src/common/socket.cpp

   1 ////////////////////////////////////////////////////////////////////////////////
   2 // Name:       socket.cpp
   3 // Purpose:    Socket handler classes
   4 // Authors:    Guilhem Lavaux
   5 // Created:    April 1997
   6 // Updated:    July 1999
   7 // Copyright:  (C) 1999, 1998, 1997, Guilhem Lavaux
   8 // RCS_ID:     $Id$
   9 // License:    see wxWindows license
  10 ////////////////////////////////////////////////////////////////////////////////
  11 #ifdef __GNUG__
  12 #pragma implementation "socket.h"
  13 #endif
  14
  15 // For compilers that support precompilation, includes "wx.h".
  16 #include "wx/wxprec.h"
  17
  18 #ifdef __BORLANDC__
  19 #pragma hdrstop
  20 #endif
  21
  22 #if wxUSE_SOCKETS
  23
  24 /////////////////////////////////////////////////////////////////////////////
  25 // wxWindows headers
  26 /////////////////////////////////////////////////////////////////////////////
  27 #include <wx/defs.h>
  28 #include <wx/object.h>
  29 #include <wx/string.h>
  30 #include <wx/timer.h>
  31 #include <wx/utils.h>
  32 #include <wx/log.h>
  33
  34 #include <stdlib.h>
  35 #include <string.h>
  36 #include <ctype.h>
  37
  38 /////////////////////////////////////////////////////////////////////////////
  39 // wxSocket headers
  40 /////////////////////////////////////////////////////////////////////////////
  41 #include <wx/module.h>
  42 #include <wx/sckaddr.h>
  43 #include <wx/socket.h>
  44
  45 // --------------------------------------------------------------
  46 // ClassInfos
  47 // --------------------------------------------------------------
  48 #if !USE_SHARED_LIBRARY
  49 IMPLEMENT_CLASS(wxSocketBase, wxObject)
  50 IMPLEMENT_CLASS(wxSocketServer, wxSocketBase)
  51 IMPLEMENT_CLASS(wxSocketClient, wxSocketBase)
  52 IMPLEMENT_DYNAMIC_CLASS(wxSocketEvent, wxEvent)
  53 #endif
  54
  55 class wxSocketState : public wxObject {
  56 public:
  57   bool notify_state;
  58   GSocketEventFlags evt_notify_state;
  59   wxSocketBase::wxSockFlags socket_flags;
  60   wxSocketBase::wxSockCbk c_callback;
  61   char *c_callback_data;
  62
  63 public:
  64   wxSocketState() : wxObject() {}
  65 };
  66
  67 // --------------------------------------------------------------
  68 // --------- wxSocketBase CONSTRUCTOR ---------------------------
  69 // --------------------------------------------------------------
  70 wxSocketBase::wxSocketBase(wxSocketBase::wxSockFlags _flags,
  71          wxSocketBase::wxSockType _type) :
  72   wxEvtHandler(),
  73   m_socket(NULL), m_flags(_flags), m_type(_type),
  74   m_neededreq(GSOCK_INPUT_FLAG | GSOCK_LOST_FLAG),
  75   m_lcount(0), m_timeout(600),
  76   m_unread(NULL), m_unrd_size(0), m_unrd_cur(0),
  77   m_cbk(NULL), m_cdata(NULL),
  78   m_connected(FALSE), m_notify_state(FALSE), m_id(-1),
  79   m_defering(NO_DEFER),
  80   m_states()
  81 {
  82 }
  83
  84 wxSocketBase::wxSocketBase() :
  85   wxEvtHandler(),
  86   m_socket(NULL), m_flags(SPEED | WAITALL), m_type(SOCK_UNINIT),
  87   m_neededreq(GSOCK_INPUT_FLAG | GSOCK_LOST_FLAG),
  88   m_lcount(0), m_timeout(600),
  89   m_unread(NULL), m_unrd_size(0), m_unrd_cur(0),
  90   m_cbk(NULL), m_cdata(NULL),
  91   m_connected(FALSE), m_notify_state(FALSE), m_id(-1),
  92   m_defering(NO_DEFER),
  93   m_states()
  94 {
  95 }
  96
  97 // --------------------------------------------------------------
  98 // wxSocketBase destructor
  99 // --------------------------------------------------------------
 100
 101 wxSocketBase::~wxSocketBase()
 102 {
 103   if (m_unread)
 104     free(m_unread);
 105
 106   // At last, close the file descriptor.
 107   Close();
 108
 109   if (m_socket)
 110     GSocket_destroy(m_socket);
 111 }
 112
 113 bool wxSocketBase::Close()
 114 {
 115   if (m_socket)
 116   {
 117     if (m_notify_state == TRUE)
 118       Notify(FALSE);
 119
 120     // Shutdown the connection.
 121     GSocket_Shutdown(m_socket);
 122     m_connected = FALSE;
 123   }
 124
 125   return TRUE;
 126 }
 127
 128 // --------------------------------------------------------------
 129 // wxSocketBase base IO function
 130 // --------------------------------------------------------------
 131 class _wxSocketInternalTimer: public wxTimer {
 132  public:
 133   int *m_state;
 134   unsigned long m_new_val;
 135
 136   void Notify()
 137      {
 138         *m_state = m_new_val;  // Change the value
 139      }
 140 };
 141
 142 int wxSocketBase::DeferRead(char *buffer, size_t nbytes)
 143 {
 144   GSocketEventFlags old_event_flags;
 145   bool old_notify_state;
 146   // Timer for timeout
 147   _wxSocketInternalTimer timer;
 148
 149   wxASSERT(m_defering == NO_DEFER);
 150
 151   // Set the defering mode to READ.
 152   m_defering = DEFER_READ;
 153
 154   // Save the old state.
 155   old_event_flags = NeededReq();
 156   old_notify_state = m_notify_state;
 157
 158   // Set the new async flag.
 159   SetNotify(GSOCK_INPUT_FLAG | GSOCK_LOST_FLAG);
 160   Notify(TRUE);
 161
 162   // Set the current buffer.
 163   m_defer_buffer = buffer;
 164   m_defer_nbytes = nbytes;
 165   m_defer_timer  = &timer;
 166
 167   timer.m_state = (int *)&m_defer_buffer;
 168   timer.m_new_val = 0;
 169
 170   timer.Start(m_timeout * 1000, FALSE);
 171
 172   // Wait for buffer completion.
 173   while (m_defer_buffer != NULL)
 174     wxYield();
 175
 176   timer.Stop();
 177
 178   // Restore the old state.
 179   Notify(old_notify_state);
 180   SetNotify(old_event_flags);
 181
 182   // Disable defering mode.
 183   m_defering = NO_DEFER;
 184   m_defer_timer = NULL;
 185
 186   // Return the number of bytes read from the socket.
 187   return nbytes-m_defer_nbytes;
 188 }
 189
 190 wxSocketBase& wxSocketBase::Read(char* buffer, size_t nbytes)
 191 {
 192   int ret = 1;
 193
 194   m_lcount = GetPushback(buffer, nbytes, FALSE);
 195   nbytes -= m_lcount;
 196   buffer += m_lcount;
 197
 198   if (!m_connected)
 199     return *this;
 200
 201   // If we have got the whole needed buffer or if we don't want to
 202   // wait then it returns immediately.
 203   if (!nbytes || (m_lcount && !(m_flags & WAITALL)) ) {
 204     return *this;
 205   }
 206
 207   if ((m_flags & SPEED) != 0) {
 208
 209     if ((m_flags & WAITALL) != 0) {
 210       while (ret > 0 && nbytes > 0) {
 211         ret = GSocket_Read(m_socket, buffer, nbytes);
 212         m_lcount += ret;
 213         buffer += ret;
 214         nbytes -= ret;
 215       }
 216     // In case the last call was an error ...
 217       if (ret < 0)
 218         m_lcount ++;
 219     } else {
 220       ret = GSocket_Read(m_socket, buffer, nbytes);
 221       if (ret > 0)
 222         m_lcount += ret;
 223     }
 224
 225   } else {
 226     ret = DeferRead(buffer, nbytes);
 227
 228     if (ret > 0)
 229       m_lcount += ret;
 230   }
 231
 232   return *this;
 233 }
 234
 235 wxSocketBase& wxSocketBase::ReadMsg(char* buffer, size_t nbytes)
 236 {
 237   unsigned long len, len2, sig;
 238   struct {
 239     char sig[4];
 240     char len[4];
 241   } msg;
 242
 243   // sig should be an explicit 32-bit unsigned integer; I've seen
 244   // compilers in which size_t was actually a 16-bit unsigned integer
 245
 246   Read((char *)&msg, sizeof(msg));
 247   if (m_lcount != sizeof(msg))
 248     return *this;
 249
 250   sig = msg.sig[0] & 0xff;
 251   sig |= (size_t)(msg.sig[1] & 0xff) << 8;
 252   sig |= (size_t)(msg.sig[2] & 0xff) << 16;
 253   sig |= (size_t)(msg.sig[3] & 0xff) << 24;
 254
 255   if (sig != 0xfeeddead)
 256     return *this;
 257   len = msg.len[0] & 0xff;
 258   len |= (size_t)(msg.len[1] & 0xff) << 8;
 259   len |= (size_t)(msg.len[2] & 0xff) << 16;
 260   len |= (size_t)(msg.len[3] & 0xff) << 24;
 261
 262   // len2 is incorrectly computed in the original; this sequence is
 263   // the fix
 264   if (len > nbytes) {
 265     len2 = len - nbytes;
 266     len = nbytes;
 267   }
 268   else
 269     len2 = 0;
 270
 271   // the "len &&" in the following statement is necessary so that
 272   // we don't attempt to read (and possibly hang the system)
 273   // if the message was zero bytes long
 274   if (len && Read(buffer, len).LastCount() != len)
 275     return *this;
 276   if (len2 && (Read(NULL, len2).LastCount() != len2))
 277     return *this;
 278   if (Read((char *)&msg, sizeof(msg)).LastCount() != sizeof(msg))
 279     return *this;
 280
 281   sig = msg.sig[0] & 0xff;
 282   sig |= (size_t)(msg.sig[1] & 0xff) << 8;
 283   sig |= (size_t)(msg.sig[2] & 0xff) << 16;
 284   sig |= (size_t)(msg.sig[3] & 0xff) << 24;
 285
 286 // ERROR
 287   if (sig != 0xdeadfeed)
 288     wxLogDebug(_T("Warning: invalid signature returned to ReadMsg\n"));
 289
 290   return *this;
 291 }
 292
 293 wxSocketBase& wxSocketBase::Peek(char* buffer, size_t nbytes)
 294 {
 295   Read(buffer, nbytes);
 296   CreatePushbackAfter(buffer, nbytes);
 297
 298   return *this;
 299 }
 300
 301 int wxSocketBase::DeferWrite(const char *buffer, size_t nbytes)
 302 {
 303   GSocketEventFlags old_event_flags;
 304   bool old_notify_state;
 305   // Timer for timeout
 306   _wxSocketInternalTimer timer;
 307
 308   wxASSERT(m_defering == NO_DEFER);
 309
 310   m_defering = DEFER_WRITE;
 311
 312   // Save the old state
 313   old_event_flags = NeededReq();
 314   old_notify_state = m_notify_state;
 315
 316   SetNotify(GSOCK_OUTPUT_FLAG | GSOCK_LOST_FLAG);
 317   Notify(TRUE);
 318
 319   // Set the current buffer
 320   m_defer_buffer = (char *)buffer;
 321   m_defer_nbytes = nbytes;
 322
 323   // Start timer
 324   timer.m_state   = (int *)&m_defer_buffer;
 325   timer.m_new_val = 0;
 326
 327   m_defer_timer   = &timer;
 328   timer.Start(m_timeout * 1000, FALSE);
 329
 330   while (m_defer_buffer != NULL)
 331     wxYield();
 332
 333   // Stop timer
 334   m_defer_timer = NULL;
 335   timer.Stop();
 336
 337   // Restore the old state
 338   Notify(old_notify_state);
 339   SetNotify(old_event_flags);
 340
 341   m_defering = NO_DEFER;
 342
 343   return nbytes-m_defer_nbytes;
 344 }
 345
 346 wxSocketBase& wxSocketBase::Write(const char *buffer, size_t nbytes)
 347 {
 348   int ret;
 349
 350   if ((m_flags & SPEED) != 0)
 351     ret = GSocket_Write(m_socket, buffer, nbytes);
 352   else
 353     ret = DeferWrite(buffer, nbytes);
 354
 355   if (ret != -1)
 356     m_lcount += ret;
 357
 358   return *this;
 359 }
 360
 361 wxSocketBase& wxSocketBase::WriteMsg(const char *buffer, size_t nbytes)
 362 {
 363   struct {
 364     char sig[4];
 365     char len[4];
 366   } msg;
 367
 368   // warning about 'cast truncates constant value'
 369 #ifdef __VISUALC__
 370     #pragma warning(disable: 4310)
 371 #endif // __VISUALC__
 372
 373   msg.sig[0] = (char) 0xad;
 374   msg.sig[1] = (char) 0xde;
 375   msg.sig[2] = (char) 0xed;
 376   msg.sig[3] = (char) 0xfe;
 377
 378     msg.len[0] = (char) nbytes & 0xff;
 379   msg.len[1] = (char) (nbytes >> 8) & 0xff;
 380   msg.len[2] = (char) (nbytes >> 16) & 0xff;
 381   msg.len[3] = (char) (nbytes >> 24) & 0xff;
 382
 383   if (Write((char *)&msg, sizeof(msg)).LastCount() < sizeof(msg))
 384     return *this;
 385   if (Write(buffer, nbytes).LastCount() < nbytes)
 386     return *this;
 387
 388   msg.sig[0] = (char) 0xed;
 389   msg.sig[1] = (char) 0xfe;
 390   msg.sig[2] = (char) 0xad;
 391   msg.sig[3] = (char) 0xde;
 392   msg.len[0] = msg.len[1] = msg.len[2] = msg.len[3] = (char) 0;
 393   Write((char *)&msg, sizeof(msg));
 394
 395   return *this;
 396
 397 #ifdef __VISUALC__
 398     #pragma warning(default: 4310)
 399 #endif // __VISUALC__
 400 }
 401
 402 wxSocketBase& wxSocketBase::Unread(const char *buffer, size_t nbytes)
 403 {
 404   m_lcount = 0;
 405   if (nbytes != 0) {
 406     CreatePushbackAfter(buffer, nbytes);
 407     m_lcount = nbytes;
 408   }
 409   return *this;
 410 }
 411
 412 bool wxSocketBase::IsData() const
 413 {
 414   if (!m_socket)
 415     return FALSE;
 416
 417   return (GSocket_DataAvailable(m_socket));
 418 }
 419
 420 void wxSocketBase::DoDefer(GSocketEvent req_evt)
 421 {
 422   int ret;
 423
 424   if (req_evt == GSOCK_LOST) {
 425     Close();
 426     m_defer_buffer = NULL;
 427     return;
 428   }
 429   switch (m_defering) {
 430   case DEFER_READ:
 431     ret = GSocket_Read(m_socket, m_defer_buffer, m_defer_nbytes);
 432     break;
 433   case DEFER_WRITE:
 434     ret = GSocket_Write(m_socket, m_defer_buffer, m_defer_nbytes);
 435     break;
 436   default:
 437     ret = -1;
 438     break;
 439   }
 440
 441   m_defer_nbytes -= ret;
 442
 443   if (ret < 0)
 444     m_defer_nbytes++;
 445
 446   // If we are waiting for all bytes to be acquired, keep the defering modei
 447   // enabled.
 448   if ((m_flags & WAITALL) == 0 || m_defer_nbytes == 0 || ret < 0) {
 449     m_defer_buffer = NULL;
 450     Notify(FALSE);
 451   } else {
 452     m_defer_buffer += ret;
 453     m_defer_timer->Start(m_timeout * 1000, FALSE);
 454   }
 455 }
 456
 457 // ---------------------------------------------------------------------
 458 // --------- wxSocketBase Discard(): deletes all byte in the input queue
 459 // ---------------------------------------------------------------------
 460 void wxSocketBase::Discard()
 461 {
 462 #define MAX_BUFSIZE (10*1024)
 463   char *my_data = new char[MAX_BUFSIZE];
 464   size_t recv_size = MAX_BUFSIZE;
 465
 466   SaveState();
 467   SetFlags(NOWAIT | SPEED);
 468
 469   while (recv_size == MAX_BUFSIZE)
 470   {
 471     recv_size = Read(my_data, MAX_BUFSIZE).LastCount();
 472   }
 473
 474   RestoreState();
 475   delete [] my_data;
 476
 477 #undef MAX_BUFSIZE
 478 }
 479
 480 // --------------------------------------------------------------
 481 // wxSocketBase socket info functions
 482 // --------------------------------------------------------------
 483
 484 bool wxSocketBase::GetPeer(wxSockAddress& addr_man) const
 485 {
 486   GAddress *peer;
 487
 488   if (!m_socket)
 489     return FALSE;
 490
 491   peer = GSocket_GetPeer(m_socket);
 492   addr_man.SetAddress(peer);
 493   GAddress_destroy(peer);
 494
 495   return TRUE;
 496 }
 497
 498 bool wxSocketBase::GetLocal(wxSockAddress& addr_man) const
 499 {
 500   GAddress *local;
 501
 502   if (!m_socket)
 503     return FALSE;
 504
 505   local = GSocket_GetLocal(m_socket);
 506   addr_man.SetAddress(local);
 507   GAddress_destroy(local);
 508
 509   return TRUE;
 510 }
 511
 512 // --------------------------------------------------------------
 513 // wxSocketBase wait functions
 514 // --------------------------------------------------------------
 515
 516 void wxSocketBase::SaveState()
 517 {
 518   wxSocketState *state;
 519
 520   state = new wxSocketState();
 521
 522   state->notify_state     = m_notify_state;
 523   state->evt_notify_state = m_neededreq;
 524   state->socket_flags     = m_flags;
 525   state->c_callback       = m_cbk;
 526   state->c_callback_data  = m_cdata;
 527
 528   m_states.Append(state);
 529 }
 530
 531 void wxSocketBase::RestoreState()
 532 {
 533   wxNode *node;
 534   wxSocketState *state;
 535
 536   node = m_states.Last();
 537   if (!node)
 538     return;
 539
 540   state = (wxSocketState *)node->Data();
 541
 542   SetFlags(state->socket_flags);
 543   m_neededreq = state->evt_notify_state;
 544   m_cbk       = state->c_callback;
 545   m_cdata     = state->c_callback_data;
 546   Notify(state->notify_state);
 547
 548   delete node;
 549   delete state;
 550 }
 551
 552 // --------------------------------------------------------------
 553 // --------- wxSocketBase callback functions --------------------
 554 // --------------------------------------------------------------
 555
 556 wxSocketBase::wxSockCbk wxSocketBase::Callback(wxSockCbk cbk_)
 557 {
 558   wxSockCbk old_cbk = cbk_;
 559
 560   m_cbk = cbk_;
 561   return old_cbk;
 562 }
 563
 564 char *wxSocketBase::CallbackData(char *data)
 565 {
 566   char *old_data = m_cdata;
 567
 568   m_cdata = data;
 569   return old_data;
 570 }
 571
 572 // --------------------------------------------------------------
 573 // --------- wxSocketBase wait functions ------------------------
 574 // --------------------------------------------------------------
 575
 576 static void wx_socket_wait(GSocket *socket, GSocketEvent event, char *cdata)
 577 {
 578   int *state = (int *)cdata;
 579
 580   *state = event;
 581 }
 582
 583 bool wxSocketBase::_Wait(long seconds, long milliseconds, int type)
 584 {
 585   bool old_notify_state = m_notify_state;
 586   int state = -1;
 587   _wxSocketInternalTimer timer;
 588
 589   if (!m_connected || !m_socket)
 590     return FALSE;
 591
 592   // Set the variable to change
 593   timer.m_state = &state;
 594   timer.m_new_val = GSOCK_MAX_EVENT;
 595
 596   // Disable the previous handler
 597   Notify(FALSE);
 598
 599   // Set the timeout
 600   timer.Start(seconds * 1000 + milliseconds, TRUE);
 601   GSocket_SetCallback(m_socket, type, wx_socket_wait, (char *)&state);
 602
 603   while (state == -1)
 604     wxYield();
 605
 606   GSocket_UnsetCallback(m_socket, type);
 607   timer.Stop();
 608
 609   // Notify will restore automatically the old GSocket flags
 610   Notify(old_notify_state);
 611
 612   return (state != GSOCK_MAX_EVENT);
 613 }
 614
 615 bool wxSocketBase::Wait(long seconds, long milliseconds)
 616 {
 617   return _Wait(seconds, milliseconds, GSOCK_INPUT_FLAG | GSOCK_OUTPUT_FLAG |
 618                                       GSOCK_CONNECTION_FLAG | GSOCK_LOST_FLAG);
 619 }
 620
 621 bool wxSocketBase::WaitForRead(long seconds, long milliseconds)
 622 {
 623   return _Wait(seconds, milliseconds, GSOCK_INPUT_FLAG | GSOCK_LOST_FLAG);
 624 }
 625
 626 bool wxSocketBase::WaitForWrite(long seconds, long milliseconds)
 627 {
 628   return _Wait(seconds, milliseconds, GSOCK_OUTPUT_FLAG | GSOCK_LOST_FLAG);
 629 }
 630
 631 bool wxSocketBase::WaitForLost(long seconds, long milliseconds)
 632 {
 633   return _Wait(seconds, milliseconds, GSOCK_LOST_FLAG);
 634 }
 635
 636 // --------------------------------------------------------------
 637 // --------- wxSocketBase callback management -------------------
 638 // --------------------------------------------------------------
 639
 640 GSocketEventFlags wxSocketBase::EventToNotify(GSocketEvent evt)
 641 {
 642   switch (evt)
 643   {
 644   case GSOCK_INPUT:
 645     return GSOCK_INPUT_FLAG;
 646   case GSOCK_OUTPUT:
 647     return GSOCK_OUTPUT_FLAG;
 648   case GSOCK_CONNECTION:
 649     return GSOCK_CONNECTION_FLAG;
 650   case GSOCK_LOST:
 651     return GSOCK_LOST_FLAG;
 652   default:
 653     return 0;
 654   }
 655   return 0;
 656 }
 657
 658 void wxSocketBase::SetFlags(wxSockFlags _flags)
 659 {
 660   m_flags = _flags;
 661 }
 662
 663 wxSocketBase::wxSockFlags wxSocketBase::GetFlags() const
 664 {
 665   return m_flags;
 666 }
 667
 668 void wxSocketBase::SetNotify(GSocketEventFlags flags)
 669 {
 670   /* Check if server */
 671   if (m_type != SOCK_SERVER)
 672     flags &= ~GSOCK_CONNECTION_FLAG;
 673
 674   m_neededreq = flags;
 675   if (m_neededreq == 0)
 676     Notify(FALSE);
 677   else
 678     Notify(m_notify_state);
 679 }
 680
 681 // --------------------------------------------------------------
 682 // Automatic notifier
 683 // --------------------------------------------------------------
 684
 685 static void wx_socket_fallback(GSocket *socket, GSocketEvent event, char *cdata)
 686 {
 687   wxSocketBase *sckobj = (wxSocketBase *)cdata;
 688
 689   sckobj->OnRequest(event);
 690 }
 691
 692 void wxSocketBase::Notify(bool notify)
 693 {
 694   m_notify_state = notify;
 695   if (!m_socket)
 696     return;
 697
 698   GSocket_UnsetCallback(m_socket, GSOCK_INPUT_FLAG | GSOCK_OUTPUT_FLAG |
 699                                   GSOCK_LOST_FLAG | GSOCK_CONNECTION_FLAG);
 700   if (!notify)
 701     return;
 702
 703   GSocket_SetCallback(m_socket, m_neededreq, wx_socket_fallback, (char *)this);
 704 }
 705
 706 void wxSocketBase::OnRequest(GSocketEvent req_evt)
 707 {
 708   wxSocketEvent event(m_id);
 709   GSocketEventFlags notify = EventToNotify(req_evt);
 710
 711   if (m_defering != NO_DEFER) {
 712     DoDefer(req_evt);
 713     return;
 714   }
 715
 716   if ((m_neededreq & notify) == notify) {
 717     event.m_socket = this;
 718     event.m_skevt = req_evt;
 719     ProcessEvent(event);
 720     OldOnNotify(req_evt);
 721   }
 722
 723   if (req_evt == GSOCK_LOST)
 724     Close();
 725 }
 726
 727 void wxSocketBase::OldOnNotify(GSocketEvent evt)
 728 {
 729 }
 730
 731 // --------------------------------------------------------------
 732 // --------- wxSocketBase functions [Callback, CallbackData] ----
 733 // --------------------------------------------------------------
 734
 735 void wxSocketBase::SetEventHandler(wxEvtHandler& h_evt, int id)
 736 {
 737   SetNextHandler(&h_evt);
 738   m_id = id;
 739 }
 740
 741 // --------------------------------------------------------------
 742 // --------- wxSocketBase pushback library ----------------------
 743 // --------------------------------------------------------------
 744
 745 void wxSocketBase::CreatePushbackAfter(const char *buffer, size_t size)
 746 {
 747   char *curr_pos;
 748
 749   if (m_unread != NULL)
 750     m_unread = (char *) realloc(m_unread, m_unrd_size+size);
 751   else
 752     m_unread = (char *) malloc(size);
 753
 754   curr_pos = m_unread + m_unrd_size;
 755
 756   memcpy(curr_pos, buffer, size);
 757   m_unrd_size += size;
 758 }
 759
 760 void wxSocketBase::CreatePushbackBefore(const char *buffer, size_t size)
 761 {
 762   if (m_unread == NULL)
 763     m_unread = (char *)malloc(size);
 764   else {
 765     char *tmp;
 766
 767     tmp = (char *)malloc(m_unrd_size + size);
 768     memcpy(tmp+size, m_unread, m_unrd_size);
 769     free(m_unread);
 770
 771     m_unread = tmp;
 772   }
 773
 774   m_unrd_size += size;
 775
 776   memcpy(m_unread, buffer, size);
 777 }
 778
 779 size_t wxSocketBase::GetPushback(char *buffer, size_t size, bool peek)
 780 {
 781   if (!m_unrd_size)
 782     return 0;
 783
 784   if (size > (m_unrd_size-m_unrd_cur))
 785     size = m_unrd_size-m_unrd_cur;
 786   memcpy(buffer, (m_unread+m_unrd_cur), size);
 787
 788   if (!peek) {
 789     m_unrd_cur += size;
 790     if (m_unrd_size == m_unrd_cur) {
 791       free(m_unread);
 792       m_unread = NULL;
 793       m_unrd_size = 0;
 794       m_unrd_cur  = 0;
 795     }
 796   }
 797
 798   return size;
 799 }
 800
 801 // --------------------------------------------------------------
 802 // wxSocketServer
 803 // --------------------------------------------------------------
 804
 805 wxSocketServer::wxSocketServer(wxSockAddress& addr_man,
 806              wxSockFlags flags) :
 807   wxSocketBase(flags, SOCK_SERVER)
 808 {
 809   m_socket = GSocket_new();
 810
 811   if (!m_socket)
 812     return;
 813
 814   GSocket_SetLocal(m_socket, addr_man.GetAddress());
 815   if (GSocket_SetServer(m_socket) != GSOCK_NOERROR) {
 816     GSocket_destroy(m_socket);
 817     m_socket = NULL;
 818     return;
 819   }
 820
 821   Notify(TRUE);
 822 }
 823
 824 // --------------------------------------------------------------
 825 // wxSocketServer Accept
 826 // --------------------------------------------------------------
 827
 828 bool wxSocketServer::AcceptWith(wxSocketBase& sock)
 829 {
 830   GSocket *child_socket;
 831
 832   child_socket = GSocket_WaitConnection(m_socket);
 833
 834   sock.m_type = SOCK_INTERNAL;
 835   sock.m_socket = child_socket;
 836   sock.m_connected = TRUE;
 837
 838   return TRUE;
 839 }
 840
 841 wxSocketBase *wxSocketServer::Accept()
 842 {
 843   wxSocketBase* sock = new wxSocketBase();
 844
 845   sock->SetFlags((wxSockFlags)m_flags);
 846
 847   if (!AcceptWith(*sock))
 848     return NULL;
 849
 850   return sock;
 851 }
 852
 853 // --------------------------------------------------------------
 854 // wxSocketClient
 855 // --------------------------------------------------------------
 856
 857 // --------- wxSocketClient CONSTRUCTOR -------------------------
 858 // --------------------------------------------------------------
 859 wxSocketClient::wxSocketClient(wxSockFlags _flags) :
 860   wxSocketBase(_flags, SOCK_CLIENT)
 861 {
 862 }
 863
 864 // --------------------------------------------------------------
 865 // --------- wxSocketClient DESTRUCTOR --------------------------
 866 // --------------------------------------------------------------
 867 wxSocketClient::~wxSocketClient()
 868 {
 869 }
 870
 871 // --------------------------------------------------------------
 872 // --------- wxSocketClient Connect functions -------------------
 873 // --------------------------------------------------------------
 874 bool wxSocketClient::Connect(wxSockAddress& addr_man, bool WXUNUSED(wait) )
 875 {
 876   if (IsConnected())
 877     Close();
 878
 879   // This should never happen.
 880   if (m_socket)
 881     GSocket_destroy(m_socket);
 882
 883   // Initializes all socket stuff ...
 884   // --------------------------------
 885   m_socket = GSocket_new();
 886
 887   if (!m_socket)
 888     return FALSE;
 889
 890   m_connected = FALSE;
 891
 892   // Update the flags of m_socket.
 893   SetFlags(m_flags);
 894   GSocket_SetPeer(m_socket, addr_man.GetAddress());
 895   if (GSocket_Connect(m_socket, GSOCK_STREAMED) != GSOCK_NOERROR)
 896     return FALSE;
 897
 898   // Enables bg events.
 899   // ------------------
 900   Notify(TRUE);
 901
 902   m_connected = TRUE;
 903   return TRUE;
 904 }
 905
 906 bool wxSocketClient::WaitOnConnect(long seconds, long microseconds)
 907 {
 908   int ret = _Wait(seconds, microseconds, GSOCK_CONNECTION_FLAG | GSOCK_LOST_FLAG);
 909
 910   if (ret)
 911     m_connected = TRUE;
 912
 913   return m_connected;
 914 }
 915
 916 void wxSocketClient::OnRequest(GSocketEvent evt)
 917 {
 918   if (evt == GSOCK_CONNECTION)
 919   {
 920     if (m_connected)
 921     {
 922       m_neededreq &= ~GSOCK_CONNECTION_FLAG;
 923       return;
 924     }
 925     m_connected = TRUE;
 926     return;
 927   }
 928   wxSocketBase::OnRequest(evt);
 929 }
 930
 931 // --------------------------------------------------------------
 932 // wxSocketEvent
 933 // --------------------------------------------------------------
 934
 935 wxSocketEvent::wxSocketEvent(int id)
 936   : wxEvent(id)
 937 {
 938   wxEventType type = (wxEventType)wxEVT_SOCKET;
 939
 940   SetEventType(type);
 941 }
 942
 943 void wxSocketEvent::CopyObject(wxObject& obj_d) const
 944 {
 945   wxSocketEvent *event = (wxSocketEvent *)&obj_d;
 946
 947   wxEvent::CopyObject(obj_d);
 948
 949   event->m_skevt = m_skevt;
 950   event->m_socket = m_socket;
 951 }
 952
 953 // --------------------------------------------------------------------------
 954 // wxSocketModule
 955 // --------------------------------------------------------------------------
 956 class WXDLLEXPORT wxSocketModule: public wxModule {
 957   DECLARE_DYNAMIC_CLASS(wxSocketModule)
 958  public:
 959   bool OnInit() {
 960     return GSocket_Init();
 961   }
 962   void OnExit() {
 963     GSocket_Cleanup();
 964   }
 965 };
 966
 967 IMPLEMENT_DYNAMIC_CLASS(wxSocketModule, wxModule)
 968
 969 #endif
 970   // wxUSE_SOCKETS