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 // event
  97 class WXDLLIMPEXP_FWD_NET wxSocketEvent;
  98 wxDECLARE_EXPORTED_EVENT(WXDLLIMPEXP_NET, wxEVT_SOCKET, wxSocketEvent)
  99
 100 // --------------------------------------------------------------------------
 101 // wxSocketBase
 102 // --------------------------------------------------------------------------
 103
 104 class WXDLLIMPEXP_NET wxSocketBase : public wxObject
 105 {
 106 public:
 107     // Public interface
 108     // ----------------
 109
 110     // ctors and dtors
 111     wxSocketBase();
 112     wxSocketBase(wxSocketFlags flags, wxSocketType type);
 113     virtual ~wxSocketBase();
 114     void Init();
 115     bool Destroy();
 116
 117     // state
 118     bool Ok() const { return IsOk(); }
 119     bool IsOk() const { return m_impl != NULL; }
 120     bool Error() const { return LastError() != wxSOCKET_NOERROR; }
 121     bool IsClosed() const { return m_closed; }
 122     bool IsConnected() const { return m_connected; }
 123     bool IsData() { return WaitForRead(0, 0); }
 124     bool IsDisconnected() const { return !IsConnected(); }
 125     wxUint32 LastCount() const { return m_lcount; }
 126     wxSocketError LastError() const;
 127     void SaveState();
 128     void RestoreState();
 129
 130     // addresses
 131     virtual bool GetLocal(wxSockAddress& addr_man) const;
 132     virtual bool GetPeer(wxSockAddress& addr_man) const;
 133     virtual bool SetLocal(const wxIPV4address& local);
 134
 135     // base IO
 136     virtual bool  Close();
 137     void ShutdownOutput();
 138     wxSocketBase& Discard();
 139     wxSocketBase& Peek(void* buffer, wxUint32 nbytes);
 140     wxSocketBase& Read(void* buffer, wxUint32 nbytes);
 141     wxSocketBase& ReadMsg(void *buffer, wxUint32 nbytes);
 142     wxSocketBase& Unread(const void *buffer, wxUint32 nbytes);
 143     wxSocketBase& Write(const void *buffer, wxUint32 nbytes);
 144     wxSocketBase& WriteMsg(const void *buffer, wxUint32 nbytes);
 145
 146     // all Wait() functions wait until their condition is satisfied or the
 147     // timeout expires; if seconds == -1 (default) then m_timeout value is used
 148     //
 149     // it is also possible to call InterruptWait() to cancel any current Wait()
 150
 151     // wait for anything at all to happen with this socket
 152     bool Wait(long seconds = -1, long milliseconds = 0);
 153
 154     // wait until we can read from or write to the socket without blocking
 155     // (notice that this does not mean that the operation will succeed but only
 156     // that it will return immediately)
 157     bool WaitForRead(long seconds = -1, long milliseconds = 0);
 158     bool WaitForWrite(long seconds = -1, long milliseconds = 0);
 159
 160     // wait until the connection is terminated
 161     bool WaitForLost(long seconds = -1, long milliseconds = 0);
 162
 163     void InterruptWait() { m_interrupt = true; }
 164
 165
 166     wxSocketFlags GetFlags() const { return m_flags; }
 167     void SetFlags(wxSocketFlags flags);
 168     virtual void SetTimeout(long seconds);
 169     long GetTimeout() const { return m_timeout; }
 170
 171     bool GetOption(int level, int optname, void *optval, int *optlen);
 172     bool SetOption(int level, int optname, const void *optval, int optlen);
 173     wxUint32 GetLastIOSize() const { return m_lcount; }
 174
 175     // event handling
 176     void *GetClientData() const { return m_clientData; }
 177     void SetClientData(void *data) { m_clientData = data; }
 178     void SetEventHandler(wxEvtHandler& handler, int id = wxID_ANY);
 179     void SetNotify(wxSocketEventFlags flags);
 180     void Notify(bool notify);
 181
 182     // initialize/shutdown the sockets (usually called automatically)
 183     static bool IsInitialized();
 184     static bool Initialize();
 185     static void Shutdown();
 186
 187
 188     // Implementation from now on
 189     // --------------------------
 190
 191     // do not use, should be private (called from wxSocketImpl only)
 192     void OnRequest(wxSocketNotify notify);
 193
 194     // do not use, not documented nor supported
 195     bool IsNoWait() const { return ((m_flags & wxSOCKET_NOWAIT) != 0); }
 196     wxSocketType GetType() const { return m_type; }
 197
 198 private:
 199     friend class wxSocketClient;
 200     friend class wxSocketServer;
 201     friend class wxDatagramSocket;
 202
 203     // low level IO
 204     wxUint32 DoRead(void* buffer, wxUint32 nbytes);
 205     wxUint32 DoWrite(const void *buffer, wxUint32 nbytes);
 206
 207     // wait until the given flags are set for this socket or the given timeout
 208     // (or m_timeout) expires
 209     //
 210     // notice that wxSOCKET_LOST_FLAG is always taken into account and the
 211     // function returns -1 if the connection was lost; otherwise it returns
 212     // true if any of the events specified by flags argument happened or false
 213     // if the timeout expired
 214     int DoWait(long timeout, wxSocketEventFlags flags);
 215
 216     // a helper calling DoWait() using the same convention as the public
 217     // WaitForXXX() functions use, i.e. use our timeout if seconds == -1 or the
 218     // specified timeout otherwise
 219     int DoWait(long seconds, long milliseconds, wxSocketEventFlags flags);
 220
 221     // another helper calling DoWait() using our m_timeout
 222     int DoWaitWithTimeout(wxSocketEventFlags flags)
 223     {
 224         return DoWait(m_timeout*1000, flags);
 225     }
 226
 227     // pushback buffer
 228     void     Pushback(const void *buffer, wxUint32 size);
 229     wxUint32 GetPushback(void *buffer, wxUint32 size, bool peek);
 230
 231     // store the given error as the LastError()
 232     void SetError(wxSocketError error);
 233
 234 private:
 235     // socket
 236     wxSocketImpl *m_impl;             // port-specific implementation
 237     wxSocketType  m_type;             // wxSocket type
 238
 239     // state
 240     wxSocketFlags m_flags;            // wxSocket flags
 241     bool          m_connected;        // connected?
 242     bool          m_establishing;     // establishing connection?
 243     bool          m_reading;          // busy reading?
 244     bool          m_writing;          // busy writing?
 245     bool          m_closed;           // was the other end closed?
 246     wxUint32      m_lcount;           // last IO transaction size
 247     unsigned long m_timeout;          // IO timeout value in seconds
 248                                       // (TODO: remove, wxSocketImpl has it too)
 249     wxList        m_states;           // stack of states (TODO: remove!)
 250     bool          m_interrupt;        // interrupt ongoing wait operations?
 251     bool          m_beingDeleted;     // marked for delayed deletion?
 252     wxIPV4address m_localAddress;     // bind to local address?
 253
 254     // pushback buffer
 255     void         *m_unread;           // pushback buffer
 256     wxUint32      m_unrd_size;        // pushback buffer size
 257     wxUint32      m_unrd_cur;         // pushback pointer (index into buffer)
 258
 259     // events
 260     int           m_id;               // socket id
 261     wxEvtHandler *m_handler;          // event handler
 262     void         *m_clientData;       // client data for events
 263     bool          m_notify;           // notify events to users?
 264     wxSocketEventFlags  m_eventmask;  // which events to notify?
 265     wxSocketEventFlags  m_eventsgot;  // collects events received in OnRequest()
 266
 267     // the initialization count, wxSocket is initialized if > 0
 268     static size_t m_countInit;
 269
 270
 271     friend class wxSocketReadGuard;
 272     friend class wxSocketWriteGuard;
 273
 274     DECLARE_NO_COPY_CLASS(wxSocketBase)
 275     DECLARE_CLASS(wxSocketBase)
 276 };
 277
 278
 279 // --------------------------------------------------------------------------
 280 // wxSocketServer
 281 // --------------------------------------------------------------------------
 282
 283 class WXDLLIMPEXP_NET wxSocketServer : public wxSocketBase
 284 {
 285 public:
 286     wxSocketServer(const wxSockAddress& addr,
 287                    wxSocketFlags flags = wxSOCKET_NONE);
 288
 289     wxSocketBase* Accept(bool wait = true);
 290     bool AcceptWith(wxSocketBase& socket, bool wait = true);
 291
 292     bool WaitForAccept(long seconds = -1, long milliseconds = 0);
 293
 294     DECLARE_NO_COPY_CLASS(wxSocketServer)
 295     DECLARE_CLASS(wxSocketServer)
 296 };
 297
 298
 299 // --------------------------------------------------------------------------
 300 // wxSocketClient
 301 // --------------------------------------------------------------------------
 302
 303 class WXDLLIMPEXP_NET wxSocketClient : public wxSocketBase
 304 {
 305 public:
 306     wxSocketClient(wxSocketFlags flags = wxSOCKET_NONE);
 307
 308     virtual bool Connect(const wxSockAddress& addr, bool wait = true);
 309     bool Connect(const wxSockAddress& addr,
 310                  const wxSockAddress& local,
 311                  bool wait = true);
 312
 313     bool WaitOnConnect(long seconds = -1, long milliseconds = 0);
 314
 315     // Sets initial socket buffer sizes using the SO_SNDBUF and SO_RCVBUF
 316     // options before calling connect (either one can be -1 to leave it
 317     // unchanged)
 318     void SetInitialSocketBuffers(int recv, int send)
 319     {
 320         m_initialRecvBufferSize = recv;
 321         m_initialSendBufferSize = send;
 322     }
 323
 324 private:
 325     virtual bool DoConnect(const wxSockAddress& addr,
 326                            const wxSockAddress* local,
 327                            bool wait = true);
 328
 329     // buffer sizes, -1 if unset and defaults should be used
 330     int m_initialRecvBufferSize;
 331     int m_initialSendBufferSize;
 332
 333     DECLARE_NO_COPY_CLASS(wxSocketClient)
 334     DECLARE_CLASS(wxSocketClient)
 335 };
 336
 337
 338 // --------------------------------------------------------------------------
 339 // wxDatagramSocket
 340 // --------------------------------------------------------------------------
 341
 342 // WARNING: still in alpha stage
 343
 344 class WXDLLIMPEXP_NET wxDatagramSocket : public wxSocketBase
 345 {
 346 public:
 347     wxDatagramSocket(const wxSockAddress& addr,
 348                      wxSocketFlags flags = wxSOCKET_NONE);
 349
 350     wxDatagramSocket& RecvFrom(wxSockAddress& addr,
 351                                void *buf,
 352                                wxUint32 nBytes);
 353     wxDatagramSocket& SendTo(const wxSockAddress& addr,
 354                              const void* buf,
 355                              wxUint32 nBytes);
 356
 357     /* TODO:
 358        bool Connect(wxSockAddress& addr);
 359      */
 360
 361 private:
 362     DECLARE_NO_COPY_CLASS(wxDatagramSocket)
 363     DECLARE_CLASS(wxDatagramSocket)
 364 };
 365
 366
 367 // --------------------------------------------------------------------------
 368 // wxSocketEvent
 369 // --------------------------------------------------------------------------
 370
 371 class WXDLLIMPEXP_NET wxSocketEvent : public wxEvent
 372 {
 373 public:
 374     wxSocketEvent(int id = 0)
 375         : wxEvent(id, wxEVT_SOCKET)
 376     {
 377     }
 378
 379     wxSocketNotify GetSocketEvent() const { return m_event; }
 380     wxSocketBase *GetSocket() const
 381         { return (wxSocketBase *) GetEventObject(); }
 382     void *GetClientData() const { return m_clientData; }
 383
 384     virtual wxEvent *Clone() const { return new wxSocketEvent(*this); }
 385     virtual wxEventCategory GetEventCategory() const { return wxEVT_CATEGORY_SOCKET; }
 386
 387 public:
 388     wxSocketNotify  m_event;
 389     void           *m_clientData;
 390
 391     DECLARE_DYNAMIC_CLASS_NO_ASSIGN(wxSocketEvent)
 392 };
 393
 394
 395 typedef void (wxEvtHandler::*wxSocketEventFunction)(wxSocketEvent&);
 396
 397 #define wxSocketEventHandler(func) \
 398     wxEVENT_HANDLER_CAST(wxSocketEventFunction, func)
 399
 400 #define EVT_SOCKET(id, func) \
 401     wx__DECLARE_EVT1(wxEVT_SOCKET, id, wxSocketEventHandler(func))
 402
 403 #endif // wxUSE_SOCKETS
 404
 405 #endif // _WX_SOCKET_H_
 406