+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+%% Name: socket.tex
+%% Purpose: wxSocket docs
+%% Author: Guillermo Rodriguez Garcia <guille@iies.es>
+%% Modified by:
+%% Created: 1999
+%% RCS-ID: $Id$
+%% Copyright: (c) wxWidgets team
+%% License: wxWindows license
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+
\section{\class{wxSocketBase}}\label{wxsocketbase}
+wxSocketBase is the base class for all socket-related objects, and it
+defines all basic IO functionality.
+
+Note: (Workaround for implementation limitation for wxWidgets up to 2.5.x)
+If you want to use sockets or derived classes such as wxFTP in a secondary thread,
+call wxSocketBase::Initialize() (undocumented) from the main thread before creating
+any sockets - in wxApp::OnInit for example.
+See http://wiki.wxwidgets.org/wiki.pl?WxSocket or
+http://www.litwindow.com/knowhow/knowhow.html for more details.
+
\wxheading{Derived from}
-\helpref{wxEvtHandler}{wxevthandler}
+\helpref{wxObject}{wxobject}
\wxheading{Include files}
\begin{twocollist}\itemsep=0pt
\twocolitem{{\bf wxSOCKET\_INPUT}}{There is data available for reading.}
\twocolitem{{\bf wxSOCKET\_OUTPUT}}{The socket is ready to be written to.}
-\twocolitem{{\bf wxSOCKET\_CONNECTION}}{Incoming connection (server), or connection establishment (client).}
+\twocolitem{{\bf wxSOCKET\_CONNECTION}}{Incoming connection request (server), or successful connection establishment (client).}
\twocolitem{{\bf wxSOCKET\_LOST}}{The connection has been closed.}
\end{twocollist}
available for reading. This will be the case if the input queue was
empty and new data arrives, or if the application has read some data
yet there is still more data available. This means that the application
-does not need to read all available data in response to a
+does not need to read all available data in response to a
{\bf wxSOCKET\_INPUT} event, as more events will be produced as
necessary.
The {\bf wxSOCKET\_OUTPUT} event is issued when a socket is first
-connected with Connect or accepted with Accept. After that, new
+connected with \helpref{Connect}{wxsocketclientconnect} or accepted
+with \helpref{Accept}{wxsocketserveraccept}. After that, new
events will be generated only after an output operation fails
with {\bf wxSOCKET\_WOULDBLOCK} and buffer space becomes available
again. This means that the application should assume that it
-can write data to the socket until an {\bf wxSOCKET\_WOULDBLOCK}
+can write data to the socket until an {\bf wxSOCKET\_WOULDBLOCK}
error occurs; after this, whenever the socket becomes writable
-again the application will be notified with another
+again the application will be notified with another
{\bf wxSOCKET\_OUTPUT} event.
The {\bf wxSOCKET\_CONNECTION} event is issued when a delayed connection
-request completes succesfully (client) or when a new connection arrives
+request completes successfully (client) or when a new connection arrives
at the incoming queue (server).
The {\bf wxSOCKET\_LOST} event is issued when a close indication is
received for the socket. This means that the connection broke down or
that it was closed by the peer. Also, this event will be issued if
-a delayed connection request fails.
+a connection request fails.
-% ---------------------------------------------------------------------------
-% Event handling
-% ---------------------------------------------------------------------------
\wxheading{Event handling}
-To process events from a socket, use the following event handler macro to direct
-input to member functions that take a \helpref{wxSocketEvent}{wxsocketevent} argument.
+To process events coming from a socket object, use the following event
+handler macro to direct events to member functions that take
+a \helpref{wxSocketEvent}{wxsocketevent} argument.
\twocolwidtha{7cm}%
\begin{twocollist}\itemsep=0pt
-\twocolitem{{\bf EVT\_SOCKET(id, func)}}{A socket event occured.}
+\twocolitem{{\bf EVT\_SOCKET(id, func)}}{Process a wxEVT\_SOCKET event.}
\end{twocollist}
-% ---------------------------------------------------------------------------
-% See also ...
-% ---------------------------------------------------------------------------
\wxheading{See also}
\helpref{wxSocketEvent}{wxsocketevent},
\helpref{wxSocketClient}{wxsocketclient},
-\helpref{wxSocketServer}{wxsocketserver}
+\helpref{wxSocketServer}{wxsocketserver},
+\helpref{Sockets sample}{samplesockets}
% ---------------------------------------------------------------------------
-% Members
+% Function groups
% ---------------------------------------------------------------------------
-\latexignore{\rtfignore{\wxheading{Members}}}
-\membersection{wxSocketBase::wxSocketBase}
+\latexignore{\rtfignore{\wxheading{Function groups}}}
-\func{}{wxSocketBase}{\void}
+\membersection{Construction and destruction}\label{socketconstruction}
-Default constructor. Don't use it; use \helpref{wxSocketClient}{wxsocketclient}
-or \helpref{wxSocketServer}{wxsocketserver}.
+\helpref{wxSocketBase}{wxsocketbaseconstruct}\\
+\helpref{\destruct{wxSocketBase}}{wxsocketbasedestruct}\\
+\helpref{Destroy}{wxsocketbasedestroy}
-\membersection{wxSocketBase::\destruct{wxSocketBase}}
+\membersection{Socket state}\label{socketstate}
-\func{}{\destruct{wxSocketBase}}{\void}
+Functions to retrieve current state and miscellaneous info.
+
+\helpref{Error}{wxsocketbaseerror}\\
+\helpref{GetLocal}{wxsocketbasegetlocal}\\
+\helpref{GetPeer}{wxsocketbasegetpeer}
+\helpref{IsConnected}{wxsocketbaseisconnected}\\
+\helpref{IsData}{wxsocketbaseisdata}\\
+\helpref{IsDisconnected}{wxsocketbaseisdisconnected}\\
+\helpref{LastCount}{wxsocketbaselastcount}\\
+\helpref{LastError}{wxsocketbaselasterror}\\
+\helpref{Ok}{wxsocketbaseok}\\
+\helpref{SaveState}{wxsocketbasesavestate}\\
+\helpref{RestoreState}{wxsocketbaserestorestate}
+
+\membersection{Basic IO}\label{socketbasicio}
+
+Functions that perform basic IO functionality.
+
+\helpref{Close}{wxsocketbaseclose}\\
+\helpref{Discard}{wxsocketbasediscard}\\
+\helpref{Peek}{wxsocketbasepeek}\\
+\helpref{Read}{wxsocketbaseread}\\
+\helpref{ReadMsg}{wxsocketbasereadmsg}\\
+\helpref{Unread}{wxsocketbaseunread}\\
+\helpref{Write}{wxsocketbasewrite}\\
+\helpref{WriteMsg}{wxsocketbasewritemsg}
+
+Functions that perform a timed wait on a certain IO condition.
+
+\helpref{InterruptWait}{wxsocketbaseinterruptwait}\\
+\helpref{Wait}{wxsocketbasewait}\\
+\helpref{WaitForLost}{wxsocketbasewaitforlost}\\
+\helpref{WaitForRead}{wxsocketbasewaitforread}\\
+\helpref{WaitForWrite}{wxsocketbasewaitforwrite}\\
+
+and also:
+
+\helpref{wxSocketServer::WaitForAccept}{wxsocketserverwaitforaccept}\\
+\helpref{wxSocketClient::WaitOnConnect}{wxsocketclientwaitonconnect}
+
+Functions that allow applications to customize socket IO as needed.
+
+\helpref{GetFlags}{wxsocketbasegetflags}\\
+\helpref{SetFlags}{wxsocketbasesetflags}\\
+\helpref{SetTimeout}{wxsocketbasesettimeout}\\
+\helpref{SetLocal}{wxsocketbasesetlocal}\\
+
+\membersection{Handling socket events}\label{socketevents}
+
+Functions that allow applications to receive socket events.
+
+\helpref{Notify}{wxsocketbasenotify}\\
+\helpref{SetNotify}{wxsocketbasesetnotify}\\
+\helpref{GetClientData}{wxsocketbasegetclientdata}\\
+\helpref{SetClientData}{wxsocketbasesetclientdata}\\
+\helpref{SetEventHandler}{wxsocketbaseseteventhandler}
-Destroys the wxSocketBase object.
% ---------------------------------------------------------------------------
-% State functions
+% Members here
% ---------------------------------------------------------------------------
+\helponly{\insertatlevel{2}{
+
+\wxheading{Members}
+
+}}
+
+\membersection{wxSocketBase::wxSocketBase}\label{wxsocketbaseconstruct}
+
+\func{}{wxSocketBase}{\void}
+
+Default constructor. Don't use it directly; instead, use
+\helpref{wxSocketClient}{wxsocketclient} to construct a socket client, or
+\helpref{wxSocketServer}{wxsocketserver} to construct a socket server.
+
+\membersection{wxSocketBase::\destruct{wxSocketBase}}\label{wxsocketbasedestruct}
+
+\func{}{\destruct{wxSocketBase}}{\void}
+
+Destructor. Do not destroy a socket using the delete operator directly;
+use \helpref{Destroy}{wxsocketbasedestroy} instead. Also, do not create
+socket objects in the stack.
+
+
%
-% SetFlags
+% Close
%
+\membersection{wxSocketBase::Close}\label{wxsocketbaseclose}
-\membersection{wxSocketBase::SetFlags}\label{wxsocketbasesetflags}
+\func{void}{Close}{\void}
-\func{void}{SetFlags}{\param{wxSocketBase::wxSockFlags}{ flags}}
+This function shuts down the socket, disabling further transmission and
+reception of data; it also disables events for the socket and frees the
+associated system resources. Upon socket destruction, Close is automatically
+called, so in most cases you won't need to do it yourself, unless you
+explicitly want to shut down the socket, typically to notify the peer
+that you are closing the connection.
-\twocolwidtha{7cm}
-\begin{twocollist}\itemsep=0pt
-\twocolitem{{\bf wxSOCKET\_NONE}}{Normal functionality.}
-\twocolitem{{\bf wxSOCKET\_NOWAIT}}{Read/write as much data as possible and return immediately.}
-\twocolitem{{\bf wxSOCKET\_WAITALL}}{Wait for all required data to be read/written unless an error occurs.}
-\twocolitem{{\bf wxSOCKET\_BLOCK}}{Block the GUI (do not wxYield) while reading/writing data.}
-\end{twocollist}
+\wxheading{Remark/Warning}
-A brief overview on how to use these flags follows.
+Although Close immediately disables events for the socket, it is possible
+that event messages may be waiting in the application's event queue. The
+application must therefore be prepared to handle socket event messages
+even after calling Close.
-If no flag is specified (this is the same as {\bf wxSOCKET\_NONE}),
-IO calls will return after some data has been read or written, even
-when the transfer might not be complete. This is the same as issuing
-exactly one blocking low-level call to recv() or send(). Note that
-blocking here refers to when the function returns, not to whether
-the GUI blocks during this time.
+%
+% Destroy
+%
+\membersection{wxSocketBase::Destroy}\label{wxsocketbasedestroy}
-If {\bf wxSOCKET\_NOWAIT} is specified, IO calls will return immediately.
-Read operations will retrieve only available data. Write operations will
-write as much data as possible, depending on how much space is available
-in the output buffer. This is the same as issuing exactly one nonblocking
-low-level call to recv() or send(). Note that nonblocking here refers to
-when the function returns, not to whether the GUI blocks during this time.
+\func{bool}{Destroy}{\void}
-If {\bf wxSOCKET\_WAITALL} is specified, IO calls won't return until ALL
-the data has been read or written (or until an error occurs), blocking if
-necessary, and issuing several low level calls if necessary. This is the
-same as having a loop which makes as many blocking low-level calls to
-recv() or send() as needed so as to transfer all the data. Note that
-"blocking" here refers to when the function returns, not to whether
-the GUI blocks during this time.
+Destroys the socket safely. Use this function instead of the delete operator,
+since otherwise socket events could reach the application even after the
+socket has been destroyed. To prevent this problem, this function appends
+the wxSocket to a list of object to be deleted on idle time, after all
+events have been processed. For the same reason, you should avoid creating
+socket objects in the stack.
-The {\bf wxSOCKET\_BLOCK} flag controls whether the GUI blocks during
-IO operations. If this flag is not used, then the application must take
-extra care to avoid unwanted reentrance.
+Destroy calls \helpref{Close}{wxsocketbaseclose} automatically.
-So:
+\wxheading{Return value}
-{\bf wxSOCKET\_NONE} will try to read at least SOME data, no matter how much.
+Always true.
-{\bf wxSOCKET\_NOWAIT} will always return immediately, even if it cannot
-read or write ANY data.
+%
+% Discard
+%
+\membersection{wxSocketBase::Discard}\label{wxsocketbasediscard}
-{\bf wxSOCKET\_WAITALL} will only return when it has read or written ALL
-the data.
+\func{wxSocketBase\&}{Discard}{\void}
-{\bf wxSOCKET\_BLOCK} has nothing to do with the previous flags and
-it controls whether the GUI blocks.
+This function simply deletes all bytes in the incoming queue. This function
+always returns immediately and its operation is not affected by IO flags.
+
+Use \helpref{LastCount}{wxsocketbaselastcount} to verify the number of bytes actually discarded.
+
+If you use \helpref{Error}{wxsocketbaseerror}, it will always return false.
%
-% SetNotify
+% Error
%
-\membersection{wxSocketBase::SetNotify}\label{wxsocketbasesetnotify}
+\membersection{wxSocketBase::Error}\label{wxsocketbaseerror}
-\func{void}{SetNotify}{\param{wxSocketEventFlags}{ flags}}
+\constfunc{bool}{Error}{\void}
-SetNotify specifies which socket events are to be sent to the event handler.
-The {\it flags} parameter is a combination of flags ORed toghether. The
-following flags can be used:
+Returns true if an error occurred in the last IO operation.
-\twocolwidtha{7cm}
-\begin{twocollist}\itemsep=0pt
-\twocolitem{{\bf wxSOCKET\_INPUT\_FLAG}}{to receive wxSOCKET\_INPUT}
-\twocolitem{{\bf wxSOCKET\_OUTPUT\_FLAG}}{to receive wxSOCKET\_OUTPUT}
-\twocolitem{{\bf wxSOCKET\_CONNECTION\_FLAG}}{to receive wxSOCKET\_CONNECTION}
-\twocolitem{{\bf wxSOCKET\_LOST\_FLAG}}{to receive wxSOCKET\_LOST}
-\end{twocollist}
+Use this function to check for an error condition after one of the
+following calls: Discard, Peek, Read, ReadMsg, Unread, Write, WriteMsg.
-For example:
-
-\begin{verbatim}
- sock.SetNotify(wxSOCKET_INPUT_FLAG | wxSOCKET_LOST_FLAG);
-\end{verbatim}
+%
+% GetClientData
+%
+\membersection{wxSocketBase::GetClientData}\label{wxsocketbasegetclientdata}
-In this example, the user will be notified about incoming socket data and
-whenever the connection is closed.
+\constfunc{void *}{GetClientData}{\void}
-For more information on socket events see \helpref{wxSocket events}{wxsocketbase}.
+Returns a pointer of the client data for this socket, as set with
+\helpref{SetClientData}{wxsocketbasesetclientdata}
%
-% SetTimeout
+% GetLocal
%
-\membersection{wxSocketBase::SetTimeout}\label{wxsocketbasesettimeout}
+\membersection{wxSocketBase::GetLocal}\label{wxsocketbasegetlocal}
-\func{void}{SetTimeout}{\param{int }{seconds}}
+\constfunc{bool}{GetLocal}{\param{wxSockAddress\& }{addr}}
+
+This function returns the local address field of the socket. The local
+address field contains the complete local address of the socket (local
+address, local port, ...).
-This function sets the default socket timeout in seconds. This
-timeout applies to IO calls, and also to Wait() functions if you
-don't specify a wait interval. If you never use SetTimeout(), the
-default timeout will be 10 minutes.
+\wxheading{Return value}
+
+true if no error happened, false otherwise.
%
-% Notify
+% GetFlags
%
-\membersection{wxSocketBase::Notify}\label{wxsocketbasenotify}
+\membersection{wxSocketBase::GetFlags}\label{wxsocketbasegetflags}
-\func{void}{Notify}{\param{bool}{ notify}}
+\constfunc{wxSocketFlags}{GetFlags}{\void}
-Notify will enable (notify is TRUE) or disable (notify is FALSE) the propagation
-of socket events.
+Returns current IO flags, as set with \helpref{SetFlags}{wxsocketbasesetflags}
-%
-% Ok
%
+% GetPeer
+%
+\membersection{wxSocketBase::GetPeer}\label{wxsocketbasegetpeer}
-\membersection{wxSocketBase::Ok}\label{wxsocketbaseok}
+\constfunc{bool}{GetPeer}{\param{wxSockAddress\& }{addr}}
-\constfunc{bool}{Ok}{\void}
+This function returns the peer address field of the socket. The peer
+address field contains the complete peer host address of the socket
+(address, port, ...).
-Returns TRUE if the socket is initialized and ready and FALSE in other
-cases.
+\wxheading{Return value}
-\membersection{wxSocketBase::Error}\label{wxsocketbaseerror}
+true if no error happened, false otherwise.
-\constfunc{bool}{Error}{\void}
+%
+% InterruptWait
+%
+\membersection{wxSocketBase::InterruptWait}\label{wxsocketbaseinterruptwait}
-Returns TRUE if an error occured in the last IO operation.
+\func{void}{InterruptWait}{\void}
-The following operations update the Error() status:
-Read, Write, ReadMsg, WriteMsg, Peek, Unread, Discard.
+Use this function to interrupt any wait operation currently in progress.
+Note that this is not intended as a regular way to interrupt a Wait call,
+but only as an escape mechanism for exceptional situations where it is
+absolutely necessary to use it, for example to abort an operation due to
+some exception or abnormal problem. InterruptWait is automatically called
+when you \helpref{Close}{wxsocketbaseclose} a socket (and thus also upon
+socket destruction), so you don't need to use it in these cases.
-\membersection{wxSocketBase::IsConnected}\label{wxsocketbaseconnected}
+\helpref{wxSocketBase::Wait}{wxsocketbasewait},
+\helpref{wxSocketServer::WaitForAccept}{wxsocketserverwaitforaccept},
+\helpref{wxSocketBase::WaitForLost}{wxsocketbasewaitforlost},
+\helpref{wxSocketBase::WaitForRead}{wxsocketbasewaitforread},
+\helpref{wxSocketBase::WaitForWrite}{wxsocketbasewaitforwrite},
+\helpref{wxSocketClient::WaitOnConnect}{wxsocketclientwaitonconnect}
+
+%
+% IsConnected
+%
+\membersection{wxSocketBase::IsConnected}\label{wxsocketbaseisconnected}
\constfunc{bool}{IsConnected}{\void}
-Returns TRUE if the socket is connected.
+Returns true if the socket is connected.
+%
+% IsData
+%
\membersection{wxSocketBase::IsData}\label{wxsocketbaseisdata}
\constfunc{bool}{IsData}{\void}
-Returns TRUE if there is data available to be read.
+This function waits until the socket is readable. This might mean that
+queued data is available for reading or, for streamed sockets, that
+the connection has been closed, so that a read operation will complete
+immediately without blocking (unless the {\bf wxSOCKET\_WAITALL} flag
+is set, in which case the operation might still block).
-\membersection{wxSocketBase::IsDisconnected}\label{wxsocketbasedisconnected}
+\membersection{wxSocketBase::IsDisconnected}\label{wxsocketbaseisdisconnected}
+%
+% IsDisconnected
+%
\constfunc{bool}{IsDisconnected}{\void}
-Returns TRUE if the socket is disconnected.
-
-\membersection{wxSocketBase::IsNoWait}\label{wxsocketbasenowait}
-
-\constfunc{bool}{IsNoWait}{\void}
-
-Returns TRUE if the socket mustn't wait.
+Returns true if the socket is not connected.
\membersection{wxSocketBase::LastCount}\label{wxsocketbaselastcount}
+%
+% LastCount
+%
\constfunc{wxUint32}{LastCount}{\void}
Returns the number of bytes read or written by the last IO call.
-The following operations update the LastCount() value:
-Read, Write, ReadMsg, WriteMsg, Peek, Unread, Discard.
+Use this function to get the number of bytes actually transferred
+after using one of the following IO calls: Discard, Peek, Read,
+ReadMsg, Unread, Write, WriteMsg.
+%
+% LastError
+%
\membersection{wxSocketBase::LastError}\label{wxsocketbaselasterror}
\constfunc{wxSocketError}{LastError}{\void}
Returns the last wxSocket error. See \helpref{wxSocket errors}{wxsocketbase}.
Please note that this function merely returns the last error code,
-but it should not be used to determine if an error has occured (this
+but it should not be used to determine if an error has occurred (this
is because successful operations do not change the LastError value).
-Use Error, instead of LastError, to determine if the last IO call
-failed. If Error returns TRUE, use LastError to discover the
-cause of the error.
+Use \helpref{Error}{wxsocketbaseerror} first, in order to determine
+if the last IO call failed. If this returns true, use LastError
+to discover the cause of the error.
-% ---------------------------------------------------------------------------
-% IO calls
-% ---------------------------------------------------------------------------
%
-% Peek
+% Notify
%
-\membersection{wxSocketBase::Peek}\label{wxsocketbasepeek}
+\membersection{wxSocketBase::Notify}\label{wxsocketbasenotify}
-\func{wxSocketBase\&}{Peek}{\param{char *}{ buffer}, \param{wxUint32}{ nbytes}}
+\func{void}{Notify}{\param{bool}{ notify}}
-This function peeks a buffer of {\it nbytes} bytes from the socket.
-Peeking a buffer doesn't delete it from the socket input queue.
+According to the {\it notify} value, this function enables
+or disables socket events. If {\it notify} is true, the events
+configured with \helpref{SetNotify}{wxsocketbasesetnotify} will
+be sent to the application. If {\it notify} is false; no events
+will be sent.
-Use LastCount to verify the number of bytes actually peeked.
+%
+% Ok
+%
+\membersection{wxSocketBase::Ok}\label{wxsocketbaseok}
-Use Error to determine if the operation succeeded.
+\constfunc{bool}{Ok}{\void}
-\wxheading{Parameters}
+Returns true if the socket is initialized and ready and false in other
+cases.
-\docparam{buffer}{Buffer where to put peeked data.}
+\wxheading{Remark/Warning}
-\docparam{nbytes}{Number of bytes.}
+For \helpref{wxSocketClient}{wxsocketclient}, Ok won't return true unless
+the client is connected to a server.
-\wxheading{Return value}
+For \helpref{wxSocketServer}{wxsocketserver}, Ok will return true if the
+server could bind to the specified address and is already listening for
+new connections.
-Returns a reference to the current object.
+Ok does not check for IO errors;
+use \helpref{Error}{wxsocketbaseerror} instead for that purpose.
-\wxheading{Remark/Warning}
+%
+% RestoreState
+%
+\membersection{wxSocketBase::RestoreState}\label{wxsocketbaserestorestate}
-The exact behaviour of wxSocketBase::Peek() depends on the combination
-of flags being used. For a detailed explanation, see \helpref{wxSocketBase::SetFlags}{wxsocketbasesetflags}
+\func{void}{RestoreState}{\void}
+
+This function restores the previous state of the socket, as saved
+with \helpref{SaveState}{wxsocketbasesavestate}
+
+Calls to SaveState and RestoreState can be nested.
\wxheading{See also}
-\helpref{wxSocketBase::Error}{wxsocketbaseerror},
-\helpref{wxSocketBase::LastError}{wxsocketbaselasterror},
-\helpref{wxSocketBase::LastCount}{wxsocketbaselastcount},
-\helpref{wxSocketBase::SetFlags}{wxsocketbasesetflags}
+\helpref{wxSocketBase::SaveState}{wxsocketbasesavestate}
%
-% Read
+% SaveState
%
-\membersection{wxSocketBase::Read}\label{wxsocketbaseread}
+\membersection{wxSocketBase::SaveState}\label{wxsocketbasesavestate}
-\func{wxSocketBase\&}{Read}{\param{char *}{ buffer}, \param{wxUint32}{ nbytes}}
+\func{void}{SaveState}{\void}
-This function reads a buffer of {\it nbytes} bytes from the socket.
+This function saves the current state of the socket in a stack. Socket
+state includes flags, as set with \helpref{SetFlags}{wxsocketbasesetflags},
+event mask, as set with \helpref{SetNotify}{wxsocketbasesetnotify} and
+\helpref{Notify}{wxsocketbasenotify}, user data, as set with
+\helpref{SetClientData}{wxsocketbasesetclientdata}.
+
+Calls to SaveState and RestoreState can be nested.
+
+\wxheading{See also}
+
+\helpref{wxSocketBase::RestoreState}{wxsocketbaserestorestate}
+
+%
+% SetClientData
+%
+\membersection{wxSocketBase::SetClientData}\label{wxsocketbasesetclientdata}
+
+\func{void}{SetClientData}{\param{void *}{data}}
+
+Sets user-supplied client data for this socket. All socket events will
+contain a pointer to this data, which can be retrieved with
+the \helpref{wxSocketEvent::GetClientData}{wxsocketeventgetclientdata} function.
+
+%
+% SetEventHandler
+%
+\membersection{wxSocketBase::SetEventHandler}\label{wxsocketbaseseteventhandler}
-Use LastCount to verify the number of bytes actually read.
+\func{void}{SetEventHandler}{\param{wxEvtHandler\&}{ handler}, \param{int}{ id = -1}}
-Use Error to determine if the operation succeeded.
+Sets an event handler to be called when a socket event occurs. The
+handler will be called for those events for which notification is
+enabled with \helpref{SetNotify}{wxsocketbasesetnotify} and
+\helpref{Notify}{wxsocketbasenotify}.
\wxheading{Parameters}
-\docparam{buffer}{Buffer where to put read data.}
+\docparam{handler}{Specifies the event handler you want to use.}
-\docparam{nbytes}{Number of bytes.}
+\docparam{id}{The id of socket event.}
-\wxheading{Return value}
+\wxheading{See also}
-Returns a reference to the current object.
+\helpref{wxSocketBase::SetNotify}{wxsocketbasesetnotify},
+\helpref{wxSocketBase::Notify}{wxsocketbasenotify},
+\helpref{wxSocketEvent}{wxsocketevent},
+\helpref{wxEvtHandler}{wxevthandler}
-\wxheading{Remark/Warning}
+%
+% SetFlags
+%
+\membersection{wxSocketBase::SetFlags}\label{wxsocketbasesetflags}
-The exact behaviour of wxSocketBase::Read() depends on the combination
-of flags being used. For a detailed explanation, see \helpref{wxSocketBase::SetFlags}{wxsocketbasesetflags}.
+\func{void}{SetFlags}{\param{wxSocketFlags}{ flags}}
+
+Use SetFlags to customize IO operation for this socket.
+The {\it flags} parameter may be a combination of flags ORed together.
+The following flags can be used:
+
+\twocolwidtha{7cm}
+\begin{twocollist}\itemsep=0pt
+\twocolitem{{\bf wxSOCKET\_NONE}}{Normal functionality.}
+\twocolitem{{\bf wxSOCKET\_NOWAIT}}{Read/write as much data as possible and return immediately.}
+\twocolitem{{\bf wxSOCKET\_WAITALL}}{Wait for all required data to be read/written unless an error occurs.}
+\twocolitem{{\bf wxSOCKET\_BLOCK}}{Block the GUI (do not yield) while reading/writing data.}
+\twocolitem{{\bf wxSOCKET\_REUSEADDR}}{Allows the use of an in-use port (wxServerSocket only)}
+\end{twocollist}
+
+A brief overview on how to use these flags follows.
+
+If no flag is specified (this is the same as {\bf wxSOCKET\_NONE}),
+IO calls will return after some data has been read or written, even
+when the transfer might not be complete. This is the same as issuing
+exactly one blocking low-level call to recv() or send(). Note
+that {\it blocking} here refers to when the function returns, not
+to whether the GUI blocks during this time.
+
+If {\bf wxSOCKET\_NOWAIT} is specified, IO calls will return immediately.
+Read operations will retrieve only available data. Write operations will
+write as much data as possible, depending on how much space is available
+in the output buffer. This is the same as issuing exactly one nonblocking
+low-level call to recv() or send(). Note that {\it nonblocking} here
+refers to when the function returns, not to whether the GUI blocks during
+this time.
+
+If {\bf wxSOCKET\_WAITALL} is specified, IO calls won't return until ALL
+the data has been read or written (or until an error occurs), blocking if
+necessary, and issuing several low level calls if necessary. This is the
+same as having a loop which makes as many blocking low-level calls to
+recv() or send() as needed so as to transfer all the data. Note
+that {\it blocking} here refers to when the function returns, not
+to whether the GUI blocks during this time.
+
+The {\bf wxSOCKET\_BLOCK} flag controls whether the GUI blocks during
+IO operations. If this flag is specified, the socket will not yield
+during IO calls, so the GUI will remain blocked until the operation
+completes. If it is not used, then the application must take extra
+care to avoid unwanted reentrance.
+
+The {\bf wxSOCKET\_REUSEADDR} flag controls the use of the SO\_REUSEADDR standard
+setsockopt() flag. This flag allows the socket to bind to a port that is already in use.
+This is mostly used on UNIX-based systems to allow rapid starting and stopping of a server -
+otherwise you may have to wait several minutes for the port to become available.
+wxSOCKET\_REUSEADDR can also be used with socket clients to (re)bind to a particular local port
+for an outgoing connection.
+This option can have surprising platform dependent behavior, so check the documentation for
+your platform's implementation of setsockopt(). Note that on BSD-based systems (e.g. Mac OS X),
+use of wxSOCKET\_REUSEADDR implies SO\_REUSEPORT in addition to SO\_REUSEADDR to be consistent
+with Windows.
+
+So:
+
+{\bf wxSOCKET\_NONE} will try to read at least SOME data, no matter how much.
+
+{\bf wxSOCKET\_NOWAIT} will always return immediately, even if it cannot
+read or write ANY data.
+
+{\bf wxSOCKET\_WAITALL} will only return when it has read or written ALL
+the data.
+
+{\bf wxSOCKET\_BLOCK} has nothing to do with the previous flags and
+it controls whether the GUI blocks.
+
+{\bf wxSOCKET\_REUSEADDR} controls special platform-specific behavior for
+reusing local addresses/ports.
+
+%
+% SetLocal
+%
+\membersection{wxSocketBase::SetLocal}\label{wxsocketbasesetlocal}
+
+\func{bool}{SetLocal}{\param{wxIPV4address\&}{ local}}
+
+This function allows you to set the local address and port,
+useful when an application needs to reuse a particular port. When
+a local port is set for a \helpref{wxSocketClient}{wxsocketclient},
+{\bf bind} will be called before {\bf connect}.
+
+%
+% SetNotify
+%
+\membersection{wxSocketBase::SetNotify}\label{wxsocketbasesetnotify}
+
+\func{void}{SetNotify}{\param{wxSocketEventFlags}{ flags}}
+
+SetNotify specifies which socket events are to be sent to the event handler.
+The {\it flags} parameter may be combination of flags ORed together. The
+following flags can be used:
+
+\twocolwidtha{7cm}
+\begin{twocollist}\itemsep=0pt
+\twocolitem{{\bf wxSOCKET\_INPUT\_FLAG}}{to receive wxSOCKET\_INPUT}
+\twocolitem{{\bf wxSOCKET\_OUTPUT\_FLAG}}{to receive wxSOCKET\_OUTPUT}
+\twocolitem{{\bf wxSOCKET\_CONNECTION\_FLAG}}{to receive wxSOCKET\_CONNECTION}
+\twocolitem{{\bf wxSOCKET\_LOST\_FLAG}}{to receive wxSOCKET\_LOST}
+\end{twocollist}
+
+For example:
+
+\begin{verbatim}
+ sock.SetNotify(wxSOCKET_INPUT_FLAG | wxSOCKET_LOST_FLAG);
+ sock.Notify(true);
+\end{verbatim}
+
+In this example, the user will be notified about incoming socket data and
+whenever the connection is closed.
+
+For more information on socket events see \helpref{wxSocket events}{wxsocketbase}.
+
+%
+% SetTimeout
+%
+\membersection{wxSocketBase::SetTimeout}\label{wxsocketbasesettimeout}
-\wxheading{See also}
+\func{void}{SetTimeout}{\param{int }{seconds}}
-\helpref{wxSocketBase::Error}{wxsocketbaseerror},
-\helpref{wxSocketBase::LastError}{wxsocketbaselasterror},
-\helpref{wxSocketBase::LastCount}{wxsocketbaselastcount},
-\helpref{wxSocketBase::SetFlags}{wxsocketbasesetflags}
+This function sets the default socket timeout in seconds. This timeout
+applies to all IO calls, and also to the \helpref{Wait}{wxsocketbasewait} family
+of functions if you don't specify a wait interval. Initially, the default
+timeout is 10 minutes.
%
-% Write
+% Peek
%
-\membersection{wxSocketBase::Write}\label{wxsocketbasewrite}
+\membersection{wxSocketBase::Peek}\label{wxsocketbasepeek}
-\func{wxSocketBase\&}{Write}{\param{const char *}{ buffer}, \param{wxUint32}{ nbytes}}
+\func{wxSocketBase\&}{Peek}{\param{void *}{ buffer}, \param{wxUint32}{ nbytes}}
-This function writes a buffer of {\it nbytes} bytes to the socket.
+This function peeks a buffer of {\it nbytes} bytes from the socket.
+Peeking a buffer doesn't delete it from the socket input queue.
-Use LastCount to verify the number of bytes actually written.
+Use \helpref{LastCount}{wxsocketbaselastcount} to verify the number of bytes actually peeked.
-Use Error to determine if the operation succeeded.
+Use \helpref{Error}{wxsocketbaseerror} to determine if the operation succeeded.
\wxheading{Parameters}
-\docparam{buffer}{Buffer with the data to be sent.}
+\docparam{buffer}{Buffer where to put peeked data.}
\docparam{nbytes}{Number of bytes.}
\wxheading{Remark/Warning}
-The exact behaviour of wxSocketBase::Write() depends on the combination
-of flags being used. For a detailed explanation, see \helpref{wxSocketBase::SetFlags}{wxsocketbasesetflags}.
+The exact behaviour of wxSocketBase::Peek depends on the combination
+of flags being used. For a detailed explanation, see \helpref{wxSocketBase::SetFlags}{wxsocketbasesetflags}
\wxheading{See also}
\helpref{wxSocketBase::SetFlags}{wxsocketbasesetflags}
%
-% WriteMsg
+% Read
%
-\membersection{wxSocketBase::WriteMsg}\label{wxsocketbasewritemsg}
+\membersection{wxSocketBase::Read}\label{wxsocketbaseread}
-\func{wxSocketBase\&}{WriteMsg}{\param{const char *}{ buffer}, \param{wxUint32}{ nbytes}}
+\func{wxSocketBase\&}{Read}{\param{void *}{ buffer}, \param{wxUint32}{ nbytes}}
-This function writes a buffer of {\it nbytes} bytes from the socket, but it
-writes a short header before so that ReadMsg knows how much data should it
-actually read. So, a buffer sent with WriteMsg {\bf must} be read with
-ReadMsg. This function always waits for the entire buffer to be sent,
-unless an error occurs.
+This function reads a buffer of {\it nbytes} bytes from the socket.
-Use LastCount to verify the number of bytes actually written.
+Use \helpref{LastCount}{wxsocketbaselastcount} to verify the number of bytes actually read.
-Use Error to determine if the operation succeeded.
+Use \helpref{Error}{wxsocketbaseerror} to determine if the operation succeeded.
\wxheading{Parameters}
-\docparam{buffer}{Buffer with the data to be sent.}
+\docparam{buffer}{Buffer where to put read data.}
\docparam{nbytes}{Number of bytes.}
\wxheading{Remark/Warning}
-wxSocketBase::WriteMsg() will behave as if the {\bf wxSOCKET\_WAITALL} flag
-was always set and it will always ignore the {\bf wxSOCKET\_NOWAIT} flag.
-The exact behaviour of WriteMsg depends on the {\bf wxSOCKET\_BLOCK} flag.
-For a detailed explanation, see \helpref{wxSocketBase::SetFlags}{wxsocketbasesetflags}.
+The exact behaviour of wxSocketBase::Read depends on the combination
+of flags being used. For a detailed explanation, see \helpref{wxSocketBase::SetFlags}{wxsocketbasesetflags}.
\wxheading{See also}
\helpref{wxSocketBase::Error}{wxsocketbaseerror},
\helpref{wxSocketBase::LastError}{wxsocketbaselasterror},
\helpref{wxSocketBase::LastCount}{wxsocketbaselastcount},
-\helpref{wxSocketBase::SetFlags}{wxsocketbasesetflags},
-\helpref{wxSocketBase::ReadMsg}{wxsocketbasereadmsg}
+\helpref{wxSocketBase::SetFlags}{wxsocketbasesetflags}
%
% ReadMsg
%
\membersection{wxSocketBase::ReadMsg}\label{wxsocketbasereadmsg}
-\func{wxSocketBase\&}{ReadMsg}{\param{char *}{ buffer}, \param{wxUint32}{ nbytes}}
+\func{wxSocketBase\&}{ReadMsg}{\param{void *}{ buffer}, \param{wxUint32}{ nbytes}}
-This function reads a buffer sent by WriteMsg on a socket. If the buffer passed
-to the function isn't big enough, the remaining bytes will be discarded. This
-function always waits for the buffer to be entirely filled, unless an error occurs.
+This function reads a buffer sent by \helpref{WriteMsg}{wxsocketbasewritemsg}
+on a socket. If the buffer passed to the function isn't big enough, the
+remaining bytes will be discarded. This function always waits for the
+buffer to be entirely filled, unless an error occurs.
-Use LastCount to verify the number of bytes actually read.
+Use \helpref{LastCount}{wxsocketbaselastcount} to verify the number of bytes actually read.
-Use Error to determine if the operation succeeded.
+Use \helpref{Error}{wxsocketbaseerror} to determine if the operation succeeded.
\wxheading{Parameters}
\docparam{buffer}{Buffer where to put read data.}
-\docparam{nbytes}{Number of bytes allocated for the buffer.}
+\docparam{nbytes}{Size of the buffer.}
\wxheading{Return value}
\wxheading{Remark/Warning}
-wxSocketBase::ReadMsg() will behave as if the {\bf wxSOCKET\_WAITALL} flag
+wxSocketBase::ReadMsg will behave as if the {\bf wxSOCKET\_WAITALL} flag
was always set and it will always ignore the {\bf wxSOCKET\_NOWAIT} flag.
The exact behaviour of ReadMsg depends on the {\bf wxSOCKET\_BLOCK} flag.
For a detailed explanation, see \helpref{wxSocketBase::SetFlags}{wxsocketbasesetflags}.
%
\membersection{wxSocketBase::Unread}\label{wxsocketbaseunread}
-\func{wxSocketBase\&}{Unread}{\param{const char *}{ buffer}, \param{wxUint32}{ nbytes}}
+\func{wxSocketBase\&}{Unread}{\param{const void *}{ buffer}, \param{wxUint32}{ nbytes}}
This function unreads a buffer. That is, the data in the buffer is put back
in the incoming queue. This function is not affected by wxSocket flags.
-If you use LastCount, it will always return {\it nbytes}.
+If you use \helpref{LastCount}{wxsocketbaselastcount}, it will always return {\it nbytes}.
-If you use Error, it will always return FALSE.
+If you use \helpref{Error}{wxsocketbaseerror}, it will always return false.
\wxheading{Parameters}
\helpref{wxSocketBase::LastError}{wxsocketbaselasterror}
%
-% Discard
+% Wait
%
-\membersection{wxSocketBase::Discard}\label{wxsocketbasediscard}
-
-\func{wxSocketBase\&}{Discard}{\void}
-
-This function simply deletes all bytes in the incoming queue. This function
-always returns immediately and its operation is not affected by IO flags.
-
-Use LastCount to see the number of bytes discarded.
-
-If you use Error, it will always return FALSE.
-
-% ---------------------------------------------------------------------------
-% Wait functions
-% ---------------------------------------------------------------------------
\membersection{wxSocketBase::Wait}\label{wxsocketbasewait}
\func{bool}{Wait}{\param{long}{ seconds = -1}, \param{long}{ millisecond = 0}}
-This function waits until one of the following conditions is true: there
-is data available for reading; the output buffer is empty (you can send
-new data); the connection has been lost; an incoming connection arrived
-(only for servers); a connection request has completed (only for clients).
-It is usually better to use the individual Wait functions to wait for the
-required condition.
+This function waits until any of the following conditions is true:
+
+\begin{itemize}
+\item The socket becomes readable.
+\item The socket becomes writable.
+\item An ongoing connection request has completed (\helpref{wxSocketClient}{wxsocketclient} only)
+\item An incoming connection request has arrived (\helpref{wxSocketServer}{wxsocketserver} only)
+\item The connection has been closed.
+\end{itemize}
+
+Note that it is recommended to use the individual Wait functions
+to wait for the required condition, instead of this one.
\wxheading{Parameters}
-\docparam{seconds}{Number of seconds to wait. If -1, it will wait for the default timeout set with SetTimeout.}
+\docparam{seconds}{Number of seconds to wait.
+If -1, it will wait for the default timeout,
+as set with \helpref{SetTimeout}{wxsocketbasesettimeout}.}
\docparam{millisecond}{Number of milliseconds to wait.}
\wxheading{Return value}
-Returns TRUE if an event occured, FALSE if the timeout was reached.
+Returns true when any of the above conditions is satisfied,
+false if the timeout was reached.
\wxheading{See also}
+\helpref{wxSocketBase::InterruptWait}{wxsocketbaseinterruptwait},
+\helpref{wxSocketServer::WaitForAccept}{wxsocketserverwaitforaccept},
+\helpref{wxSocketBase::WaitForLost}{wxsocketbasewaitforlost},
\helpref{wxSocketBase::WaitForRead}{wxsocketbasewaitforread},
\helpref{wxSocketBase::WaitForWrite}{wxsocketbasewaitforwrite},
-\helpref{wxSocketBase::WaitForLost}{wxsocketbasewaitforlost}
+\helpref{wxSocketClient::WaitOnConnect}{wxsocketclientwaitonconnect}
%
-% WaitForRead
+% WaitForLost
%
-\membersection{wxSocketBase::WaitForRead}\label{wxsocketbasewaitforread}
+\membersection{wxSocketBase::WaitForLost}\label{wxsocketbasewaitforlost}
-\func{bool}{WaitForRead}{\param{long}{ seconds = -1}, \param{long}{ millisecond = 0}}
+\func{bool}{Wait}{\param{long}{ seconds = -1}, \param{long}{ millisecond = 0}}
-This function waits until there is data available to be read.
+This function waits until the connection is lost. This may happen if
+the peer gracefully closes the connection or if the connection breaks.
\wxheading{Parameters}
-\docparam{seconds}{Number of seconds to wait. If -1, it will wait for the default timeout set with SetTimeout.}
+\docparam{seconds}{Number of seconds to wait.
+If -1, it will wait for the default timeout,
+as set with \helpref{SetTimeout}{wxsocketbasesettimeout}.}
\docparam{millisecond}{Number of milliseconds to wait.}
\wxheading{Return value}
-Returns TRUE if there is data to be read, FALSE if the timeout was reached.
+Returns true if the connection was lost, false if the timeout was reached.
\wxheading{See also}
-\helpref{wxSocketBase::Wait}{wxsocketbasewait},
-\helpref{wxSocketBase::WaitForWrite}{wxsocketbasewaitforwrite},
-\helpref{wxSocketBase::WaitForLost}{wxsocketbasewaitforlost}
+\helpref{wxSocketBase::InterruptWait}{wxsocketbaseinterruptwait},
+\helpref{wxSocketBase::Wait}{wxsocketbasewait}
%
-% WaitForWrite
+% WaitForRead
%
-\membersection{wxSocketBase::WaitForWrite}\label{wxsocketbasewaitforwrite}
+\membersection{wxSocketBase::WaitForRead}\label{wxsocketbasewaitforread}
-\func{bool}{WaitForWrite}{\param{long}{ seconds = -1}, \param{long}{ millisecond = 0}}
+\func{bool}{WaitForRead}{\param{long}{ seconds = -1}, \param{long}{ millisecond = 0}}
-This function waits until you can write to the socket.
+This function waits until the socket is readable. This might mean that
+queued data is available for reading or, for streamed sockets, that
+the connection has been closed, so that a read operation will complete
+immediately without blocking (unless the {\bf wxSOCKET\_WAITALL} flag
+is set, in which case the operation might still block).
\wxheading{Parameters}
-\docparam{seconds}{Number of seconds to wait. If -1, it will wait for the default timeout set with SetTimeout.}
+\docparam{seconds}{Number of seconds to wait.
+If -1, it will wait for the default timeout,
+as set with \helpref{SetTimeout}{wxsocketbasesettimeout}.}
\docparam{millisecond}{Number of milliseconds to wait.}
\wxheading{Return value}
-Returns TRUE if you can write to the socket, FALSE if the timeout was reached.
+Returns true if the socket becomes readable, false on timeout.
\wxheading{See also}
-\helpref{wxSocketBase::Wait}{wxsocketbasewait},
-\helpref{wxSocketBase::WaitForRead}{wxsocketbasewaitforread},
-\helpref{wxSocketBase::WaitForLost}{wxsocketbasewaitforlost}
+\helpref{wxSocketBase::InterruptWait}{wxsocketbaseinterruptwait},
+\helpref{wxSocketBase::Wait}{wxsocketbasewait}
%
-% WaitForLost
+% WaitForWrite
%
-\membersection{wxSocketBase::WaitForLost}\label{wxsocketbasewaitforlost}
+\membersection{wxSocketBase::WaitForWrite}\label{wxsocketbasewaitforwrite}
-\func{bool}{Wait}{\param{long}{ seconds = -1}, \param{long}{ millisecond = 0}}
+\func{bool}{WaitForWrite}{\param{long}{ seconds = -1}, \param{long}{ millisecond = 0}}
-This function waits until the connection is lost. This may happen if the
-peer closes the connection or if the connection breaks.
+This function waits until the socket becomes writable. This might mean that
+the socket is ready to send new data, or for streamed sockets, that the
+connection has been closed, so that a write operation is guaranteed to
+complete immediately (unless the {\bf wxSOCKET\_WAITALL} flag is set,
+in which case the operation might still block).
\wxheading{Parameters}
-\docparam{seconds}{Number of seconds to wait. If -1, it will wait for the default timeout set with SetTimeout.}
+\docparam{seconds}{Number of seconds to wait.
+If -1, it will wait for the default timeout,
+as set with \helpref{SetTimeout}{wxsocketbasesettimeout}.}
\docparam{millisecond}{Number of milliseconds to wait.}
\wxheading{Return value}
-Returns TRUE if the connection was lost, FALSE if the timeout was reached.
+Returns true if the socket becomes writable, false on timeout.
\wxheading{See also}
-\helpref{wxSocketBase::WaitForRead}{wxsocketbasewaitforread},
-\helpref{wxSocketBase::WaitForWrite}{wxsocketbasewaitforwrite},
-\helpref{wxSocketBase::WaitForLost}{wxsocketbasewaitforlost}
-
-% ---------------------------------------------------------------------------
-% Socket state
-% ---------------------------------------------------------------------------
+\helpref{wxSocketBase::InterruptWait}{wxsocketbaseinterruptwait},
+\helpref{wxSocketBase::Wait}{wxsocketbasewait}
%
-% RestoreState
+% Write
%
-\membersection{wxSocketBase::RestoreState}\label{wxsocketbaserestorestate}
-
-\func{void}{RestoreState}{\void}
-
-This function restores the previous state of the socket, as saved
-with SaveState.
-
-Calls to SaveState / RestoreState can be nested.
+\membersection{wxSocketBase::Write}\label{wxsocketbasewrite}
-\wxheading{See also}
+\func{wxSocketBase\&}{Write}{\param{const void *}{ buffer}, \param{wxUint32}{ nbytes}}
-\helpref{wxSocketBase::SaveState}{wxsocketbasesavestate}
+This function writes a buffer of {\it nbytes} bytes to the socket.
-%
-% SaveState
-%
-\membersection{wxSocketBase::SaveState}\label{wxsocketbasesavestate}
+Use \helpref{LastCount}{wxsocketbaselastcount} to verify the number of bytes actually written.
-\func{void}{SaveState}{\void}
+Use \helpref{Error}{wxsocketbaseerror} to determine if the operation succeeded.
-This function saves the current state of the socket object in a stack:
-actually it saves all flags (those set with SetFlags, SetNotify, Notify)
-and the state of the asynchronous callbacks (Callback, CallbackData).
+\wxheading{Parameters}
-Calls to SaveState / RestoreState can be nested.
+\docparam{buffer}{Buffer with the data to be sent.}
-\wxheading{See also}
+\docparam{nbytes}{Number of bytes.}
-\helpref{wxSocketBase::RestoreState}{wxsocketbaserestorestate}
+\wxheading{Return value}
-%
-% GetLocal
-%
-\membersection{wxSocketBase::GetLocal}{wxsocketbasegetlocal}
+Returns a reference to the current object.
-\constfunc{bool}{GetLocal}{\param{wxSockAddress\& }{addr\_man}}
+\wxheading{Remark/Warning}
-This function returns the local address field of the socket. The local
-address field contains the complete local address of the socket (local
-address, local port, ...).
+The exact behaviour of wxSocketBase::Write depends on the combination
+of flags being used. For a detailed explanation, see \helpref{wxSocketBase::SetFlags}{wxsocketbasesetflags}.
-\wxheading{Return value}
+\wxheading{See also}
-It returns TRUE if no errors happened, FALSE otherwise.
+\helpref{wxSocketBase::Error}{wxsocketbaseerror},
+\helpref{wxSocketBase::LastError}{wxsocketbaselasterror},
+\helpref{wxSocketBase::LastCount}{wxsocketbaselastcount},
+\helpref{wxSocketBase::SetFlags}{wxsocketbasesetflags}
%
-% GetPeer
+% WriteMsg
%
-\membersection{wxSocketBase::GetPeer}{wxsocketbasegetlocal}
-
-\constfunc{bool}{GetPeer}{\param{wxSockAddress\& }{addr\_man}}
-
-This function returns the peer address field of the socket. The peer
-address field contains the complete peer host address of the socket
-(address, port, ...).
-
-\wxheading{Return value}
-
-It returns TRUE if no errors happened, FALSE otherwise.
+\membersection{wxSocketBase::WriteMsg}\label{wxsocketbasewritemsg}
-% ---------------------------------------------------------------------------
-% Socket callbacks
-% ---------------------------------------------------------------------------
-\membersection{wxSocketBase::SetEventHandler}\label{wxsocketbaseseteventhandler}
+\func{wxSocketBase\&}{WriteMsg}{\param{const void *}{ buffer}, \param{wxUint32}{ nbytes}}
-\func{void}{SetEventHandler}{\param{wxEvtHandler\&}{ evt\_hdlr}, \param{int}{ id = -1}}
+This function writes a buffer of {\it nbytes} bytes from the socket, but it
+writes a short header before so that \helpref{ReadMsg}{wxsocketbasereadmsg}
+knows how much data should it actually read. So, a buffer sent with WriteMsg
+{\bf must} be read with ReadMsg. This function always waits for the entire
+buffer to be sent, unless an error occurs.
-Sets an event handler to be called when a socket event occurs. The handler
-will be called for those events for which notification is enabled with
-SetNotify and Notify.
+Use \helpref{LastCount}{wxsocketbaselastcount} to verify the number of bytes actually written.
-You can also specify a callback function to be called when an event occurs.
-See \helpref{Callback}{wxsocketbasecallback} and \helpref{CallbackData}{wxsocketbasecallbackdata}.
+Use \helpref{Error}{wxsocketbaseerror} to determine if the operation succeeded.
\wxheading{Parameters}
-\docparam{evt\_hdlr}{Specifies the event handler you want to use.}
-
-\docparam{id}{The id of socket event.}
-
-\wxheading{See also}
-
-\helpref{wxSocketBase::SetNotify}{wxsocketbasesetnotify},
-\helpref{wxSocketBase::Notify}{wxsocketbasenotify},
-\helpref{wxSocketEvent}{wxsocketevent},
-\helpref{wxEvtHandler}{wxevthandler},
-\helpref{wxSocketBase::Callback}{wxsocketbasecallback},
-\helpref{wxSocketBase::CallbackData}{wxsocketbasecallbackdata}
-
-\membersection{wxSocketBase::Callback}\label{wxsocketbasecallback}
-
-\func{wxSocketBase::wxSockCbk}{Callback}{\param{wxSocketBase::wxSockCbk}{ callback}}
-
-You can setup a callback function to be called when an event occurs. The function
-will be called only for those events for which notification has been enabled
-with Notify and SetNotify. The prototype of the callback must be as follows:
-
-\begin{verbatim}
-void SocketCallback(wxSocketBase& sock, wxSocketNotify evt, char *cdata);
-\end{verbatim}
+\docparam{buffer}{Buffer with the data to be sent.}
-The first parameter is a reference to the socket object in which the event
-occured. The second parameter tells you which event occured. (See \helpref{wxSocket events}{wxsocketbase}).
-The third parameter is the user data you specified using \helpref{CallbackData}{wxsocketbasecallbackdata}.
+\docparam{nbytes}{Number of bytes to send.}
\wxheading{Return value}
-A pointer to the previous callback.
-
-\wxheading{See also}
-
-\helpref{wxSocketBase::CallbackData}{wxsocketbasecallbackdata},
-\helpref{wxSocketBase::SetNotify}{wxsocketbasesetnotify},
-\helpref{wxSocketBase::Notify}{wxsocketbasenotify}
-
-\membersection{wxSocketBase::CallbackData}\label{wxsocketbasecallbackdata}
+Returns a reference to the current object.
-\func{char *}{CallbackData}{\param{char *}{cdata}}
+\wxheading{Remark/Warning}
-This function sets the the user data which will be passed to a
-callback function set via \helpref{Callback}{wxsocketbasecallback}.
+wxSocketBase::WriteMsg will behave as if the {\bf wxSOCKET\_WAITALL} flag
+was always set and it will always ignore the {\bf wxSOCKET\_NOWAIT} flag.
+The exact behaviour of WriteMsg depends on the {\bf wxSOCKET\_BLOCK} flag.
+For a detailed explanation, see \helpref{wxSocketBase::SetFlags}{wxsocketbasesetflags}.
-\wxheading{Return value}
+\wxheading{See also}
-A pointer to the previous user data.
+\helpref{wxSocketBase::Error}{wxsocketbaseerror},
+\helpref{wxSocketBase::LastError}{wxsocketbaselasterror},
+\helpref{wxSocketBase::LastCount}{wxsocketbaselastcount},
+\helpref{wxSocketBase::SetFlags}{wxsocketbasesetflags},
+\helpref{wxSocketBase::ReadMsg}{wxsocketbasereadmsg}
-\helpref{wxSocketBase::Callback}{wxsocketbasecallback},
-\helpref{wxSocketBase::SetNotify}{wxsocketbasesetnotify},
-\helpref{wxSocketBase::Notify}{wxsocketbasenotify}
% ---------------------------------------------------------------------------
% CLASS wxSocketClient
% ---------------------------------------------------------------------------
+
\section{\class{wxSocketClient}}\label{wxsocketclient}
\wxheading{Derived from}
<wx/socket.h>
+\latexignore{\rtfignore{\wxheading{Members}}}
+
% ---------------------------------------------------------------------------
% Members
% ---------------------------------------------------------------------------
%
% wxSocketClient
%
-\membersection{wxSocketClient::wxSocketClient}
+\membersection{wxSocketClient::wxSocketClient}\label{wxsocketclientctor}
-\func{}{wxSocketClient}{\param{wxSockFlags}{ flags = wxSocketBase::NONE}}
+\func{}{wxSocketClient}{\param{wxSocketFlags}{ flags = wxSOCKET\_NONE}}
-Constructs a new wxSocketClient.
+Constructor.
\wxheading{Parameters}
%
% ~wxSocketClient
%
-\membersection{wxSocketClient::\destruct{wxSocketClient}}
+\membersection{wxSocketClient::\destruct{wxSocketClient}}\label{wxsocketclientdtor}
\func{}{\destruct{wxSocketClient}}{\void}
-Destroys a wxSocketClient object.
+Destructor. Please see \helpref{wxSocketBase::Destroy}{wxsocketbasedestroy}.
%
% Connect
%
\membersection{wxSocketClient::Connect}\label{wxsocketclientconnect}
-\func{bool}{Connect}{\param{wxSockAddress\&}{ address}, \param{bool}{ wait = TRUE}}
+\func{bool}{Connect}{\param{wxSockAddress\&}{ address}, \param{bool}{ wait = true}}
+
+\func{bool}{Connect}{\param{wxSockAddress\&}{ address}, \param{wxSockAddress\&}{ local},
+\param{bool}{ wait = true}}
Connects to a server using the specified address.
-If {\it wait} is TRUE, Connect will wait until the connection completes
-successfully, or until an event occurs. {\bf Warning !} This will block the GUI.
+If {\it wait} is true, Connect will wait until the connection
+completes. {\bf Warning:} This will block the GUI.
-If {\it wait} is FALSE, Connect will try to establish the connection and
+If {\it wait} is false, Connect will try to establish the connection and
return immediately, without blocking the GUI. When used this way, even if
-Connect returns FALSE, the connection request can be completed later.
-To detect this, use WaitConnection, or catch {\bf wxSOCKET\_CONNECTION}
-events (for successful establishment) and {\bf wxSOCKET\_LOST} events
-(for connection failure).
+Connect returns false, the connection request can be completed later.
+To detect this, use \helpref{WaitOnConnect}{wxsocketclientwaitonconnect},
+or catch {\bf wxSOCKET\_CONNECTION} events (for successful establishment)
+and {\bf wxSOCKET\_LOST} events (for connection failure).
\wxheading{Parameters}
\docparam{address}{Address of the server.}
-\docparam{wait}{If TRUE, waits for the connection to be ready.}
+\docparam{local}{Bind to the specified local address and port before connecting.
+The local address and port can also be set using \helpref{SetLocal}{wxsocketbasesetlocal},
+and then using the 2-parameter Connect method.}
+
+\docparam{wait}{If true, waits for the connection to complete.}
\wxheading{Return value}
-Returns TRUE if the connection is established and no error occurs.
+Returns true if the connection is established and no error occurs.
-If {\it wait} was TRUE, and Connect returns FALSE, an error occured
+If {\it wait} was true, and Connect returns false, an error occurred
and the connection failed.
-If {\it wait} was FALSE, and Connect returns FALSE, you should still
+If {\it wait} was false, and Connect returns false, you should still
be prepared to handle the completion of this connection request, either
-with WaitOnConnect or by watching {\bf wxSOCKET\_CONNECTION} and
-{\bf wxSOCKET\_LOST} events.
+with \helpref{WaitOnConnect}{wxsocketclientwaitonconnect} or by
+watching {\bf wxSOCKET\_CONNECTION} and {\bf wxSOCKET\_LOST} events.
\wxheading{See also}
\func{bool}{WaitOnConnect}{\param{long}{ seconds = -1}, \param{long}{ milliseconds = 0}}
-Wait until the connection is succesfully established or until it fails.
-Use this function after a call to Connect with {\it wait} set to FALSE.
+Wait until a connection request completes, or until the specified timeout
+elapses. Use this function after issuing a call
+to \helpref{Connect}{wxsocketclientconnect} with {\it wait} set to false.
\wxheading{Parameters}
-\docparam{seconds}{Number of seconds to wait. If -1, it will wait for the default timeout set with SetTimeout.}
+\docparam{seconds}{Number of seconds to wait.
+If -1, it will wait for the default timeout,
+as set with \helpref{SetTimeout}{wxsocketbasesettimeout}.}
\docparam{millisecond}{Number of milliseconds to wait.}
\wxheading{Return value}
-If the connection is succesfully established, it returns TRUE.
+WaitOnConnect returns true if the connection request completes. This
+does not necessarily mean that the connection was successfully established;
+it might also happen that the connection was refused by the peer. Use
+\helpref{IsConnected}{wxsocketbaseisconnected} to distinguish between
+these two situations.
+
+If the timeout elapses, WaitOnConnect returns false.
+
+These semantics allow code like this:
-If the timeout expires, or if the connection fails, it returns FALSE.
+\begin{verbatim}
+// Issue the connection request
+client->Connect(addr, false);
+
+// Wait until the request completes or until we decide to give up
+bool waitmore = true;
+while ( !client->WaitOnConnect(seconds, millis) && waitmore )
+{
+ // possibly give some feedback to the user,
+ // and update waitmore as needed.
+}
+bool success = client->IsConnected();
+\end{verbatim}
\wxheading{See also}
-\helpref{wxSocketClient::Connect}{wxsocketclientconnect}
+\helpref{wxSocketClient::Connect}{wxsocketclientconnect},
+\helpref{wxSocketBase::InterruptWait}{wxsocketbaseinterruptwait},
+\helpref{wxSocketBase::IsConnected}{wxsocketbaseisconnected}
% ---------------------------------------------------------------------------
% CLASS: wxSocketEvent
\wxheading{Event table macros}
-To process a socket event, use these event handler macros to direct input to member
-functions that take a wxSocketEvent argument.
+To process a socket event, use these event handler macros to direct input
+to member functions that take a wxSocketEvent argument.
\twocolwidtha{7cm}
\begin{twocollist}\itemsep=0pt
\twocolitem{{\bf EVT\_SOCKET(id, func)}}{Process a socket event, supplying the member function.}
-\end{twocollist}%
+\end{twocollist}
\wxheading{See also}
\latexignore{\rtfignore{\wxheading{Members}}}
-\membersection{wxSocketEvent::wxSocketEvent}
+\membersection{wxSocketEvent::wxSocketEvent}\label{wxsocketeventctor}
\func{}{wxSocketEvent}{\param{int}{ id = 0}}
Constructor.
-\membersection{wxSocketEvent::Socket}\label{wxsocketeventsocket}
-
-\constfunc{wxSocketBase *}{Socket}{\void}
-
-Returns the socket object to which this event refers to. This makes
-it possible to use the same event handler for different sockets.
-
-\membersection{wxSocketEvent::SocketEvent}\label{wxsocketeventsocketevent}
-
-\constfunc{wxSocketNotify}{SocketEvent}{\void}
-
-Returns the socket event type.
-
-% ---------------------------------------------------------------------------
-% CLASS: wxSocketServer
-% ---------------------------------------------------------------------------
-\section{\class{wxSocketServer}}\label{wxsocketserver}
-
-\wxheading{Derived from}
-
-\helpref{wxSocketBase}{wxsocketbase}
-
-\wxheading{Include files}
-
-<wx/socket.h>
-
-% ---------------------------------------------------------------------------
-% Members
-% ---------------------------------------------------------------------------
-\latexignore{\rtfignore{\wxheading{Members}}}
-
-%
-% wxSocketServer
-%
-\membersection{wxSocketServer::wxSocketServer}\label{wxsocketserverconstr}
-
-\func{}{wxSocketServer}{\param{wxSockAddress\&}{ address}, \param{wxSockFlags}{ flags = wxSocketBase::NONE}}
-
-Constructs a new wxSocketServer.
-
-\wxheading{Parameters}
-
-\docparam{address}{Specifies the local address for the server (e.g. port number).}
-
-\docparam{flags}{Socket flags (See \helpref{wxSocketBase::SetFlags}{wxsocketbasesetflags})}
-
-%
-% ~wxSocketServer
-%
-\membersection{wxSocketServer::\destruct{wxSocketServer}}
-
-\func{}{\destruct{wxSocketServer}}{\void}
-
-Destroys a wxSocketServer object (it doesn't close the accepted connections).
-
-%
-% Accept
-%
-\membersection{wxSocketServer::Accept}\label{wxsocketserveraccept}
-
-\func{wxSocketBase *}{Accept}{\param{bool}{ wait = TRUE}}
-
-Creates a new object wxSocketBase and accepts an incoming connection.
-
-If {\it wait} is TRUE and there are no pending connections to be
-accepted, it will wait for the next incoming connection to arrive.
-{\bf Warning !} This will block the GUI.
-
-If {\it wait} is FALSE, it will try to accept a pending connection
-if there is one, but it will always return immediately without
-blocking the GUI. If you want to use Accept in this way, you can
-either check for incoming connections with WaitForAccept or watch
-{\bf wxSOCKET\_CONNECTION} events, then call Accept once you know
-that there is an incoming connection waiting to be accepted.
-
-\wxheading{Return value}
-
-Returns an opened socket connection, or NULL if an error occured or
-if the {\it wait} parameter was FALSE and there were no pending
-connections.
+\membersection{wxSocketEvent::GetClientData}\label{wxsocketeventgetclientdata}
-\wxheading{See also}
-
-\helpref{wxSocketServer::WaitForAccept}{wxsocketserverwaitforaccept},
-\helpref{wxSocketBase::SetNotify}{wxsocketbasesetnotify},
-\helpref{wxSocketBase::Notify}{wxsocketbasenotify},
-\helpref{wxSocketServer::AcceptWith}{wxsocketserveracceptwith}
-
-%
-% AcceptWith
-%
-\membersection{wxSocketServer::AcceptWith}\label{wxsocketserveracceptwith}
-
-\func{bool}{AcceptWith}{\param{wxSocketBase\&}{ socket}, \param{bool}{ wait = TRUE}}
-
-Accept an incoming connection using the specified socket object.
-
-\wxheading{Parameters}
-
-\docparam{socket}{Socket to be initialized}
-
-\wxheading{Return value}
-
-Returns TRUE on success, or FALSE if an error occured or if the
-{\it wait} parameter was FALSE and there were no pending
-connections.
+\func{void *}{GetClientData}{\void}
-\helpref{wxSocketServer::WaitForAccept}{wxsocketserverwaitforaccept},
-\helpref{wxSocketBase::SetNotify}{wxsocketbasesetnotify},
-\helpref{wxSocketBase::Notify}{wxsocketbasenotify},
-\helpref{wxSocketServer::Accept}{wxsocketserveraccept} for a detailed explanation
-
-%
-% WaitForAccept
-%
-\membersection{wxSocketServer::WaitForAccept}\label{wxsocketserverwaitforaccept}
-
-\func{bool}{WaitForAccept}{\param{long}{ seconds = -1}, \param{long}{ millisecond = 0}}
-
-This function waits for an incoming connection. Use it if you want to call
-Accept or AcceptWith with {\it wait} set to FALSE, to detect when an incoming
-connection is waiting to be accepted.
+Gets the client data of the socket which generated this event, as
+set with \helpref{wxSocketBase::SetClientData}{wxsocketbasesetclientdata}.
-\wxheading{Parameters}
-
-\docparam{seconds}{Number of seconds to wait. If -1, it will wait for the default timeout set with SetTimeout.}
+\membersection{wxSocketEvent::GetSocket}\label{wxsocketeventgetsocket}
-\docparam{millisecond}{Number of milliseconds to wait.}
+\constfunc{wxSocketBase *}{GetSocket}{\void}
-\wxheading{Return value}
+Returns the socket object to which this event refers to. This makes
+it possible to use the same event handler for different sockets.
-Returns TRUE if an incoming connection arrived, FALSE if the timeout expired.
+\membersection{wxSocketEvent::GetSocketEvent}\label{wxsocketeventgetsocketevent}
-\wxheading{See also}
+\constfunc{wxSocketNotify}{GetSocketEvent}{\void}
-\helpref{wxSocketServer::Accept}{wxsocketserveraccept},
-\helpref{wxSocketServer::AcceptWith}{wxsocketserveracceptwith}
+Returns the socket event type.
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