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_SOCKET_H_
  13 #define _WX_SOCKET_H_
  14
  15 #include "wx/defs.h"
  16
  17 #if wxUSE_SOCKETS
  18
  19 // ---------------------------------------------------------------------------
  20 // wxSocket headers
  21 // ---------------------------------------------------------------------------
  22
  23 #include "wx/event.h"
  24 #include "wx/sckaddr.h"
  25 #include "wx/list.h"
  26
  27 class wxSocketImpl;
  28
  29 // ------------------------------------------------------------------------
  30 // Types and constants
  31 // ------------------------------------------------------------------------
  32
  33 // Types of different socket notifications or events.
  34 //
  35 // NB: the values here should be consecutive and start with 0 as they are
  36 //     used to construct the wxSOCKET_XXX_FLAG bit mask values below
  37 enum wxSocketNotify
  38 {
  39     wxSOCKET_INPUT,
  40     wxSOCKET_OUTPUT,
  41     wxSOCKET_CONNECTION,
  42     wxSOCKET_LOST,
  43     wxSOCKET_MAX_EVENT
  44 };
  45
  46 enum
  47 {
  48     wxSOCKET_INPUT_FLAG = 1 << wxSOCKET_INPUT,
  49     wxSOCKET_OUTPUT_FLAG = 1 << wxSOCKET_OUTPUT,
  50     wxSOCKET_CONNECTION_FLAG = 1 << wxSOCKET_CONNECTION,
  51     wxSOCKET_LOST_FLAG = 1 << wxSOCKET_LOST
  52 };
  53
  54 // this is a combination of the bit masks defined above
  55 typedef int wxSocketEventFlags;
  56
  57 enum wxSocketError
  58 {
  59     wxSOCKET_NOERROR = 0,
  60     wxSOCKET_INVOP,
  61     wxSOCKET_IOERR,
  62     wxSOCKET_INVADDR,
  63     wxSOCKET_INVSOCK,
  64     wxSOCKET_NOHOST,
  65     wxSOCKET_INVPORT,
  66     wxSOCKET_WOULDBLOCK,
  67     wxSOCKET_TIMEDOUT,
  68     wxSOCKET_MEMERR,
  69     wxSOCKET_OPTERR
  70 };
  71
  72 // socket options/flags bit masks
  73 enum
  74 {
  75     wxSOCKET_NONE = 0,
  76     wxSOCKET_NOWAIT = 1,
  77     wxSOCKET_WAITALL = 2,
  78     wxSOCKET_BLOCK = 4,
  79     wxSOCKET_REUSEADDR = 8,
  80     wxSOCKET_BROADCAST = 16,
  81     wxSOCKET_NOBIND = 32
  82 };
  83
  84 typedef int wxSocketFlags;
  85
  86 // socket kind values (badly defined, don't use)
  87 enum wxSocketType
  88 {
  89     wxSOCKET_UNINIT,
  90     wxSOCKET_CLIENT,
  91     wxSOCKET_SERVER,
  92     wxSOCKET_BASE,
  93     wxSOCKET_DATAGRAM
  94 };
  95
  96
  97
  98 // --------------------------------------------------------------------------
  99 // wxSocketBase
 100 // --------------------------------------------------------------------------
 101
 102 class WXDLLIMPEXP_NET wxSocketBase : public wxObject
 103 {
 104 public:
 105
 106   // Public interface
 107   // ----------------
 108
 109   // ctors and dtors
 110   wxSocketBase();
 111   wxSocketBase(wxSocketFlags flags, wxSocketType type);
 112   virtual ~wxSocketBase();
 113   void Init();
 114   bool Destroy();
 115
 116   // state
 117   bool Ok() const { return IsOk(); }
 118   bool IsOk() const { return m_impl != NULL; }
 119   bool Error() const { return LastError() != wxSOCKET_NOERROR; }
 120   bool IsClosed() const { return m_closed; }
 121   bool IsConnected() const { return m_connected; }
 122   bool IsData() { return WaitForRead(0, 0); }
 123   bool IsDisconnected() const { return !IsConnected(); }
 124   wxUint32 LastCount() const { return m_lcount; }
 125   wxSocketError LastError() const;
 126   void SaveState();
 127   void RestoreState();
 128
 129   // addresses
 130   virtual bool GetLocal(wxSockAddress& addr_man) const;
 131   virtual bool GetPeer(wxSockAddress& addr_man) const;
 132   virtual bool SetLocal(const wxIPV4address& local);
 133
 134   // base IO
 135   virtual bool  Close();
 136   wxSocketBase& Discard();
 137   wxSocketBase& Peek(void* buffer, wxUint32 nbytes);
 138   wxSocketBase& Read(void* buffer, wxUint32 nbytes);
 139   wxSocketBase& ReadMsg(void *buffer, wxUint32 nbytes);
 140   wxSocketBase& Unread(const void *buffer, wxUint32 nbytes);
 141   wxSocketBase& Write(const void *buffer, wxUint32 nbytes);
 142   wxSocketBase& WriteMsg(const void *buffer, wxUint32 nbytes);
 143
 144   // all Wait() functions wait until their condition is satisfied or the
 145   // timeout expires; if seconds == -1 (default) then m_timeout value is used
 146   //
 147   // it is also possible to call InterruptWait() to cancel any current Wait()
 148
 149   // wait for anything at all to happen with this socket
 150   bool Wait(long seconds = -1, long milliseconds = 0);
 151
 152   // wait until we can read from or write to the socket without blocking
 153   // (notice that this does not mean that the operation will succeed but only
 154   // that it will return immediately)
 155   bool WaitForRead(long seconds = -1, long milliseconds = 0);
 156   bool WaitForWrite(long seconds = -1, long milliseconds = 0);
 157
 158   // wait until the connection is terminated
 159   bool WaitForLost(long seconds = -1, long milliseconds = 0);
 160
 161   void InterruptWait() { m_interrupt = true; }
 162
 163
 164   wxSocketFlags GetFlags() const { return m_flags; }
 165   void SetFlags(wxSocketFlags flags);
 166   void SetTimeout(long seconds);
 167   long GetTimeout() const { return m_timeout; }
 168
 169   bool GetOption(int level, int optname, void *optval, int *optlen);
 170   bool SetOption(int level, int optname, const void *optval, int optlen);
 171   wxUint32 GetLastIOSize() const { return m_lcount; }
 172
 173   // event handling
 174   void *GetClientData() const { return m_clientData; }
 175   void SetClientData(void *data) { m_clientData = data; }
 176   void SetEventHandler(wxEvtHandler& handler, int id = wxID_ANY);
 177   void SetNotify(wxSocketEventFlags flags);
 178   void Notify(bool notify);
 179
 180   // initialize/shutdown the sockets (usually called automatically)
 181   static bool IsInitialized();
 182   static bool Initialize();
 183   static void Shutdown();
 184
 185
 186   // Implementation from now on
 187   // --------------------------
 188
 189   // do not use, should be private (called from wxSocketImpl only)
 190   void OnRequest(wxSocketNotify notify);
 191
 192   // do not use, not documented nor supported
 193   bool IsNoWait() const { return ((m_flags & wxSOCKET_NOWAIT) != 0); }
 194   wxSocketType GetType() const { return m_type; }
 195
 196 private:
 197   friend class wxSocketClient;
 198   friend class wxSocketServer;
 199   friend class wxDatagramSocket;
 200
 201   // low level IO
 202   wxUint32 DoRead(void* buffer, wxUint32 nbytes);
 203   wxUint32 DoWrite(const void *buffer, wxUint32 nbytes);
 204
 205   // wait until the given flags are set for this socket or the given timeout
 206   // (or m_timeout) expires
 207   //
 208   // notice that wxSOCKET_LOST_FLAG is always taken into account but the return
 209   // value depends on whether it is included in flags or not: if it is, and the
 210   // connection is indeed lost, true is returned, but if it isn't then the
 211   // function returns false in this case
 212   //
 213   // false is always returned if we returned because of the timeout expiration
 214   bool DoWait(long seconds, long milliseconds, wxSocketEventFlags flags);
 215
 216   // pushback buffer
 217   void     Pushback(const void *buffer, wxUint32 size);
 218   wxUint32 GetPushback(void *buffer, wxUint32 size, bool peek);
 219
 220   // store the given error as the LastError()
 221   void SetError(wxSocketError error);
 222
 223 private:
 224   // socket
 225   wxSocketImpl *m_impl;             // port-specific implementation
 226   wxSocketType  m_type;             // wxSocket type
 227
 228   // state
 229   wxSocketFlags m_flags;            // wxSocket flags
 230   bool          m_connected;        // connected?
 231   bool          m_establishing;     // establishing connection?
 232   bool          m_reading;          // busy reading?
 233   bool          m_writing;          // busy writing?
 234   bool          m_closed;           // was the other end closed?
 235   wxUint32      m_lcount;           // last IO transaction size
 236   unsigned long m_timeout;          // IO timeout value in seconds
 237   wxList        m_states;           // stack of states
 238   bool          m_interrupt;        // interrupt ongoing wait operations?
 239   bool          m_beingDeleted;     // marked for delayed deletion?
 240   wxIPV4address m_localAddress;     // bind to local address?
 241
 242   // pushback buffer
 243   void         *m_unread;           // pushback buffer
 244   wxUint32      m_unrd_size;        // pushback buffer size
 245   wxUint32      m_unrd_cur;         // pushback pointer (index into buffer)
 246
 247   // events
 248   int           m_id;               // socket id
 249   wxEvtHandler *m_handler;          // event handler
 250   void         *m_clientData;       // client data for events
 251   bool          m_notify;           // notify events to users?
 252   wxSocketEventFlags  m_eventmask;  // which events to notify?
 253   wxSocketEventFlags  m_eventsgot;  // collects events received in OnRequest()
 254
 255   // the initialization count, GSocket is initialized if > 0
 256   static size_t m_countInit;
 257
 258   DECLARE_NO_COPY_CLASS(wxSocketBase)
 259   DECLARE_CLASS(wxSocketBase)
 260 };
 261
 262
 263 // --------------------------------------------------------------------------
 264 // wxSocketServer
 265 // --------------------------------------------------------------------------
 266
 267 class WXDLLIMPEXP_NET wxSocketServer : public wxSocketBase
 268 {
 269   DECLARE_CLASS(wxSocketServer)
 270
 271 public:
 272   wxSocketServer(const wxSockAddress& addr, wxSocketFlags flags = wxSOCKET_NONE);
 273
 274   wxSocketBase* Accept(bool wait = true);
 275   bool AcceptWith(wxSocketBase& socket, bool wait = true);
 276
 277   bool WaitForAccept(long seconds = -1, long milliseconds = 0);
 278
 279   DECLARE_NO_COPY_CLASS(wxSocketServer)
 280 };
 281
 282
 283 // --------------------------------------------------------------------------
 284 // wxSocketClient
 285 // --------------------------------------------------------------------------
 286
 287 class WXDLLIMPEXP_NET wxSocketClient : public wxSocketBase
 288 {
 289   DECLARE_CLASS(wxSocketClient)
 290
 291 public:
 292   wxSocketClient(wxSocketFlags flags = wxSOCKET_NONE);
 293   virtual ~wxSocketClient();
 294
 295   virtual bool Connect(const wxSockAddress& addr, bool wait = true);
 296   bool Connect(const wxSockAddress& addr, const wxSockAddress& local,
 297                bool wait = true);
 298
 299   bool WaitOnConnect(long seconds = -1, long milliseconds = 0);
 300
 301   // Sets initial socket buffer sizes using the SO_SNDBUF and SO_RCVBUF options
 302   // before calling connect (either one can be -1 to leave it unchanged)
 303   void SetInitialSocketBuffers(int recv, int send)
 304   {
 305       m_initialRecvBufferSize = recv;
 306       m_initialSendBufferSize = send;
 307   }
 308
 309 private:
 310   virtual bool DoConnect(const wxSockAddress& addr,
 311                          const wxSockAddress* local,
 312                          bool wait = true);
 313
 314   // buffer sizes, -1 if unset and defaults should be used
 315   int m_initialRecvBufferSize;
 316   int m_initialSendBufferSize;
 317
 318   DECLARE_NO_COPY_CLASS(wxSocketClient)
 319 };
 320
 321
 322 // --------------------------------------------------------------------------
 323 // wxDatagramSocket
 324 // --------------------------------------------------------------------------
 325
 326 // WARNING: still in alpha stage
 327
 328 class WXDLLIMPEXP_NET wxDatagramSocket : public wxSocketBase
 329 {
 330   DECLARE_CLASS(wxDatagramSocket)
 331
 332 public:
 333   wxDatagramSocket(const wxSockAddress& addr, wxSocketFlags flags = wxSOCKET_NONE);
 334
 335   wxDatagramSocket& RecvFrom( wxSockAddress& addr,
 336                               void* buf,
 337                               wxUint32 nBytes );
 338   wxDatagramSocket& SendTo( const wxSockAddress& addr,
 339                             const void* buf,
 340                             wxUint32 nBytes );
 341
 342 /* TODO:
 343   bool Connect(wxSockAddress& addr);
 344 */
 345   DECLARE_NO_COPY_CLASS(wxDatagramSocket)
 346 };
 347
 348
 349 // --------------------------------------------------------------------------
 350 // wxSocketEvent
 351 // --------------------------------------------------------------------------
 352
 353 class WXDLLIMPEXP_NET wxSocketEvent : public wxEvent
 354 {
 355 public:
 356   wxSocketEvent(int id = 0)
 357       : wxEvent(id, wxEVT_SOCKET)
 358       {
 359       }
 360
 361   wxSocketNotify  GetSocketEvent() const { return m_event; }
 362   wxSocketBase   *GetSocket() const      { return (wxSocketBase *) GetEventObject(); }
 363   void           *GetClientData() const  { return m_clientData; }
 364
 365   virtual wxEvent *Clone() const { return new wxSocketEvent(*this); }
 366
 367 public:
 368   wxSocketNotify  m_event;
 369   void           *m_clientData;
 370
 371   DECLARE_DYNAMIC_CLASS_NO_ASSIGN(wxSocketEvent)
 372 };
 373
 374
 375 typedef void (wxEvtHandler::*wxSocketEventFunction)(wxSocketEvent&);
 376
 377 #define wxSocketEventHandler(func) \
 378     (wxObjectEventFunction)(wxEventFunction)wxStaticCastEvent(wxSocketEventFunction, &func)
 379
 380 #define EVT_SOCKET(id, func) \
 381     wx__DECLARE_EVT1(wxEVT_SOCKET, id, wxSocketEventHandler(func))
 382
 383 #endif // wxUSE_SOCKETS
 384
 385 #endif // _WX_SOCKET_H_
 386