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