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tdelibs/kdecore/kextsock.h

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/*
* This file is part of the KDE libraries
* Copyright (C) 2000-2004 Thiago Macieira <thiago.macieira@kdemail.net>
*
* 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., 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
#ifndef KEXTSOCK_H
#define KEXTSOCK_H
#include "kdelibs_export.h"
#ifdef Q_MOC_RUN
#define Q_OS_UNIX
#endif // Q_MOC_RUN
#ifdef Q_OS_UNIX
#include <sys/time.h>
#include <tqstring.h>
#include <tqptrlist.h>
#include <tqiodevice.h>
#include "kbufferedio.h"
#include "ksockaddr.h"
/* External reference to netdb.h */
struct addrinfo;
struct kde_addrinfo;
class KAddressInfo; /* our abstraction of it */
class TQSocketNotifier;
/*
* This is extending QIODevice's error codes
*
* According to tqiodevice.h, the last error is IO_UnspecifiedError
* These errors will never occur in functions declared in QIODevice
* (except open, but you shouldn't call open)
*/
#define IO_ListenError (IO_UnspecifiedError+1)
#define IO_AcceptError (IO_UnspecifiedError+2)
#define IO_LookupError (IO_UnspecifiedError+3)
class KExtendedSocketPrivate;
/**
* The extended socket class.
*
* This class should be used instead of KSocket whenever the user needs
* fine-grained control over the socket being created. Unlike KSocket, which
* does everything at once, without much intervention, KExtendedSocket allows
* intervention at every step of the process and the setting of parameters.
*
* This class allows for the creation of both server and client sockets. The
* only difference is that the passiveSocket flag must be passed either to
* the constructor or to setSocketFlags(). If passiveSocket is used, the class will
* enable functions listen() and accept() and related signals, and will
* also disable tqreadBlock() and tqwriteBlock().
*
* To create a Unix socket, one would pass flag unixSocket to the constructor
* or setSocketFlags(). The hostname and service/port can be set to whatever is
* necessary. If no hostname is given, but a service/port is, the socket created
* will be implementation dependant (usually in /tmp). In any other case, the
* fields will be concatenated.
*
* To create an Internet socket, inetSocket flag can be used. If, on the other
* hand a specific IP protocol is desired, ipv4Socket and/or ipv6Socket can be
* used.
*
* Note that the socket type selection flags are cumulative. One could select
* Unix and Internet sockets by using unixSocket | inetSocket. Or, for instance,
* to make sure only IPv4 and IPv6 sockets are selected, even if future implementations
* support newer IP protocols, ipv4Socket | ipv6Socket is your guy.
*
* @deprecated
* This class is now deprecated. Please use the classes in KNetwork for
* new programs. In particular, this class is replaced by KNetwork::KStreamSocket
* and @ref KNetwork::KServerSocket.
*
* @author Thiago Macieira <thiago.macieira@kdemail.net>
* @short an extended socket
*/
class KDECORE_EXPORT KExtendedSocket: public KBufferedIO // public TQObject, public QIODevice
{
Q_OBJECT
TQ_OBJECT
public:
/**
* flags that can be passed down to the member functions
*/
enum Flags
{
/* socket address families */
/*
* NOTE: if you change this, you have to change function valid_socket() as well
* These values are hard coded!
*/
anySocket = 0x00,
knownSocket = 0x01,
unixSocket = knownSocket | 0x02,
inetSocket = knownSocket | 0x04,
ipv4Socket = inetSocket | 0x100,
ipv6Socket = inetSocket | 0x200,
passiveSocket = 0x1000, /* passive socket (i.e., one that accepts connections) */
canonName = 0x2000, /* request that the canon name be found */
noResolve = 0x4000, /* do not attempt to resolve, treat as numeric host */
streamSocket = 0x8000, /* request a streaming socket (e.g., TCP) */
datagramSocket = 0x10000, /* request a datagram socket (e.g., UDP) */
rawSocket = 0x20000, /* request a raw socket. This probably requires privileges */
inputBufferedSocket = 0x200000, /* buffer input in this socket */
outputBufferedSocket = 0x400000, /* buffer output in this socket */
bufferedSocket = 0x600000 /* make this a fully buffered socket */
};
/**
* status of the class
* The status are sequential. If a change to one status is requested,
* all the prior status will be passed and their actions, performed
*/
enum SockStatus
{
// the numbers are scattered so that we leave room for future expansion
error = -1, // invalid status!
nothing = 0, // no status, the class has just been created
lookupInProgress = 50, // lookup is in progress. Signals will be sent
lookupDone = 70, // lookup has been done. Flags cannot be changed
// from this point on
created = 100, // ::socket() has been called, a socket exists
bound = 140, // socket has been bound
connecting = 200, // socket is connecting (not passiveSocket)
connected = 220, // socket has connected (not passiveSocket)
listening = 200, // socket is listening (passiveSocket)
accepting = 220, // socket is accepting (passiveSocket)
closing = 350, // socket is closing (delayed close)
done = 400 // socket has been closed
};
public:
/**
* Creates an empty KExtendedSocket.
*/
KExtendedSocket();
/**
* Creates a socket with the given hostname and port.
*
* If this is a connecting (active) socket, the hostname and port specify
* the remote address to which we will connect.
*
* If this is a listening (passive) socket, the hostname and port specify
* the address to listen on. In order to listen on every interface
* available on this node, set @p host to TQString::null. To let the operating
* system select a port, set it to 0.
*
* @sa setAddress
* @param host the hostname
* @param port the port number
* @param flags flags
*/
KExtendedSocket(const TQString& host, int port, int flags = 0);
/**
* Creates a socket with the given hostname and service.
*
* If this is a connecting (active) socket, the hostname and service specify
* the remote address to which we will connect.
*
* If this is a listening (passive) socket, the hostname and service specify
* the address to listen on. In order to listen on every interface
* available on this node, set @p host to TQString::null. To let the operating
* system select a port, set the service to "0".
*
* @sa setAddress
* @param host the hostname
* @param service the service
* @param flags flags
*/
KExtendedSocket(const TQString& host, const TQString& service, int flags = 0);
/**
* Destroys the socket, disconnecting if still connected and
* freeing any related resources still being kept.
*/
virtual ~KExtendedSocket();
/**
* Resets the socket, disconnecting if still connected and
* freeing any related resources still being kept.
* @since 3.1
*/
#ifdef USE_QT3
void reset();
#endif // USE_QT3
#ifdef USE_QT4
bool reset();
#endif // USE_QT4
/*
* --- status, flags and internal variables --- *
*/
/**
* Returns the class status.
* @return the class status
* @see ::SockStatus
*/
int socketStatus() const;
/**
* Returns the related system error code
* Except for IO_LookupError errors, these are codes found in
* errno
* @return the system error code
*/
int systemError() const;
/**
* Sets the given flags.
* @param flags the flags to be set
* @return the new flags status, or -1 if flags can no longer be set
*/
int setSocketFlags(int flags);
/**
* Returns the current flags
* @return the current flags
* @see ::Flags
*/
int socketFlags() const;
/**
* Sets the hostname to the given value.
*
* If this is a listening (passive) socket, the hostname is the host to which the socket
* will bind in order to listen. If you want to listen in every interface, set it
* to "*" or TQString::null.
*
* If this is a connecting (active) socket, the hostname is the host to which we will try
* to connect.
*
* @param host the hostname
* @return true on success, false on error
*/
bool setHost(const TQString& host);
/**
* Returns the hostname.
* @return the hostname or TQString::null if no host has been set
*/
TQString host() const;
/**
* Sets the port/service.
* @param port the port
*/
bool setPort(int port);
/**
* Sets the port/service.
*
* In the case of Unix-domain sockets, the port is the filename for the socket.
* If the name is not an absolute path, "/tmp/" will be prepended.
*
* @param port the port
* @return true if successful, false on error (e.g. connection already established)
*/
bool setPort(const TQString& port);
/**
* Returns the port/service. If it is a port, the string contains a number.
* @return the port or TQString::null if it has not been set.
*/
TQString port() const;
/**
* Sets the address where we will connect to.
*
* See @ref setHost and @ref setPort for information on the parameters.
*
* @param host the hostname
* @param port port number
* @return true if successful, false on error (e.g. connection already established)
*/
bool setAddress(const TQString& host, int port);
/**
* Sets the address where we will connect to.
*
* See @ref setHost and @ref setPort for information on the parameters.
*
* @param host the hostname
* @param serv the service
* @return true if successful, false on error (e.g. connection already established)
*/
bool setAddress(const TQString& host, const TQString& serv);
/**
* Sets the hostname to which we will bind locally before connecting.
* @param host the hostname
* @return false if this is a passiveSocket, otherwise true.
*/
bool setBindHost(const TQString& host);
/**
* Unsets the bind hostname. That is, don't request a binding host.
* @return true if successful, false on error (e.g. connection already established)
*/
bool unsetBindHost();
/**
* Returns the hostname to which the socket will be/is bound.
* @return the host or TQString::null if it has not been set.
*/
TQString bindHost() const;
/**
* Sets the port/service to which we will bind before connecting
* @param port the port number
* @return true if successful, false on error (e.g. connection already established)
*/
bool setBindPort(int port);
/**
* Sets the port/service to which we will bind before connecting.
* @param service the port number or service name
* @return true if successful, false on error (e.g. connection already established)
*/
bool setBindPort(const TQString& service);
/**
* Unsets the bind port/service.
* @return true if successful, false on error (e.g. connection already established)
*/
bool unsetBindPort();
/**
* Returns the service to which the socket will be/is bound.
* @return the host or TQString::null if it has not been set.
*/
TQString bindPort() const;
/**
* Sets both host and port to which we will bind the socket. Will return
* false if this is a passiveSocket.
* @param host the hostname
* @param port the port number
* @return true if successful, false on error (e.g. connection already established)
*/
bool setBindAddress(const TQString& host, int port);
/**
* Sets both host and service to which we will bind the socket. Will return
* false if this is a passiveSocket.
* @param host the hostname
* @param service the service
* @return true if successful, false on error (e.g. connection already established)
*/
bool setBindAddress(const TQString& host, const TQString& service);
/**
* Unsets the bind address for the socket. That means that we won't
* attempt to bind to an address before connecting.
* @return true if successful, false on error (e.g. connection already established)
*/
bool unsetBindAddress();
/**
* Sets the timeout value for the connection (if this is not passiveSocket) or
* acception (if it is). In the event the given function
* (connect or accept) returns due to time out, it's possible to call it again.
*
* Setting the timeout to 0 disables the timeout feature.
*
* @param secs the timeout length, in seconds
* @param usecs the timeout complement, in microseconds
* @return false if setting timeout makes no sense in the context.
*/
bool setTimeout(int secs, int usecs = 0);
/**
* Returns the timeout value for the connection.
* @return the timeout value. 0 if there is no timeout.
*/
timeval timeout() const;
/**
* Sets/unsets blocking mode for the socket. When non-blocking mode is enabled,
* I/O operations might return error and set errno to EWOULDBLOCK. Also,
* it's not recommended to use this when using the class signals.
*
* @param enable if true, set blocking mode. False, non-blocking mode.
* @return false on error.
*/
bool setBlockingMode(bool enable);
/**
* Returns the current blocking mode for this socket.
* @return true if in blocking mode
*/
bool blockingMode();
/**
* Sets/unsets address reusing flag for this socket.
*
* This function returns true if the value was set correctly. That is NOT
* the result of the set.
* @param enable if true, set address reusable
* @return true on success, false on failure. If the socket was not yet created,
* the value is only remembered. In this case the return value is always true.
*/
bool setAddressReusable(bool enable);
/**
* Returns whether this socket's address can be reused
* @return true if the address can be reused
*/
bool addressReusable();
/**
* Sets/unsets the v6-only flag for IPv6 sockets.
*
* When an IPv6 socket is in use, communication with IPv4 sockets is
* guaranteed by translating those IPv4 addresses into IPv6 ones
* (specifically, the v4-mapped addresses). This flag allows that
* behavior to be turned on and off.
*
* Note that this does not have any effect on sockets that are not
* IPv6 and the function will always return false in those cases.
* Also note that this flag defaults to off in order to accommodate
* existing applications.
*
* @param enable if true, no IPv4 translation will be performed;
* this socket will be restricted to IPv6 communication
* @returns true on success, false on failure.
* @see localAddress to find out if this is an IPv6 socket
*/
bool setIPv6Only(bool enable);
/**
* Returns the status of the v6-only flag for IPv6 sockets.
* @returns true if the flag is set to on; false if it is not. If this
* socket is not an IPv6 one, the return value is false.
* @see setIPv6Only
*/
bool isIPv6Only();
/**
* Sets the buffer sizes for this socket.
*
* This implementation allows any size for both parameters. The value given
* will be interpreted as the maximum size allowed for the buffers, after
* which the I/O functions will stop buffering. The value of -1 will be
* interpreted as "unlimited" size. The value of -2 means "no change".
*
* Note: changing the buffer size to 0 for any buffer will cause the given
* buffer's to be discarded. Likewise, setting the size to a value less than
* the current size will cause the buffer to be shrunk to the wanted value,
* as if the data had been read.
* @param rsize read buffer size
* @param wsize write buffer size
* @return true on success, false if this is not possible in this state (e.g. connection
* not established yet)
*/
virtual bool setBufferSize(int rsize, int wsize = -2);
/**
* Returns the local socket address
* @return the local socket address, can be 0 if the connection has not been established
* yet
*/
const ::KSocketAddress *localAddress();
/**
* Returns the peer socket address. Use KExtendedSocket::resolve() to
* resolve this to a human-readable hostname/service or port.
* @return the peer address, can be 0 if the connection has not been established yet
* or the socket is passive
*/
const ::KSocketAddress *peerAddress();
/**
* Returns the file descriptor
* @return the file descriptor. -1 if there is no fd yet.
*/
inline int fd() const
{ return sockfd; }
/*
* -- socket creation -- *
*/
/**
* Performs lookup on the addresses we were given before.
*
* This will perform lookups on the bind addresses if they were given.
* @return 0 or an error. Do not rely on the values returned by lookup
* as of now. They are not specified.
*/
virtual int lookup();
/**
* Starts an asynchronous lookup for the addresses given.
*
* When the lookup is done, the lookupReady signal will be emitted.
*
* Note that, depending on the parameters for the lookup, this function might
* know the results without the need for blocking or queuing an
* asynchronous lookup. That means that the lookupReady signal might be
* emitted by this function, so your code should be prepared for that.
*
* One such case is when noResolve flag is set.
* If this function is able to determine the results without queuing
* and the lookup failed, this function will return -1.
*
* @return 0 on success or -1 on error. Note that
* returning 0 means that either we are in the process of doing
* lookup or that it has finished already.
*/
virtual int startAsyncLookup();
/**
* Cancels any on-going asynchronous lookups
*/
virtual void cancelAsyncLookup();
/**
* Place the socket in listen mode. The parameters are the same as for
* the system listen() call.
* @param N the queue length for pending connections
* @return 0 on success, -1 on system error (errno
* available) and -2 if this is not a passiveSocket.
*/
virtual int listen(int N = 5); // 5 is arbitrary
/**
* Accepts an incoming connection from the socket. If this socket is in
* blocking mode, this function will block until a connection is received.
* Otherwise, it might return with error. The sock parameter will be
* initialised with the newly created socket.
*
* Upon successful acception (i.e., this function returns 0), the newly
* created socket will be already connected. The socket will be unbuffered
* and readyRead() and readyWrite() signals will be disabled.
*
* @param sock a pointer to an KExtendedSocket variable
* @return 0 on success, -1 on system error (errno set) and -2 if this is
* not a passiveSocket and -3 if this took too long (time out)
*/
virtual int accept(KExtendedSocket *&sock);
/**
* Attempts to connect to the remote host.
* After successful connection (return value 0), the socket will be ready
* for I/O operations. Note, however, that not all signals may be enabled
* for emission by this socket:
* @li readyRead and readyWrite signals will be enabled only if
* enableRead or enableWrite were called. You can still enable
* them by calling those functions, of course.
* @li #closed() will only be sent if we are indeed reading from the input
* stream. That is, if this socket is buffering the input. See setBufferSize
*
* Note that, in general, functions inherited/overridden from KBufferedIO will only
* work on buffered sockets, like bytesAvailable and bytesToWrite.
* @return The return values are:
* @li 0: success
* @li -1: system error, errno was set accordingly
* @li -2: this socket cannot connect(); this is a passiveSocket. It can also
* mean that the function was unable to make a connection with the given
* bind address or that an asynchronous connection attempt is already
* in progress.
* @li -3: connection timed out
*
*/
virtual int connect();
/**
* Starts an asynchronous connect. This works exactly the same as #connect,
* except that the connection result won't be returned.
*
* Note that those signals might be emitted before this function returns, so your
* code should be prepared for that condition.
*
* You must call cancelAsyncConnect() before you delete the socket if you
* call this. Otherwise you will have crashes.
*
* @return 0 on successful queuing of the connect or -1 on error.
* If this function returns 0, then the connectionSuccess() or the
* connectionFailed() signals will be emitted.
*/
virtual int startAsyncConnect();
/**
* Cancels any on-going asynchronous connection attempt.
*/
virtual void cancelAsyncConnect();
/**
* Implementation of TQIODevice::open() pure virtual function.
* This depends on the target host address already being there.
* If this is a passiveSocket, this is identical to call listen(); else, if
* this is not a passiveSocket and no connection attempt is in progress, this
* is like connect(). If one is in progress, this function will fail.
* @param mode the open mode. Must be IO_Raw | IO_ReadWrite
* @return true if successful, false when an error occurred or the most was
* not correct
*/
virtual bool open(TQ_OpenMode mode = (TQ_OpenMode)(IO_Raw | IO_ReadWrite));
/**
* Closes the socket. If we have data still in the write buffer yet to be
* sent, the socket won't be closed right now. It'll be closed after we managed
* to send everything out.
* If you want to close the socket now, you may want to call flush() first,
* and then closeNow().
*/
virtual void close();
/**
* Closes the socket now, discarding the contents of the write buffer, if any.
* The read buffer's contents are kept until they are emptied by read operations
* or the class is destroyed.
*/
virtual void closeNow();
/**
* Releases the socket and anything we have holding on it. The class cannot
* be used anymore. In other words, this is just like closeNow(), but it does
* not actually close the socket.
*
* This is useful if you just want to connect and don't need the rest of the
* class.
*
* Note that the buffers' contents will be discarded.
*
* Use of this method is discouraged, because the socket created might be such that
* normal library routines can't handle (read, write, close, etc.)
*/
virtual void release();
/*
* -- I/O --
*/
/**
* Flushes the socket buffer. You need not call this method during normal
* operation as we will try and send everything as soon as possible.
* However, if you want to make sure that data in the buffer is being sent
* at this moment, you can call this function. It will try to send as much
* data as possible, but it will stop as soon as the kernel cannot receive
* any more data, and would possibly block.
*
* By repeatedly calling this function, the behavior will be like that of
* a blocking socket. Indeed, if this function is called with the kernel not
* ready to receive data, it will block, unless this is a non-blocking socket.
*
* This function does not touch the read buffer. You can empty it by calling
* tqreadBlock() with a null destination buffer.
*/
virtual void flush();
/**
* Returns length of this socket. This call is not supported on sockets.
* @return the length of this socket, or 0 if unsupported
*/
#ifdef USE_QT3
virtual inline TQ_ULONG size() const
#endif // USE_QT3
#ifdef USE_QT4
virtual inline qint64 size() const
#endif // USE_QT4
{ return 0; }
/**
* Returns relative position from start. This call is not supported on sockets.
* @return the relative position from the start, or 0 if unsupported
*/
virtual inline TQ_ULONG at() const
{ return 0; }
/**
* Returns true if we are at position. This is not supported on sockets.
* @param i the position to check
* @return true if we art at the given position, or always true if unsupported.
*/
virtual inline bool at(int i)
{ Q_UNUSED(i);return true; }
/**
* Returns true if we are at the end. This is not supported on sockets, but
* we always are at the end in a socket...
* @return true if we are at the end. Always false if unsupported.
*/
virtual inline bool atEnd() const
{ return false; }
/**
* Reads a block of data from the socket.
*
* If the socket is not buffered, this function will simply call the underlying
* read method. This function will block if the socket is not on non-blocking mode
* (see setBlockingMode) and there is not enough data to be read in the
* Operating System yet. If we are in non-blocking operation, the call will
* fail in this case.
*
* However, if we are buffering, this function will instead read from the
* buffer while there is available data. This function will never block
* in buffering mode, which means that if you try to read while the buffers
* are empty, this function will always return -1 and set the system error to
* EWOULDBLOCK (aka EAGAIN), so as to mimic non-blocking operation.
*
* @param data where we will write the read data to
* @param maxlen maximum length of data to be read
* @return the number of bytes effectively read, or a negative number in case
* or an error. If the @p data param is not null, then this is also the number
* of bytes copied into that buffer. If the return value is different than
* @p maxlen, then this function encountered a situation in which no more
* bytes were available. Subsequent calls might cause this function to one
* of these behaviours:
* @li return an error, with EWOULDBLOCK system error, if we buffering
* or we are in non-blocking mode
* @li otherwise, it'll block
* This function returns 0, if the function detected end-of-file condition
* (socket was closed)
*/
virtual TQT_TQIO_LONG tqreadBlock(char *data, TQT_TQIO_ULONG maxlen);
/**
* Writes a block of data to the socket.
*
* If the socket is not buffered, this function will simply call the underlying
* write method. This means that the function might block if that method blocks
* as well. That situation is possible if we are not in non-blocking mode and
* the operating system buffers are full for this socket. If we are in
* non-blocking mode and the operating system buffers are full, this function
* will return -1 and the system error will be set to EWOULDBLOCK.
*
* If we are buffering, this function will simply transfer the data into the
* write buffer. This function will then always succeed, as long as there is
* enough room in the buffer. If the buffer size was limited and that limit
* is reached, this function will copy no more bytes than that limit. Trying
* to write with a full buffer will return -1 and set system error to
* EWOULDBLOCK.
*
* @param data the data to write
* @param len the length of data to write
* @return the number of bytes written from @p data buffer.
* The return value might be less than @p len if the output buffers cannot
* accommodate that many bytes and -1 in the case of an errro.
*/
virtual TQT_TQIO_LONG tqwriteBlock(const char *data, TQT_TQIO_ULONG len);
/**
* Peeks at a block of data from the socket.
*
* This is exactly like read, except that the data won't be flushed from the
* read buffer.
*
* If this socket is not buffered, this function will always return with
* 0 bytes copied.
*
* @param data where to store the data
* @param maxlen how many bytes to copy, at most
* @return the number of bytes copied. 0 does not mean end-of-file
* condition.
*/
virtual int peekBlock(char *data, uint maxlen);
/**
* Reimplementation of unreadBlock() method. This is so because unreading in
* sockets doesn't make sense, so this function will always return -1 (error)
* and set the system error to ENOSYS.
* @return always -1 (error)
*/
virtual int unreadBlock(const char *data, uint len);
/**
* Returns the number of available bytes yet to be read via readBlock
* and family of functions.
*
* Note: as of now, this only works on input-buffered sockets. This will
* change in the future
* @return The number of available bytes, or -1 on error or -2 if this call is invalid
* in the current state.
*/
#ifdef USE_QT3
virtual int bytesAvailable() const;
#endif // USE_QT3
#ifdef USE_QT4
virtual qint64 bytesAvailable() const;
#endif // USE_QT4
/**
* Waits @p msec milliseconds for more data to be available (use 0 to
* wait forever). The return value is the amount of data available for
* read in the read buffer.
*
* @param msec milliseconds to wait
* @return -1 in case of system error and -2 in case of invalid socket
* state
*/
virtual int waitForMore(int msec);
/**
* Gets a single character (unsigned char) from the stream.
* @return the value of the character. Negative if there was an error.
*/
virtual int getch();
/**
* Writes a single character (unsigned char) to the stream. All other bits
* will be ignored.
* @param ch character to write, converted to char
*/
virtual int putch(int ch);
/**
* Unreads one character from the stream. This is not possible on sockets.
* @return always returns -1 on sockets.
*/
virtual int ungetch(int)
{ return -1; }
/**
* Toggles the emission of the readyRead signal.
*
* Note that this signal is emitted every time more data is available to be
* read, so you might get flooded with it being emitted every time, when in
* non-buffered mode. However, in buffered mode, this signal will be
* emitted only when there is data coming in from the wire.
* By default, this flag is set to false, i.e., signal not being emitted.
* @param enable if true, the signal will be emitted
*/
virtual void enableRead(bool enable);
/**
* Toggles the emission of the readyWrite signal.
*
* Note that this signal is emitted only when the OS is ready to receive more
* data, which means that the write buffer is empty. And when that is reached,
* this signal will possibly be emitted on every loop, so you might
* want to disable it. By default, this flag is set to false.
* @param enable if true, the signal will be emitted
*/
virtual void enableWrite(bool enable);
signals:
/**
* This signal is emitted whenever an asynchronous lookup process is done.
* The parameter @p count tells
* @param count the number of results
*/
void lookupFinished(int count);
/**
* This signal is emitted whenever we connected asynchronously to a host.
*/
void connectionSuccess();
/**
* This signal is emitted whenever our asynchronous connection attempt
* failed to all hosts listed.
* @param error the errno code of the last connection attempt
*/
void connectionFailed(int error);
/**
* This signal is emitted whenever this socket is ready to accept another
* socket.
* @see accept()
*/
void readyAccept();
protected:
int sockfd; // file descriptor of the socket
protected slots:
void socketActivityRead();
void socketActivityWrite();
void dnsResultsReady();
void startAsyncConnectSlot();
void connectionEvent();
protected:
TQSocketNotifier *readNotifier();
TQSocketNotifier *writeNotifier();
private:
// protection against accidental use
KExtendedSocket(KExtendedSocket&);
KExtendedSocket& operator=(KExtendedSocket&);
/**
* This is actually a wrapper around getaddrinfo().
* @internal
*/
static int doLookup(const TQString& host, const TQString& serv, addrinfo& hint,
kde_addrinfo** result);
protected:
/**
* Sets the error code
*/
void setError(int errorkind, int error);
inline void cleanError()
{ setError(IO_Ok, 0); }
/**
* Sets the socket status. For derived classes only.
*/
void setSocketStatus(int status);
public:
/**
* Performs resolution on the given socket address.
*
* That is, tries to resolve the raw form of the socket address into a textual
* representation.
*
* @param sock the socket address
* @param len the length of the socket address
* @param host where the hostname will be written
* @param port where the service-port will be written
* @param flags the same flags as getnameinfo()
* @returns 0 on success, nonzero otherwise.
*/
static int resolve(sockaddr* sock, ksocklen_t len, TQString& host, TQString& port, int flags = 0) KDE_DEPRECATED;
/**
* Performs resolution on the given socket address.
*
* That is, tries to resolve the raw form of the socket address into a textual
* representation.
*
* @param sock the socket address
* @param host where the hostname will be written
* @param port where the service-port will be written
* @param flags the same flags as getnameinfo()
* @returns 0 on success, nonzero otherwise.
*/
static int resolve(::KSocketAddress* sock, TQString& host, TQString& port, int flags = 0) KDE_DEPRECATED;
/** @deprecated
* This function is now deprecated. Please use @ref KNetwork::KResolver::resolve.
*
* Performs lookup on the given hostname/port combination and returns a list
* of matching addresses.
* The error code can be transformed into string by KExtendedSocket::strError()
* with code of IO_LookupError.
*
* IMPORTANT: the result values of the TQPtrList must be deleted after use. So,
* if you don't copy the KAddressInfo objects, the best way to assure that
* is to call setAutoDelete(true) on the list right after this function
* returns. If you do copy the results out, you must assure that the objects
* get deleted when they are not needed any more.
*
* @param host the hostname to look up
* @param port the port/service to look up
* @param flags flags to be used when looking up, Flags
* @param error pointer to a variable holding the error code
* @return a list of KAddressInfos
*/
static TQPtrList<KAddressInfo> lookup(const TQString& host, const TQString& port, int flags = 0, int *error = 0) KDE_DEPRECATED;
/**
* Returns the local socket address
* Remember to delete the returned object when it is no longer needed.
* @param fd the file descriptor
* @return the local socket address or 0 if an error occurred. Delete after use.
*/
static ::KSocketAddress *localAddress(int fd) KDE_DEPRECATED;
/**
* Returns the peer socket address. Use KExtendedSocket::resolve() to
* resolve this to a human-readable hostname/service or port.
* Remember to delete the returned object when it is no longer needed.
* @param fd the file descriptor
* @return the peer socket address or 0 if an error occurred. Delete after use.
*/
static ::KSocketAddress *peerAddress(int fd) KDE_DEPRECATED;
/**
* Returns the representing text of this error code
* @param code the error code, as seen in status()
* @param syserr the system error, as from systemError()
* @return the text for the given error code
*/
static TQString strError(int code, int syserr);
/**
* Sets/unsets address reusing flag for this socket.
*
* This function returns true if the value was set correctly. That is NOT
* the result of the set.
* @param fd the file descriptor
* @param enable if true, set address reusable
* @return true on success, false on failure.
*/
static bool setAddressReusable(int fd, bool enable) KDE_DEPRECATED;
protected:
virtual void virtual_hook( int id, void* data );
private:
KExtendedSocketPrivate *d;
friend class KSocket;
friend class KServerSocket;
};
/** @deprecated
* This class is now deprecated. Please see @ref KNetwork::KResolver for the new API.
*
* Contains information about an internet address. It wraps addrinfo,
* see getaddrinfo(3) for more information.
*/
class KDECORE_EXPORT KAddressInfo
{
private:
addrinfo *ai;
::KSocketAddress *addr;
inline KAddressInfo() : ai(0), addr(0)
{ }
// KAddressInfo(addrinfo *ai);
KAddressInfo(KAddressInfo&) { }
KAddressInfo& operator=(KAddressInfo&) { return *this; }
public:
~KAddressInfo();
/**
* Returns the KAddressInfo's KSocketAddress.
* Only valid as long as the KAddressInfo exists.
*/
inline KDE_DEPRECATED operator const ::KSocketAddress*() const
{ return addr; }
/**
* Returns the KAddressInfo's addrinfo.
*/
inline KDE_DEPRECATED operator const addrinfo&() const
{ return *ai; }
/**
* Returns a pointer to KAddressInfo's addrinfo.
* Only valid as long as the KAddressInfo exists.
*/
inline KDE_DEPRECATED operator const addrinfo*() const
{ return ai; }
/**
* Returns the KAddressInfo's KSocketAddress.
* Only valid as long as the KAddressInfo exists.
* @return the KAddressInfo's KSocketAddress.
*/
inline KDE_DEPRECATED const ::KSocketAddress* address() const
{ return addr; }
/**
* Returns the flags of the address info (see getaddrinfo(3)).
* @return the flags of the addres info.
*/
int flags() const KDE_DEPRECATED;
/**
* Returns the family of the address info (see getaddrinfo(3)).
* @return the family of the addres info.
*/
int family() const KDE_DEPRECATED;
/**
* Returns the socket type of the address info (see getaddrinfo(3)).
* @return the socket type of the addres info.
*/
int socktype() const KDE_DEPRECATED;
/**
* Returns the protocol of the address info (see getaddrinfo(3)).
* @return the protocol of the addres info.
*/
int protocol() const KDE_DEPRECATED;
/**
* Returns the official name of the host (see getaddrinfo(3)).
* Only valid as long as the KAddressInfo exists.
* @return the official name of the host
*/
const char* canonname() const KDE_DEPRECATED;
/**
* Returns the length of the KSocketAddress.
* @return the KSocketAddress's length
*/
inline int length() const
{ if (addr) return addr->size(); return 0; }
friend class KExtendedSocket;
};
#endif //Q_OS_UNIX
#endif // KEXTSOCK_H
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