include/wx/sckipc.h

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        sckipc.h
   3 // Purpose:     Interprocess communication implementation (wxSocket version)
   4 // Author:      Julian Smart
   5 // Modified by: Guilhem Lavaux (big rewrite) May 1997, 1998
   6 //              Guillermo Rodriguez (updated for wxSocket v2) Jan 2000
   7 //                                  (callbacks deprecated)    Mar 2000
   8 // Created:     1993
   9 // RCS-ID:      $Id$
  10 // Copyright:   (c) Julian Smart 1993
  11 //              (c) Guilhem Lavaux 1997, 1998
  12 //              (c) 2000 Guillermo Rodriguez <guille@iies.es>
  13 // Licence:     wxWindows licence
  14 /////////////////////////////////////////////////////////////////////////////
  15
  16 #ifndef _WX_SCKIPC_H
  17 #define _WX_SCKIPC_H
  18
  19 #include "wx/defs.h"
  20
  21 #if wxUSE_SOCKETS && wxUSE_IPC
  22
  23 #include "wx/ipcbase.h"
  24 #include "wx/socket.h"
  25 #include "wx/sckstrm.h"
  26 #include "wx/datstrm.h"
  27
  28 /*
  29  * Mini-DDE implementation
  30
  31    Most transactions involve a topic name and an item name (choose these
  32    as befits your application).
  33
  34    A client can:
  35
  36    - ask the server to execute commands (data) associated with a topic
  37    - request data from server by topic and item
  38    - poke data into the server
  39    - ask the server to start an advice loop on topic/item
  40    - ask the server to stop an advice loop
  41
  42    A server can:
  43
  44    - respond to execute, request, poke and advice start/stop
  45    - send advise data to client
  46
  47    Note that this limits the server in the ways it can send data to the
  48    client, i.e. it can't send unsolicited information.
  49  *
  50  */
  51
  52 class WXDLLIMPEXP_FWD_NET wxTCPServer;
  53 class WXDLLIMPEXP_FWD_NET wxTCPClient;
  54
  55 class wxIPCSocketStreams;
  56
  57 class WXDLLIMPEXP_NET wxTCPConnection : public wxConnectionBase
  58 {
  59 public:
  60     wxTCPConnection() { Init(); }
  61     wxTCPConnection(void *buffer, size_t size)
  62         : wxConnectionBase(buffer, size)
  63     {
  64         Init();
  65     }
  66
  67     virtual ~wxTCPConnection();
  68
  69     // implement base class pure virtual methods
  70     virtual const void *Request(const wxString& item,
  71                                 size_t *size = NULL,
  72                                 wxIPCFormat format = wxIPC_TEXT);
  73     virtual bool StartAdvise(const wxString& item);
  74     virtual bool StopAdvise(const wxString& item);
  75     virtual bool Disconnect(void);
  76
  77     // Will be used in the future to enable the compression but does nothing
  78     // for now.
  79     void Compress(bool on);
  80
  81
  82 protected:
  83     virtual bool DoExecute(const void *data, size_t size, wxIPCFormat format);
  84     virtual bool DoPoke(const wxString& item, const void *data, size_t size,
  85                         wxIPCFormat format);
  86     virtual bool DoAdvise(const wxString& item, const void *data, size_t size,
  87                           wxIPCFormat format);
  88
  89
  90     // notice that all the members below are only initialized once the
  91     // connection is made, i.e. in MakeConnection() for the client objects and
  92     // after OnAcceptConnection() in the server ones
  93
  94     // the underlying socket (wxSocketClient for IPC client and wxSocketServer
  95     // for IPC server)
  96     wxSocketBase *m_sock;
  97
  98     // various streams that we use
  99     wxIPCSocketStreams *m_streams;
 100
 101     // the topic of this connection
 102     wxString m_topic;
 103
 104 private:
 105     // common part of both ctors
 106     void Init();
 107
 108     friend class wxTCPServer;
 109     friend class wxTCPClient;
 110     friend class wxTCPEventHandler;
 111
 112     DECLARE_NO_COPY_CLASS(wxTCPConnection)
 113     DECLARE_DYNAMIC_CLASS(wxTCPConnection)
 114 };
 115
 116 class WXDLLIMPEXP_NET wxTCPServer : public wxServerBase
 117 {
 118 public:
 119     wxTCPServer();
 120     virtual ~wxTCPServer();
 121
 122     // Returns false on error (e.g. port number is already in use)
 123     virtual bool Create(const wxString& serverName);
 124
 125     virtual wxConnectionBase *OnAcceptConnection(const wxString& topic);
 126
 127 protected:
 128     wxSocketServer *m_server;
 129
 130 #ifdef __UNIX_LIKE__
 131     // the name of the file associated to the Unix domain socket, may be empty
 132     wxString m_filename;
 133 #endif // __UNIX_LIKE__
 134
 135     DECLARE_NO_COPY_CLASS(wxTCPServer)
 136     DECLARE_DYNAMIC_CLASS(wxTCPServer)
 137 };
 138
 139 class WXDLLIMPEXP_NET wxTCPClient : public wxClientBase
 140 {
 141 public:
 142     wxTCPClient();
 143
 144     virtual bool ValidHost(const wxString& host);
 145
 146     // Call this to make a connection. Returns NULL if cannot.
 147     virtual wxConnectionBase *MakeConnection(const wxString& host,
 148                                              const wxString& server,
 149                                              const wxString& topic);
 150
 151     // Callbacks to CLIENT - override at will
 152     virtual wxConnectionBase *OnMakeConnection();
 153
 154 private:
 155     DECLARE_DYNAMIC_CLASS(wxTCPClient)
 156 };
 157
 158 #endif // wxUSE_SOCKETS && wxUSE_IPC
 159
 160 #endif // _WX_SCKIPC_H