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.
434 lines
13 KiB
434 lines
13 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 KSOCKETDEVICE_H
|
|
#define KSOCKETDEVICE_H
|
|
|
|
#include <tqsocketnotifier.h>
|
|
#include "ksocketbase.h"
|
|
|
|
namespace KNetwork {
|
|
|
|
class KSocketDevice;
|
|
class KSocketDeviceFactoryBase;
|
|
|
|
class KSocketDevicePrivate;
|
|
/** @class KSocketDevice ksocketdevice.h ksocketdevice.h
|
|
* @brief Low-level socket functionality.
|
|
*
|
|
* This class provides low-level socket functionality.
|
|
*
|
|
* Most users will prefer "cooked" interfaces like those of @ref KStreamSocket or
|
|
* @ref KServerSocket.
|
|
*
|
|
* Descended classes from this one provide some other kinds of socket functionality,
|
|
* like proxying or specific socket types.
|
|
*
|
|
* @author Thiago Macieira <thiago.macieira@kdemail.net>
|
|
*/
|
|
class TDECORE_EXPORT KSocketDevice: public KActiveSocketBase, public KPassiveSocketBase
|
|
{
|
|
public:
|
|
/**
|
|
* Capabilities for the socket implementation.
|
|
*
|
|
* KSocketDevice-derived classes can implement certain capabilities that are not
|
|
* available in the default class. These capabilities are described by these flags.
|
|
* The default KSocketDevice class has none of these capabilities.
|
|
*
|
|
* For the negative capabilities (inabilities, the CanNot* forms), when a capability
|
|
* is not present, the implementation will default to the original behaviour.
|
|
*/
|
|
enum Capabilities
|
|
{
|
|
/** Can connect to hostnames.
|
|
* If this flag is present, the string form of @ref connect can be used. */
|
|
CanConnectString = 0x01,
|
|
|
|
/** Can bind to hostnames.
|
|
* If this flag is present, the string form of @ref bind can be used */
|
|
CanBindString = 0x02,
|
|
|
|
/** Can not bind.
|
|
* If this flag is present, this implementation cannot bind */
|
|
CanNotBind = 0x04,
|
|
|
|
/** Can not listen.
|
|
* If this flag is present, this implementation cannot listen */
|
|
CanNotListen = 0x08,
|
|
|
|
/**
|
|
* Can send multicast as well as join/leave multicast groups.
|
|
*/
|
|
CanMulticast = 0x10,
|
|
|
|
/**
|
|
* Can not use datagrams.
|
|
* Note that this implies multicast capability not being available either.
|
|
*/
|
|
CanNotUseDatagrams = 0x20
|
|
};
|
|
protected:
|
|
/// The socket file descriptor. It is used throughout the implementation
|
|
/// and subclasses.
|
|
int m_sockfd;
|
|
|
|
public:
|
|
/**
|
|
* Default constructor.
|
|
*
|
|
* The parameter is used to specify which socket this object is used as
|
|
* a device for.
|
|
*/
|
|
explicit KSocketDevice(const KSocketBase* = 0L);
|
|
|
|
/**
|
|
* Constructs a new object around an already-open socket.
|
|
*
|
|
* Note: you should write programs that create sockets through
|
|
* the classes whenever possible.
|
|
*/
|
|
explicit KSocketDevice(int fd);
|
|
|
|
/**
|
|
* Destructor. This closes the socket if it's open.
|
|
*/
|
|
virtual ~KSocketDevice();
|
|
|
|
/**
|
|
* Returns the file descriptor for this socket.
|
|
*/
|
|
inline int socket() const
|
|
{ return m_sockfd; }
|
|
|
|
/**
|
|
* Returns the set of capabilities this socket class implements.
|
|
* The set of capabilities is defined as an OR-ed mask of
|
|
* @ref Capabilities bits.
|
|
*
|
|
* The default implementation is guaranteed to always return 0. That
|
|
* is, derived implementations always return bits where they differ
|
|
* from the system standard sockets.
|
|
*/
|
|
virtual int capabilities() const
|
|
{ return 0; }
|
|
|
|
/**
|
|
* This implementation sets the options on the socket.
|
|
*/
|
|
virtual bool setSocketOptions(int opts);
|
|
|
|
/**
|
|
* Reimplementation from TQIODevice. You should not call this function in sockets.
|
|
*/
|
|
virtual bool open(TQ_OpenMode mode);
|
|
|
|
/**
|
|
* Closes the socket. Reimplemented from TQIODevice.
|
|
*
|
|
* Use this function to close the socket this object is holding open.
|
|
*/
|
|
virtual void close();
|
|
|
|
/**
|
|
* This call is not supported on sockets. Reimplemented from TQIODevice.
|
|
*/
|
|
virtual void flush()
|
|
{ }
|
|
|
|
/**
|
|
* Creates a socket but don't connect or bind anywhere.
|
|
* This function is the equivalent of the system call socket(2).
|
|
*/
|
|
virtual bool create(int family, int type, int protocol);
|
|
|
|
/**
|
|
* @overload
|
|
* Creates a socket but don't connect or bind anywhere.
|
|
*/
|
|
bool create(const KResolverEntry& address);
|
|
|
|
/**
|
|
* Binds this socket to the given address.
|
|
*/
|
|
virtual bool bind(const KResolverEntry& address);
|
|
|
|
/**
|
|
* Puts this socket into listening mode.
|
|
*/
|
|
virtual bool listen(int backlog = 5); // 5 is arbitrary
|
|
|
|
/**
|
|
* Connect to a remote host.
|
|
*/
|
|
virtual bool connect(const KResolverEntry& address);
|
|
|
|
/**
|
|
* Accepts a new incoming connection.
|
|
* Note: this function returns a socket of type KSocketDevice.
|
|
*/
|
|
virtual KSocketDevice* accept();
|
|
|
|
/**
|
|
* Disconnects this socket.
|
|
*/
|
|
virtual bool disconnect();
|
|
|
|
/**
|
|
* Returns the number of bytes available for reading without blocking.
|
|
*/
|
|
#ifdef USE_QT3
|
|
virtual TQ_LONG bytesAvailable() const;
|
|
#endif
|
|
#ifdef USE_QT4
|
|
virtual qint64 bytesAvailable() const;
|
|
#endif
|
|
|
|
/**
|
|
* Waits up to @p msecs for more data to be available on this socket.
|
|
*
|
|
* This function is a wrapper against @ref poll. This function will wait
|
|
* for any read events.
|
|
*/
|
|
virtual TQ_LONG waitForMore(int msecs, bool *timeout = 0L);
|
|
|
|
/**
|
|
* Reads data from this socket.
|
|
*/
|
|
virtual TQT_TQIO_LONG tqreadBlock(char *data, TQT_TQIO_ULONG maxlen);
|
|
|
|
/**
|
|
* Reads data and the source address from this socket.
|
|
*/
|
|
virtual TQT_TQIO_LONG tqreadBlock(char *data, TQT_TQIO_ULONG maxlen, KSocketAddress& from);
|
|
|
|
/**
|
|
* Peeks data in the socket.
|
|
*/
|
|
virtual TQ_LONG peekBlock(char *data, TQ_ULONG maxlen);
|
|
|
|
/**
|
|
* Peeks the data in the socket and the source address.
|
|
*/
|
|
virtual TQ_LONG peekBlock(char *data, TQ_ULONG maxlen, KSocketAddress& from);
|
|
|
|
/**
|
|
* Writes data to the socket.
|
|
*/
|
|
virtual TQT_TQIO_LONG tqwriteBlock(const char *data, TQT_TQIO_ULONG len);
|
|
|
|
/**
|
|
* Writes the given data to the given destination address.
|
|
*/
|
|
virtual TQT_TQIO_LONG tqwriteBlock(const char *data, TQT_TQIO_ULONG len, const KSocketAddress& to);
|
|
|
|
/**
|
|
* Returns this socket's local address.
|
|
*/
|
|
virtual KSocketAddress localAddress() const;
|
|
|
|
/**
|
|
* Returns this socket's peer address. If this implementation does proxying
|
|
* of some sort, this is the real external address, not the proxy's address.
|
|
*/
|
|
virtual KSocketAddress peerAddress() const;
|
|
|
|
/**
|
|
* Returns this socket's externally visible local address.
|
|
*
|
|
* If this socket has a local address visible externally different
|
|
* from the normal local address (as returned by @ref localAddress), then
|
|
* return it.
|
|
*
|
|
* Certain implementations will use proxies and thus have externally visible
|
|
* addresses different from the local socket values. The default implementation
|
|
* returns the same value as @ref localAddress.
|
|
*
|
|
* @note This function may return an empty KSocketAddress. In that case, the
|
|
* externally visible address could/can not be determined.
|
|
*/
|
|
virtual KSocketAddress externalAddress() const;
|
|
|
|
/**
|
|
* Returns a socket notifier for input on this socket.
|
|
* The notifier is created only when requested. Whether
|
|
* it is enabled or not depends on the implementation.
|
|
*
|
|
* This function might return NULL.
|
|
*/
|
|
TQSocketNotifier* readNotifier() const;
|
|
|
|
/**
|
|
* Returns a socket notifier for output on this socket.
|
|
* The is created only when requested.
|
|
*
|
|
* This function might return NULL.
|
|
*/
|
|
TQSocketNotifier* writeNotifier() const;
|
|
|
|
/**
|
|
* Returns a socket notifier for exceptional events on this socket.
|
|
* The is created only when requested.
|
|
*
|
|
* This function might return NULL.
|
|
*/
|
|
TQSocketNotifier* exceptionNotifier() const;
|
|
|
|
/**
|
|
* Executes a poll in the socket, via select(2) or poll(2).
|
|
* The events polled are returned in the parameters pointers.
|
|
* Set any of them to NULL to disable polling of that event.
|
|
*
|
|
* On exit, @p input, @p output and @p exception will contain
|
|
* true if an event of that kind is waiting on the socket or false
|
|
* if not. If a timeout occurred, set @p timedout to true (all other
|
|
* parameters are necessarily set to false).
|
|
*
|
|
* @param input if set, turns on polling for input events
|
|
* @param output if set, turns on polling for output events
|
|
* @param exception if set, turns on polling for exceptional events
|
|
* @param timeout the time in milliseconds to wait for an event;
|
|
* 0 for no wait and any negative value to wait forever
|
|
* @param timedout on exit, will contain true if the polling timed out
|
|
* @return true if the poll call succeeded and false if an error occurred
|
|
*/
|
|
virtual bool poll(bool* input, bool* output, bool* exception = 0L,
|
|
int timeout = -1, bool* timedout = 0L);
|
|
|
|
/**
|
|
* Shorter version to poll for any events in a socket. This call
|
|
* polls for input, output and exceptional events in a socket but
|
|
* does not return their states. This is useful if you need to wait for
|
|
* any event, but don't need to know which; or for timeouts.
|
|
*
|
|
* @param timeout the time in milliseconds to wait for an event;
|
|
* 0 for no wait and any negative value to wait forever
|
|
* @param timedout on exit, will contain true if the polling timed out
|
|
* @return true if the poll call succeeded and false if an error occurred
|
|
*/
|
|
bool poll(int timeout = -1, bool* timedout = 0L);
|
|
|
|
protected:
|
|
/**
|
|
* Special constructor. This constructor will cause the internal
|
|
* socket device NOT to be set. Use this if your socket device class
|
|
* takes another underlying socket device.
|
|
*
|
|
* @param parent the parent, if any
|
|
*/
|
|
KSocketDevice(bool, const KSocketBase* parent = 0L);
|
|
|
|
/**
|
|
* Creates a socket notifier of the given type.
|
|
*
|
|
* This function is called by @ref readNotifier, @ref writeNotifier and
|
|
* @ref exceptionNotifier when they need to create a socket notifier
|
|
* (i.e., the first call to those functions after the socket is open).
|
|
* After that call, those functions cache the socket notifier and will
|
|
* not need to call this function again.
|
|
*
|
|
* Reimplement this function in your derived class if your socket type
|
|
* requires a different kind of TQSocketNotifier. The return value should
|
|
* be deleteable with delete. (@ref close deletes them).
|
|
*
|
|
* @param type the socket notifier type
|
|
*/
|
|
virtual TQSocketNotifier* createNotifier(TQSocketNotifier::Type type) const;
|
|
|
|
public:
|
|
/**
|
|
* Creates a new default KSocketDevice object given
|
|
* the parent object.
|
|
*
|
|
* The capabilities flag indicates the desired capabilities the object being
|
|
* created should possess. Those capabilities are not guaranteed: if no factory
|
|
* can provide such an object, a default object will be created.
|
|
*
|
|
* @param parent the KSocketBase parent
|
|
*/
|
|
static KSocketDevice* createDefault(KSocketBase* parent);
|
|
|
|
/**
|
|
* @overload
|
|
*
|
|
* This will create an object only if the requested capabilities match.
|
|
*
|
|
* @param parent the parent
|
|
* @param capabilities the requested capabilities
|
|
*/
|
|
static KSocketDevice* createDefault(KSocketBase* parent, int capabilities);
|
|
|
|
/**
|
|
* Sets the default KSocketDevice implementation to use and
|
|
* return the old factory.
|
|
*
|
|
* @param factory the factory object for the implementation
|
|
*/
|
|
static KSocketDeviceFactoryBase* setDefaultImpl(KSocketDeviceFactoryBase* factory);
|
|
|
|
/**
|
|
* Adds a factory of KSocketDevice objects to the list, along with its
|
|
* capabilities flag.
|
|
*/
|
|
static void addNewImpl(KSocketDeviceFactoryBase* factory, int capabilities);
|
|
|
|
private:
|
|
KSocketDevice(const KSocketDevice&);
|
|
KSocketDevice& operator=(const KSocketDevice&);
|
|
|
|
KSocketDevicePrivate *d;
|
|
};
|
|
|
|
/** @internal
|
|
* This class provides functionality for creating and registering
|
|
* socket implementations.
|
|
*/
|
|
class KSocketDeviceFactoryBase
|
|
{
|
|
public:
|
|
KSocketDeviceFactoryBase() {}
|
|
virtual ~KSocketDeviceFactoryBase() {}
|
|
|
|
virtual KSocketDevice* create(KSocketBase*) const = 0;
|
|
};
|
|
|
|
/**
|
|
* This class provides functionality for creating and registering
|
|
* socket implementations.
|
|
*/
|
|
template<class Impl>
|
|
class KSocketDeviceFactory: public KSocketDeviceFactoryBase
|
|
{
|
|
public:
|
|
KSocketDeviceFactory() {}
|
|
virtual ~KSocketDeviceFactory() {}
|
|
|
|
virtual KSocketDevice* create(KSocketBase* parent) const
|
|
{ return new Impl(parent); }
|
|
};
|
|
|
|
} // namespaces
|
|
|
|
#endif
|