wxWidgets/include/wx/sckipc.h

/////////////////////////////////////////////////////////////////////////////
// Name:        sckipc.h
// Purpose:     Interprocess communication implementation (wxSocket version)
// Author:      Julian Smart
// Modified by: Guilhem Lavaux (big rewrite) May 1997, 1998
//              Guillermo Rodriguez (updated for wxSocket v2) Jan 2000
//                                  (callbacks deprecated)    Mar 2000
// Created:     1993
// RCS-ID:      $Id$
// Copyright:   (c) Julian Smart 1993
//              (c) Guilhem Lavaux 1997, 1998
//              (c) 2000 Guillermo Rodriguez <guille@iies.es>
// Licence:     wxWindows licence
/////////////////////////////////////////////////////////////////////////////

#ifndef _WX_SCKIPC_H
#define _WX_SCKIPC_H

#include "wx/defs.h"

#if wxUSE_SOCKETS && wxUSE_IPC

#include "wx/ipcbase.h"
#include "wx/socket.h"
#include "wx/sckstrm.h"
#include "wx/datstrm.h"

/*
 * Mini-DDE implementation

   Most transactions involve a topic name and an item name (choose these
   as befits your application).

   A client can:

   - ask the server to execute commands (data) associated with a topic
   - request data from server by topic and item
   - poke data into the server
   - ask the server to start an advice loop on topic/item
   - ask the server to stop an advice loop

   A server can:

   - respond to execute, request, poke and advice start/stop
   - send advise data to client

   Note that this limits the server in the ways it can send data to the
   client, i.e. it can't send unsolicited information.
 *
 */

class WXDLLIMPEXP_FWD_NET wxTCPServer;
class WXDLLIMPEXP_FWD_NET wxTCPClient;

class WXDLLIMPEXP_NET wxTCPConnection : public wxConnectionBase
{
public:
  wxTCPConnection(void *buffer, size_t size);
  wxTCPConnection();
  virtual ~wxTCPConnection();

  // To enable the compressor (NOTE: not implemented!)
  void Compress(bool on);


  // implement base class pure virtual methods
  virtual const void *Request(const wxString& item,
                              size_t *size = NULL,
                              wxIPCFormat format = wxIPC_TEXT);
  virtual bool StartAdvise(const wxString& item);
  virtual bool StopAdvise(const wxString& item);
  virtual bool Disconnect(void);

protected:
  virtual bool DoExecute(const void *data, size_t size, wxIPCFormat format);
  virtual bool DoPoke(const wxString& item, const void *data, size_t size,
                      wxIPCFormat format);
  virtual bool DoAdvise(const wxString& item, const void *data, size_t size,
                        wxIPCFormat format);


  wxSocketBase       *m_sock;
  wxSocketStream     *m_sockstrm;
  wxDataInputStream  *m_codeci;
  wxDataOutputStream *m_codeco;
  wxString            m_topic;

  friend class wxTCPServer;
  friend class wxTCPClient;
  friend class wxTCPEventHandler;

  DECLARE_NO_COPY_CLASS(wxTCPConnection)
  DECLARE_DYNAMIC_CLASS(wxTCPConnection)
};

class WXDLLIMPEXP_NET wxTCPServer : public wxServerBase
{
public:
  wxTCPServer();
  virtual ~wxTCPServer();

  // Returns false on error (e.g. port number is already in use)
  virtual bool Create(const wxString& serverName);

  virtual wxConnectionBase *OnAcceptConnection(const wxString& topic);

  wxTCPConnection *topLevelConnection;

protected:
  wxSocketServer *m_server;

#ifdef __UNIX_LIKE__
  // the name of the file associated to the Unix domain socket, may be empty
  wxString m_filename;
#endif // __UNIX_LIKE__

  DECLARE_NO_COPY_CLASS(wxTCPServer)
  DECLARE_DYNAMIC_CLASS(wxTCPServer)
};

class WXDLLIMPEXP_NET wxTCPClient : public wxClientBase
{
public:
  wxTCPClient();
  virtual ~wxTCPClient();

  virtual bool ValidHost(const wxString& host);

  // Call this to make a connection. Returns NULL if cannot.
  virtual wxConnectionBase *MakeConnection(const wxString& host,
                                           const wxString& server,
                                           const wxString& topic);

  // Callbacks to CLIENT - override at will
  virtual wxConnectionBase *OnMakeConnection();

private:
  DECLARE_DYNAMIC_CLASS(wxTCPClient)
};

#endif // wxUSE_SOCKETS && wxUSE_IPC

#endif // _WX_SCKIPC_H