include/wx/socket.h

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        socket.h
   3 // Purpose:     Socket handling classes
   4 // Authors:     Guilhem Lavaux, Guillermo Rodriguez Garcia
   5 // Modified by:
   6 // Created:     April 1997
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) Guilhem Lavaux
   9 // Licence:     wxWindows licence
  10 /////////////////////////////////////////////////////////////////////////////
  11
  12 #ifndef _WX_NETWORK_SOCKET_H
  13 #define _WX_NETWORK_SOCKET_H
  14
  15 #if defined(__GNUG__) && !defined(__APPLE__)
  16   #pragma interface "socket.h"
  17 #endif
  18
  19 #include "wx/defs.h"
  20
  21 #if wxUSE_SOCKETS
  22
  23 // ---------------------------------------------------------------------------
  24 // wxSocket headers
  25 // ---------------------------------------------------------------------------
  26
  27 #ifdef WXPREC
  28   #include "wx/wxprec.h"
  29 #else
  30   #include "wx/event.h"
  31   #include "wx/string.h"
  32 #endif
  33
  34 #include "wx/sckaddr.h"
  35 #include "wx/gsocket.h"
  36
  37 // ------------------------------------------------------------------------
  38 // Types and constants
  39 // ------------------------------------------------------------------------
  40
  41 enum wxSocketNotify
  42 {
  43   wxSOCKET_INPUT = GSOCK_INPUT,
  44   wxSOCKET_OUTPUT = GSOCK_OUTPUT,
  45   wxSOCKET_CONNECTION = GSOCK_CONNECTION,
  46   wxSOCKET_LOST = GSOCK_LOST
  47 };
  48
  49 enum
  50 {
  51   wxSOCKET_INPUT_FLAG = GSOCK_INPUT_FLAG,
  52   wxSOCKET_OUTPUT_FLAG = GSOCK_OUTPUT_FLAG,
  53   wxSOCKET_CONNECTION_FLAG = GSOCK_CONNECTION_FLAG,
  54   wxSOCKET_LOST_FLAG = GSOCK_LOST_FLAG
  55 };
  56
  57 typedef GSocketEventFlags wxSocketEventFlags;
  58
  59 enum wxSocketError
  60 {
  61   // from GSocket
  62   wxSOCKET_NOERROR = GSOCK_NOERROR,
  63   wxSOCKET_INVOP = GSOCK_INVOP,
  64   wxSOCKET_IOERR = GSOCK_IOERR,
  65   wxSOCKET_INVADDR = GSOCK_INVADDR,
  66   wxSOCKET_INVSOCK = GSOCK_INVSOCK,
  67   wxSOCKET_NOHOST = GSOCK_NOHOST,
  68   wxSOCKET_INVPORT = GSOCK_INVPORT,
  69   wxSOCKET_WOULDBLOCK = GSOCK_WOULDBLOCK,
  70   wxSOCKET_TIMEDOUT = GSOCK_TIMEDOUT,
  71   wxSOCKET_MEMERR = GSOCK_MEMERR,
  72
  73   // wxSocket-specific (not yet implemented)
  74   wxSOCKET_DUMMY
  75 };
  76
  77 enum
  78 {
  79   wxSOCKET_NONE = 0,
  80   wxSOCKET_NOWAIT = 1,
  81   wxSOCKET_WAITALL = 2,
  82   wxSOCKET_BLOCK = 4
  83 };
  84
  85 enum wxSocketType
  86 {
  87   wxSOCKET_UNINIT,
  88   wxSOCKET_CLIENT,
  89   wxSOCKET_SERVER,
  90   wxSOCKET_BASE,
  91   wxSOCKET_DATAGRAM
  92 };
  93
  94 typedef int wxSocketFlags;
  95
  96
  97 #if WXWIN_COMPATIBILITY
  98   typedef wxSocketType wxSockType;
  99   typedef wxSocketFlags wxSockFlags;
 100 #endif // WXWIN_COMPATIBILITY
 101
 102
 103 // --------------------------------------------------------------------------
 104 // wxSocketBase
 105 // --------------------------------------------------------------------------
 106
 107 class WXDLLEXPORT wxSocketBase : public wxObject
 108 {
 109   DECLARE_CLASS(wxSocketBase)
 110
 111 public:
 112
 113 #if WXWIN_COMPATIBILITY
 114   enum
 115   {
 116     NONE = wxSOCKET_NONE,
 117     NOWAIT = wxSOCKET_NOWAIT,
 118     WAITALL = wxSOCKET_WAITALL,
 119     SPEED = wxSOCKET_BLOCK
 120   };
 121
 122   enum
 123   {
 124     SOCK_UNINIT = wxSOCKET_UNINIT,
 125     SOCK_CLIENT = wxSOCKET_CLIENT,
 126     SOCK_SERVER = wxSOCKET_SERVER,
 127     SOCK_INTERNAL = wxSOCKET_BASE,
 128     SOCK_DATAGRAM = wxSOCKET_DATAGRAM
 129   };
 130
 131   typedef void (*wxSockCbk)(wxSocketBase& sock, wxSocketNotify evt, char *cdata);
 132 #endif // WXWIN_COMPATIBILITY
 133
 134 public:
 135
 136   // Public interface
 137   // ----------------
 138
 139   // ctors and dtors
 140   wxSocketBase();
 141   wxSocketBase(wxSocketFlags flags, wxSocketType type);
 142   virtual ~wxSocketBase();
 143   void Init();
 144   bool Destroy();
 145
 146   // state
 147   inline bool Ok() const { return (m_socket != NULL); };
 148   inline bool Error() const { return m_error; };
 149   inline bool IsConnected() const { return m_connected; };
 150   inline bool IsData() { return WaitForRead(0, 0); };
 151   inline bool IsDisconnected() const { return !IsConnected(); };
 152   inline wxUint32 LastCount() const { return m_lcount; }
 153   inline wxSocketError LastError() const { return (wxSocketError)GSocket_GetError(m_socket); }
 154   void SaveState();
 155   void RestoreState();
 156
 157   // addresses
 158   virtual bool GetLocal(wxSockAddress& addr_man) const;
 159   virtual bool GetPeer(wxSockAddress& addr_man) const;
 160
 161   // base IO
 162   virtual bool  Close();
 163   wxSocketBase& Discard();
 164   wxSocketBase& Peek(void* buffer, wxUint32 nbytes);
 165   wxSocketBase& Read(void* buffer, wxUint32 nbytes);
 166   wxSocketBase& ReadMsg(void *buffer, wxUint32 nbytes);
 167   wxSocketBase& Unread(const void *buffer, wxUint32 nbytes);
 168   wxSocketBase& Write(const void *buffer, wxUint32 nbytes);
 169   wxSocketBase& WriteMsg(const void *buffer, wxUint32 nbytes);
 170
 171   void InterruptWait() { m_interrupt = TRUE; };
 172   bool Wait(long seconds = -1, long milliseconds = 0);
 173   bool WaitForRead(long seconds = -1, long milliseconds = 0);
 174   bool WaitForWrite(long seconds = -1, long milliseconds = 0);
 175   bool WaitForLost(long seconds = -1, long milliseconds = 0);
 176
 177   inline wxSocketFlags GetFlags() const { return m_flags; }
 178   void SetFlags(wxSocketFlags flags);
 179   void SetTimeout(long seconds);
 180
 181   // event handling
 182   void *GetClientData() const { return m_clientData; }
 183   void SetClientData(void *data) { m_clientData = data; }
 184   void SetEventHandler(wxEvtHandler& handler, int id = -1);
 185   void SetNotify(wxSocketEventFlags flags);
 186   void Notify(bool notify);
 187
 188   // initialize/shutdown the sockets (usually called automatically)
 189   static bool IsInitialized();
 190   static bool Initialize();
 191   static void Shutdown();
 192
 193   // callbacks are deprecated, use events instead
 194 #if WXWIN_COMPATIBILITY
 195   wxSockCbk Callback(wxSockCbk cbk_);
 196   char *CallbackData(char *data);
 197 #endif // WXWIN_COMPATIBILITY
 198
 199
 200   // Implementation from now on
 201   // --------------------------
 202
 203   // do not use, should be private (called from GSocket)
 204   void OnRequest(wxSocketNotify notify);
 205
 206   // do not use, not documented nor supported
 207   inline bool IsNoWait() const { return ((m_flags & wxSOCKET_NOWAIT) != 0); }
 208   inline wxSocketType GetType() const { return m_type; }
 209
 210 private:
 211   friend class wxSocketClient;
 212   friend class wxSocketServer;
 213   friend class wxDatagramSocket;
 214
 215   // low level IO
 216   wxUint32 _Read(void* buffer, wxUint32 nbytes);
 217   wxUint32 _Write(const void *buffer, wxUint32 nbytes);
 218   bool     _Wait(long seconds, long milliseconds, wxSocketEventFlags flags);
 219
 220   // pushback buffer
 221   void     Pushback(const void *buffer, wxUint32 size);
 222   wxUint32 GetPushback(void *buffer, wxUint32 size, bool peek);
 223
 224 private:
 225   // socket
 226   GSocket      *m_socket;           // GSocket
 227   wxSocketType  m_type;             // wxSocket type
 228
 229   // state
 230   wxSocketFlags m_flags;            // wxSocket flags
 231   bool          m_connected;        // connected?
 232   bool          m_establishing;     // establishing connection?
 233   bool          m_reading;          // busy reading?
 234   bool          m_writing;          // busy writing?
 235   bool          m_error;            // did last IO call fail?
 236   wxSocketError m_lasterror;        // last error (not cleared on success)
 237   wxUint32      m_lcount;           // last IO transaction size
 238   unsigned long m_timeout;          // IO timeout value
 239   wxList        m_states;           // stack of states
 240   bool          m_interrupt;        // interrupt ongoing wait operations?
 241   bool          m_beingDeleted;     // marked for delayed deletion?
 242
 243   // pushback buffer
 244   void         *m_unread;           // pushback buffer
 245   wxUint32      m_unrd_size;        // pushback buffer size
 246   wxUint32      m_unrd_cur;         // pushback pointer (index into buffer)
 247
 248   // events
 249   int           m_id;               // socket id
 250   wxEvtHandler *m_handler;          // event handler
 251   void         *m_clientData;       // client data for events
 252   bool          m_notify;           // notify events to users?
 253   wxSocketEventFlags  m_eventmask;  // which events to notify?
 254
 255   // the initialization count, GSocket is initialized if > 0
 256   static size_t m_countInit;
 257
 258   // callbacks are deprecated, use events instead
 259 #if WXWIN_COMPATIBILITY
 260   wxSockCbk     m_cbk;              // callback
 261   char         *m_cdata;            // callback data
 262 #endif // WXWIN_COMPATIBILITY
 263 };
 264
 265
 266 // --------------------------------------------------------------------------
 267 // wxSocketServer
 268 // --------------------------------------------------------------------------
 269
 270 class WXDLLEXPORT wxSocketServer : public wxSocketBase
 271 {
 272   DECLARE_CLASS(wxSocketServer)
 273
 274 public:
 275   wxSocketServer(wxSockAddress& addr, wxSocketFlags flags = wxSOCKET_NONE);
 276
 277   wxSocketBase* Accept(bool wait = TRUE);
 278   bool AcceptWith(wxSocketBase& socket, bool wait = TRUE);
 279
 280   bool WaitForAccept(long seconds = -1, long milliseconds = 0);
 281 };
 282
 283
 284 // --------------------------------------------------------------------------
 285 // wxSocketClient
 286 // --------------------------------------------------------------------------
 287
 288 class WXDLLEXPORT wxSocketClient : public wxSocketBase
 289 {
 290   DECLARE_CLASS(wxSocketClient)
 291
 292 public:
 293   wxSocketClient(wxSocketFlags flags = wxSOCKET_NONE);
 294   virtual ~wxSocketClient();
 295
 296   virtual bool Connect(wxSockAddress& addr, bool wait = TRUE);
 297
 298   bool WaitOnConnect(long seconds = -1, long milliseconds = 0);
 299 };
 300
 301
 302 // --------------------------------------------------------------------------
 303 // wxDatagramSocket
 304 // --------------------------------------------------------------------------
 305
 306 // WARNING: still in alpha stage
 307
 308 class WXDLLEXPORT wxDatagramSocket : public wxSocketBase
 309 {
 310   DECLARE_CLASS(wxDatagramSocket)
 311
 312 public:
 313   wxDatagramSocket(wxSockAddress& addr, wxSocketFlags flags = wxSOCKET_NONE);
 314
 315   wxDatagramSocket& RecvFrom( wxSockAddress& addr,
 316                               void* buf,
 317                               wxUint32 nBytes );
 318   wxDatagramSocket& SendTo( wxSockAddress& addr,
 319                             const void* buf,
 320                             wxUint32 nBytes );
 321
 322 /* TODO:
 323   bool Connect(wxSockAddress& addr);
 324 */
 325 };
 326
 327
 328 // --------------------------------------------------------------------------
 329 // wxSocketEvent
 330 // --------------------------------------------------------------------------
 331
 332 class WXDLLEXPORT wxSocketEvent : public wxEvent
 333 {
 334 public:
 335   wxSocketEvent(int id = 0)
 336       : wxEvent(id, wxEVT_SOCKET)
 337       {
 338       }
 339
 340   wxSocketNotify  GetSocketEvent() const { return m_event; }
 341   wxSocketBase   *GetSocket() const      { return (wxSocketBase *) GetEventObject(); }
 342   void           *GetClientData() const  { return m_clientData; }
 343
 344   // backwards compatibility
 345 #if WXWIN_COMPATIBILITY_2
 346   wxSocketNotify  SocketEvent() const    { return m_event; }
 347   wxSocketBase   *Socket() const         { return (wxSocketBase *) GetEventObject(); }
 348 #endif // WXWIN_COMPATIBILITY_2
 349
 350   virtual wxEvent *Clone() const { return new wxSocketEvent(*this); }
 351
 352 public:
 353   wxSocketNotify  m_event;
 354   void           *m_clientData;
 355
 356   DECLARE_DYNAMIC_CLASS(wxSocketEvent)
 357 };
 358
 359
 360 typedef void (wxEvtHandler::*wxSocketEventFunction)(wxSocketEvent&);
 361
 362 #define EVT_SOCKET(id, func) \
 363     DECLARE_EVENT_TABLE_ENTRY( wxEVT_SOCKET, id, -1, \
 364                               (wxObjectEventFunction) \
 365                               (wxEventFunction) \
 366                               (wxSocketEventFunction) & func, \
 367                               (wxObject *) NULL ),
 368
 369
 370 #endif
 371   // wxUSE_SOCKETS
 372
 373 #endif
 374   // _WX_NETWORK_SOCKET_H