is set to true,
|
|
* @ref bind and @ref connect operations will trigger name lookup
|
|
* operations (i.e., converting a hostname into its binary form).
|
|
* If the flag is set to false, those operations will instead
|
|
* try to convert a string representation of an address without
|
|
* attempting name resolution.
|
|
*
|
|
* This is useful, for instance, when IP addresses are in
|
|
* their string representation (such as "1.2.3.4") or come
|
|
* from other sources like @ref KSocketAddress.
|
|
*
|
|
* @param enable whether to enable
|
|
*/
|
|
void setResolutionEnabled(bool enable);
|
|
|
|
/**
|
|
* Sets the allowed families for the resolutions.
|
|
*
|
|
* @param families the families that we want/accept
|
|
* @see KResolver::SocketFamilies for possible values
|
|
*/
|
|
void setFamily(int families);
|
|
|
|
/**
|
|
* Starts the lookup for peer and local hostnames as
|
|
* well as their services.
|
|
*
|
|
* If the blocking mode for this object is on, this function will
|
|
* wait for the lookup results to be available (by calling the
|
|
* @ref KResolver::wait method on the resolver objects).
|
|
*
|
|
* When the lookup is done, the signal @ref hostFound will be
|
|
* emitted (only once, even if we're doing a double lookup).
|
|
* If the lookup failed (for any of the two lookups) the
|
|
* @ref gotError signal will be emitted with the appropriate
|
|
* error condition (see @ref KSocketBase::SocketError).
|
|
*
|
|
* This function returns true on success and false on error. Note that
|
|
* this is not the lookup result!
|
|
*/
|
|
virtual bool lookup();
|
|
|
|
/**
|
|
* Binds this socket to the given nodename and service,
|
|
* or use the default ones if none are given.
|
|
*
|
|
* Upon successful binding, the @ref bound signal will be
|
|
* emitted. If an error is found, the @ref gotError
|
|
* signal will be emitted.
|
|
*
|
|
* @note Due to the internals of the name lookup and binding
|
|
* mechanism, some (if not most) implementations of this function
|
|
* do not actually bind the socket until the connection
|
|
* is requested (see @ref connect). They only set the values
|
|
* for future reference.
|
|
*
|
|
* This function returns true on success.
|
|
*
|
|
* @param node the nodename
|
|
* @param service the service
|
|
*/
|
|
virtual bool bind(const TQString& node = TQString::null,
|
|
const TQString& service = TQString::null) = 0;
|
|
|
|
/**
|
|
* Reimplemented from KSocketBase. Connect this socket to this
|
|
* specific address.
|
|
*
|
|
* Unlike @ref bind(const TQString&, const TQString&) above, this function
|
|
* really does bind the socket. No lookup is performed. The @ref bound
|
|
* signal will be emitted.
|
|
*/
|
|
virtual bool bind(const KResolverEntry& address);
|
|
|
|
/**
|
|
* Attempts to connect to the these hostname and service,
|
|
* or use the default ones if none are given. If a connection attempt
|
|
* is already in progress, check on its state and set the error status
|
|
* (NoError or InProgress).
|
|
*
|
|
* If the blocking mode for this object is on, this function will only
|
|
* return when all the resolved peer addresses have been tried or when
|
|
* a connection is established.
|
|
*
|
|
* Upon successfully connecting, the @ref connected signal
|
|
* will be emitted. If an error is found, the @ref gotError
|
|
* signal will be emitted.
|
|
*
|
|
* @par Note for derived classes:
|
|
* Derived classes must implement this function. The implementation
|
|
* will set the parameters for the lookup (using the peer KResolver
|
|
* object) and call @ref lookup to start it.
|
|
*
|
|
* @par
|
|
* The implementation should use the @ref hostFound
|
|
* signal to be notified of the completion of the lookup process and
|
|
* then proceed to start the connection itself. Care should be taken
|
|
* regarding the value of @ref blocking flag.
|
|
*
|
|
* @param node the nodename
|
|
* @param service the service
|
|
*/
|
|
virtual bool connect(const TQString& node = TQString::null,
|
|
const TQString& service = TQString::null) = 0;
|
|
|
|
/**
|
|
* @overload
|
|
* Reimplemented from KSocketBase.
|
|
*/
|
|
virtual bool connect(const KResolverEntry& address);
|
|
|
|
/**
|
|
* @deprecated
|
|
* This is a convenience function provided to ease migrating from
|
|
* Qt 3.x's TQSocket class.
|
|
*/
|
|
inline void connectToHost(const TQString& host, Q_UINT16 port)
|
|
{ connect(host, TQString::number(port)); }
|
|
|
|
/**
|
|
* Disconnects the socket.
|
|
* Note that not all socket types can disconnect.
|
|
*/
|
|
virtual bool disconnect();
|
|
|
|
/**
|
|
* Opens the socket. Reimplemented from TQIODevice.
|
|
*
|
|
* You should not call this function; instead, use @ref connect
|
|
*/
|
|
virtual inline bool open(int)
|
|
{ return connect(); }
|
|
|
|
/**
|
|
* Closes the socket. Reimplemented from TQIODevice.
|
|
*
|
|
* The closing of the socket causes the emission of the
|
|
* signal @ref closed.
|
|
*/
|
|
virtual void close();
|
|
|
|
/**
|
|
* This call is not supported on sockets. Reimplemented from TQIODevice.
|
|
*/
|
|
virtual void flush()
|
|
{ }
|
|
|
|
/**
|
|
* Returns the number of bytes available on this socket.
|
|
* Reimplemented from KSocketBase.
|
|
*/
|
|
#ifdef USE_QT3
|
|
virtual Q_LONG bytesAvailable() const;
|
|
#endif
|
|
#ifdef USE_QT4
|
|
virtual qint64 bytesAvailable() const;
|
|
#endif
|
|
|
|
/**
|
|
* Waits for more data. Reimplemented from KSocketBase.
|
|
*/
|
|
virtual Q_LONG waitForMore(int msecs, bool *timeout = 0L);
|
|
|
|
/**
|
|
* Reads data from a socket. Reimplemented from KSocketBase.
|
|
*/
|
|
virtual Q_LONG readBlock(char *data, Q_ULONG maxlen);
|
|
|
|
/**
|
|
* @overload
|
|
* Reads data from a socket. Reimplemented from KSocketBase.
|
|
*/
|
|
virtual Q_LONG readBlock(char *data, Q_ULONG maxlen, KSocketAddress& from);
|
|
|
|
/**
|
|
* Peeks data from the socket. Reimplemented from KSocketBase.
|
|
*/
|
|
virtual Q_LONG peekBlock(char *data, Q_ULONG maxlen);
|
|
|
|
/**
|
|
* @overload
|
|
* Peeks data from the socket. Reimplemented from KSocketBase.
|
|
*/
|
|
virtual Q_LONG peekBlock(char *data, Q_ULONG maxlen, KSocketAddress &from);
|
|
|
|
/**
|
|
* Writes data to the socket. Reimplemented from KSocketBase.
|
|
*/
|
|
virtual Q_LONG writeBlock(const char *data, Q_ULONG len);
|
|
|
|
/**
|
|
* @overload
|
|
* Writes data to the socket. Reimplemented from KSocketBase.
|
|
*/
|
|
virtual Q_LONG writeBlock(const char *data, Q_ULONG len, const KSocketAddress& to);
|
|
|
|
/**
|
|
* Returns the local socket address. Reimplemented from KSocketBase.
|
|
*/
|
|
virtual KSocketAddress localAddress() const;
|
|
|
|
/**
|
|
* Returns the peer socket address. Reimplemented from KSocketBase.
|
|
*/
|
|
virtual KSocketAddress peerAddress() const;
|
|
|
|
/**
|
|
* Returns true if the readyRead signal is set to be emitted.
|
|
*/
|
|
bool emitsReadyRead() const;
|
|
|
|
/**
|
|
* Enables the emission of the readyRead signal.
|
|
* By default, this signal is enabled.
|
|
*
|
|
* @param enable whether to enable the signal
|
|
*/
|
|
virtual void enableRead(bool enable);
|
|
|
|
/**
|
|
* Returns true if the readyWrite signal is set to be emitted.
|
|
*/
|
|
bool emitsReadyWrite() const;
|
|
|
|
/**
|
|
* Enables the emission of the readyWrite signal.
|
|
* By default, this signal is disabled.
|
|
*
|
|
* @param enable whether to enable the signal
|
|
*/
|
|
virtual void enableWrite(bool enable);
|
|
|
|
protected slots:
|
|
// protected slots
|
|
|
|
/**
|
|
* This slot is connected to the read notifier's signal meaning
|
|
* the socket can read more data.
|
|
*
|
|
* The default implementation only emits the readyRead signal.
|
|
*
|
|
* Override if your class requires processing of incoming
|
|
* data.
|
|
*/
|
|
virtual void slotReadActivity();
|
|
|
|
/**
|
|
* This slot is connected to the write notifier's signal
|
|
* meaning the socket can write more data.
|
|
*
|
|
* The default implementation only emits the readyWrite signal.
|
|
*
|
|
* Override if your class writes data from another source
|
|
* (like a buffer).
|
|
*/
|
|
virtual void slotWriteActivity();
|
|
|
|
private slots:
|
|
void lookupFinishedSlot();
|
|
|
|
signals:
|
|
/**
|
|
* This signal is emitted whenever the socket state changes.
|
|
*
|
|
* Note: do not delete this object inside the slot called by this
|
|
* signal.
|
|
*
|
|
* @param newstate the new state of the socket object
|
|
*/
|
|
void stateChanged(int newstate);
|
|
|
|
/**
|
|
* This signal is emitted when this object finds an error.
|
|
* The @p code parameter contains the error code that can
|
|
* also be found by calling @ref error.
|
|
*/
|
|
void gotError(int code);
|
|
|
|
/**
|
|
* This signal is emitted when the lookup is successfully completed.
|
|
*/
|
|
void hostFound();
|
|
|
|
/**
|
|
* This signal is emitted when the socket successfully binds
|
|
* to an address.
|
|
*
|
|
* @param local the local address we bound to
|
|
*/
|
|
void bound(const KResolverEntry& local);
|
|
|
|
/**
|
|
* This signal is emitted when the socket is about to connect
|
|
* to an address (but before doing so).
|
|
*
|
|
* The @p skip parameter can be used to make the loop skip this address.
|
|
* Its value is initially false: change it to true if you want to
|
|
* skip the current address (as given by @p remote).
|
|
*
|
|
* This function is also useful if one wants to reset the timeout.
|
|
*
|
|
* @param remote the address we're about to connect to
|
|
* @param skip set to true if you want to skip this address
|
|
* @note if the connection is successful, the @ref connected signal will be
|
|
* emitted.
|
|
*/
|
|
void aboutToConnect(const KResolverEntry& remote, bool& skip);
|
|
|
|
/**
|
|
* This socket is emitted when the socket successfully connects
|
|
* to a remote address.
|
|
*
|
|
* @param remote the remote address we did connect to
|
|
*/
|
|
void connected(const KResolverEntry& remote);
|
|
|
|
/**
|
|
* This signal is emitted when the socket completes the
|
|
* closing/shut down process.
|
|
*/
|
|
void closed();
|
|
|
|
/**
|
|
* This signal is emitted whenever the socket is ready for
|
|
* reading -- i.e., there is data to be read in the buffers.
|
|
* The subsequent read operation is guaranteed to be non-blocking.
|
|
*
|
|
* You can toggle the emission of this signal with the @ref enableRead
|
|
* function. This signal is by default enabled.
|
|
*/
|
|
void readyRead();
|
|
|
|
/**
|
|
* This signal is emitted whenever the socket is ready for
|
|
* writing -- i.e., whenever there's space available in the buffers
|
|
* to receive more data. The subsequent write operation is
|
|
* guaranteed to be non-blocking.
|
|
*
|
|
* You can toggle the emission of this signal with the @ref enableWrite
|
|
* function. This signal is by default disabled. You will
|
|
* want to disable this signal after the first reception, since
|
|
* it'll probably fire at every event loop.
|
|
*/
|
|
void readyWrite();
|
|
|
|
protected:
|
|
/**
|
|
* Sets the socket state to @p state. This function does not
|
|
* emit the @ref stateChanged signal.
|
|
*/
|
|
void setState(SocketState state);
|
|
|
|
/**
|
|
* This function is called by @ref setState whenever the state
|
|
* changes. You should override it if you need to specify any
|
|
* actions to be done when the state changes.
|
|
*
|
|
* The default implementation acts for these states only:
|
|
* - Connected: it sets up the socket notifiers to fire readyRead and
|
|
* readyWrite signals.
|
|
*/
|
|
virtual void stateChanging(SocketState newState);
|
|
|
|
/**
|
|
* Convenience function to set this object's error code to match
|
|
* that of the socket device.
|
|
*/
|
|
void copyError();
|
|
|
|
private:
|
|
KClientSocketBase(const KClientSocketBase&);
|
|
KClientSocketBase& operator=(const KClientSocketBase&);
|
|
|
|
KClientSocketBasePrivate *d;
|
|
};
|
|
|
|
} // namespace KNetwork
|
|
|
|
#endif
|