src/msw/gsocket.cpp

   1 /* -------------------------------------------------------------------------
   2  * Project:     GSocket (Generic Socket)
   3  * Name:        gsocket.cpp
   4  * Copyright:   (c) Guilhem Lavaux
   5  * Licence:     wxWindows Licence
   6  * Author:      Guillermo Rodriguez Garcia <guille@iies.es>
   7  * Purpose:     GSocket main MSW file
   8  * Licence:     The wxWindows licence
   9  * CVSID:       $Id$
  10  * -------------------------------------------------------------------------
  11  */
  12
  13 // For compilers that support precompilation, includes "wx.h".
  14 #include "wx/wxprec.h"
  15
  16 #ifdef __BORLANDC__
  17     #pragma hdrstop
  18 #endif
  19
  20 #ifdef _MSC_VER
  21    /* RPCNOTIFICATION_ROUTINE in rasasync.h (included from winsock.h),
  22     * warning: conditional expression is constant.
  23     */
  24 #  pragma warning(disable:4115)
  25    /* FD_SET,
  26     * warning: named type definition in parentheses.
  27     */
  28 #  pragma warning(disable:4127)
  29    /* GAddress_UNIX_GetPath,
  30     * warning: unreferenced formal parameter.
  31     */
  32 #  pragma warning(disable:4100)
  33
  34 #ifdef __WXWINCE__
  35     /* windows.h results in tons of warnings at max warning level */
  36 #   ifdef _MSC_VER
  37 #       pragma warning(push, 1)
  38 #   endif
  39 #   include <windows.h>
  40 #   ifdef _MSC_VER
  41 #       pragma warning(pop)
  42 #       pragma warning(disable:4514)
  43 #   endif
  44 #endif
  45
  46 #endif /* _MSC_VER */
  47
  48 #if defined(__CYGWIN__)
  49     //CYGWIN gives annoying warning about runtime stuff if we don't do this
  50 #   define USE_SYS_TYPES_FD_SET
  51 #   include <sys/types.h>
  52 #endif
  53
  54 #include <winsock.h>
  55
  56 #ifndef __GSOCKET_STANDALONE__
  57 #   include "wx/platform.h"
  58 #   include "wx/setup.h"
  59 #endif
  60
  61 #if wxUSE_SOCKETS || defined(__GSOCKET_STANDALONE__)
  62
  63 #ifndef __GSOCKET_STANDALONE__
  64 #  include "wx/msw/gsockmsw.h"
  65 #  include "wx/gsocket.h"
  66 #else
  67 #  include "gsockmsw.h"
  68 #  include "gsocket.h"
  69 #endif /* __GSOCKET_STANDALONE__ */
  70
  71 #ifndef __WXWINCE__
  72 #include <assert.h>
  73 #else
  74 #define assert(x)
  75 #ifndef isdigit
  76 #define isdigit(x) (x > 47 && x < 58)
  77 #endif
  78 #include "wx/msw/wince/net.h"
  79 #endif
  80
  81 #include <string.h>
  82 #include <stdio.h>
  83 #include <stdlib.h>
  84 #include <stddef.h>
  85 #include <ctype.h>
  86
  87 /* if we use configure for MSW SOCKLEN_T will be already defined */
  88 #ifndef SOCKLEN_T
  89 #  define SOCKLEN_T int
  90 #endif
  91
  92 /* Table of GUI-related functions. We must call them indirectly because
  93  * of wxBase and GUI separation: */
  94
  95 static GSocketGUIFunctionsTable *gs_gui_functions;
  96
  97 class GSocketGUIFunctionsTableNull: public GSocketGUIFunctionsTable
  98 {
  99 public:
 100     virtual bool OnInit();
 101     virtual void OnExit();
 102     virtual bool CanUseEventLoop();
 103     virtual bool Init_Socket(GSocket *socket);
 104     virtual void Destroy_Socket(GSocket *socket);
 105     virtual void Enable_Events(GSocket *socket);
 106     virtual void Disable_Events(GSocket *socket);
 107 };
 108
 109 bool GSocketGUIFunctionsTableNull::OnInit()
 110 {   return true; }
 111 void GSocketGUIFunctionsTableNull::OnExit()
 112 {}
 113 bool GSocketGUIFunctionsTableNull::CanUseEventLoop()
 114 {   return false; }
 115 bool GSocketGUIFunctionsTableNull::Init_Socket(GSocket *WXUNUSED(socket))
 116 {   return true; }
 117 void GSocketGUIFunctionsTableNull::Destroy_Socket(GSocket *WXUNUSED(socket))
 118 {}
 119 void GSocketGUIFunctionsTableNull::Enable_Events(GSocket *WXUNUSED(socket))
 120 {}
 121 void GSocketGUIFunctionsTableNull::Disable_Events(GSocket *WXUNUSED(socket))
 122 {}
 123 /* Global initialisers */
 124
 125 void GSocket_SetGUIFunctions(GSocketGUIFunctionsTable *guifunc)
 126 {
 127   gs_gui_functions = guifunc;
 128 }
 129
 130 int GSocket_Init(void)
 131 {
 132   WSADATA wsaData;
 133
 134   if (!gs_gui_functions)
 135   {
 136     static GSocketGUIFunctionsTableNull table;
 137     gs_gui_functions = &table;
 138   }
 139   if ( !gs_gui_functions->OnInit() )
 140   {
 141     return 0;
 142   }
 143
 144   /* Initialize WinSocket */
 145   return (WSAStartup((1 << 8) | 1, &wsaData) == 0);
 146 }
 147
 148 void GSocket_Cleanup(void)
 149 {
 150   if (gs_gui_functions)
 151   {
 152       gs_gui_functions->OnExit();
 153   }
 154
 155   /* Cleanup WinSocket */
 156   WSACleanup();
 157 }
 158
 159 /* Constructors / Destructors for GSocket */
 160
 161 GSocket::GSocket()
 162 {
 163   int i;
 164
 165   m_fd              = INVALID_SOCKET;
 166   for (i = 0; i < GSOCK_MAX_EVENT; i++)
 167   {
 168     m_cbacks[i]     = NULL;
 169   }
 170   m_detected        = 0;
 171   m_local           = NULL;
 172   m_peer            = NULL;
 173   m_error           = GSOCK_NOERROR;
 174   m_server          = false;
 175   m_stream          = true;
 176   m_non_blocking    = false;
 177   m_timeout.tv_sec  = 10 * 60;  /* 10 minutes */
 178   m_timeout.tv_usec = 0;
 179   m_establishing    = false;
 180   m_reusable        = false;
 181
 182   assert(gs_gui_functions);
 183   /* Per-socket GUI-specific initialization */
 184   m_ok = gs_gui_functions->Init_Socket(this);
 185 }
 186
 187 void GSocket::Close()
 188 {
 189     gs_gui_functions->Disable_Events(this);
 190     closesocket(m_fd);
 191     m_fd = INVALID_SOCKET;
 192 }
 193
 194 GSocket::~GSocket()
 195 {
 196   assert(this);
 197
 198   /* Per-socket GUI-specific cleanup */
 199   gs_gui_functions->Destroy_Socket(this);
 200
 201   /* Check that the socket is really shutdowned */
 202   if (m_fd != INVALID_SOCKET)
 203     Shutdown();
 204
 205   /* Destroy private addresses */
 206   if (m_local)
 207     GAddress_destroy(m_local);
 208
 209   if (m_peer)
 210     GAddress_destroy(m_peer);
 211 }
 212
 213 /* GSocket_Shutdown:
 214  *  Disallow further read/write operations on this socket, close
 215  *  the fd and disable all callbacks.
 216  */
 217 void GSocket::Shutdown()
 218 {
 219   int evt;
 220
 221   assert(this);
 222
 223   /* If socket has been created, shutdown it */
 224   if (m_fd != INVALID_SOCKET)
 225   {
 226     shutdown(m_fd, 2);
 227     Close();
 228   }
 229
 230   /* Disable GUI callbacks */
 231   for (evt = 0; evt < GSOCK_MAX_EVENT; evt++)
 232     m_cbacks[evt] = NULL;
 233
 234   m_detected = GSOCK_LOST_FLAG;
 235 }
 236
 237 /* Address handling */
 238
 239 /* GSocket_SetLocal:
 240  * GSocket_GetLocal:
 241  * GSocket_SetPeer:
 242  * GSocket_GetPeer:
 243  *  Set or get the local or peer address for this socket. The 'set'
 244  *  functions return GSOCK_NOERROR on success, an error code otherwise.
 245  *  The 'get' functions return a pointer to a GAddress object on success,
 246  *  or NULL otherwise, in which case they set the error code of the
 247  *  corresponding GSocket.
 248  *
 249  *  Error codes:
 250  *    GSOCK_INVSOCK - the socket is not valid.
 251  *    GSOCK_INVADDR - the address is not valid.
 252  */
 253 GSocketError GSocket::SetLocal(GAddress *address)
 254 {
 255   assert(this);
 256
 257   /* the socket must be initialized, or it must be a server */
 258   if (m_fd != INVALID_SOCKET && !m_server)
 259   {
 260     m_error = GSOCK_INVSOCK;
 261     return GSOCK_INVSOCK;
 262   }
 263
 264   /* check address */
 265   if (address == NULL || address->m_family == GSOCK_NOFAMILY)
 266   {
 267     m_error = GSOCK_INVADDR;
 268     return GSOCK_INVADDR;
 269   }
 270
 271   if (m_local)
 272     GAddress_destroy(m_local);
 273
 274   m_local = GAddress_copy(address);
 275
 276   return GSOCK_NOERROR;
 277 }
 278
 279 GSocketError GSocket::SetPeer(GAddress *address)
 280 {
 281   assert(this);
 282
 283   /* check address */
 284   if (address == NULL || address->m_family == GSOCK_NOFAMILY)
 285   {
 286     m_error = GSOCK_INVADDR;
 287     return GSOCK_INVADDR;
 288   }
 289
 290   if (m_peer)
 291     GAddress_destroy(m_peer);
 292
 293   m_peer = GAddress_copy(address);
 294
 295   return GSOCK_NOERROR;
 296 }
 297
 298 GAddress *GSocket::GetLocal()
 299 {
 300   GAddress *address;
 301   struct sockaddr addr;
 302   SOCKLEN_T size = sizeof(addr);
 303   GSocketError err;
 304
 305   assert(this);
 306
 307   /* try to get it from the m_local var first */
 308   if (m_local)
 309     return GAddress_copy(m_local);
 310
 311   /* else, if the socket is initialized, try getsockname */
 312   if (m_fd == INVALID_SOCKET)
 313   {
 314     m_error = GSOCK_INVSOCK;
 315     return NULL;
 316   }
 317
 318   if (getsockname(m_fd, &addr, &size) == SOCKET_ERROR)
 319   {
 320     m_error = GSOCK_IOERR;
 321     return NULL;
 322   }
 323
 324   /* got a valid address from getsockname, create a GAddress object */
 325   if ((address = GAddress_new()) == NULL)
 326   {
 327      m_error = GSOCK_MEMERR;
 328      return NULL;
 329   }
 330
 331   if ((err = _GAddress_translate_from(address, &addr, size)) != GSOCK_NOERROR)
 332   {
 333      GAddress_destroy(address);
 334      m_error = err;
 335      return NULL;
 336   }
 337
 338   return address;
 339 }
 340
 341 GAddress *GSocket::GetPeer()
 342 {
 343   assert(this);
 344
 345   /* try to get it from the m_peer var */
 346   if (m_peer)
 347     return GAddress_copy(m_peer);
 348
 349   return NULL;
 350 }
 351
 352 /* Server specific parts */
 353
 354 /* GSocket_SetServer:
 355  *  Sets up this socket as a server. The local address must have been
 356  *  set with GSocket_SetLocal() before GSocket_SetServer() is called.
 357  *  Returns GSOCK_NOERROR on success, one of the following otherwise:
 358  *
 359  *  Error codes:
 360  *    GSOCK_INVSOCK - the socket is in use.
 361  *    GSOCK_INVADDR - the local address has not been set.
 362  *    GSOCK_IOERR   - low-level error.
 363  */
 364 GSocketError GSocket::SetServer()
 365 {
 366   u_long arg = 1;
 367
 368   assert(this);
 369
 370   /* must not be in use */
 371   if (m_fd != INVALID_SOCKET)
 372   {
 373     m_error = GSOCK_INVSOCK;
 374     return GSOCK_INVSOCK;
 375   }
 376
 377   /* the local addr must have been set */
 378   if (!m_local)
 379   {
 380     m_error = GSOCK_INVADDR;
 381     return GSOCK_INVADDR;
 382   }
 383
 384   /* Initialize all fields */
 385   m_server   = true;
 386   m_stream   = true;
 387
 388   /* Create the socket */
 389   m_fd = socket(m_local->m_realfamily, SOCK_STREAM, 0);
 390
 391   if (m_fd == INVALID_SOCKET)
 392   {
 393     m_error = GSOCK_IOERR;
 394     return GSOCK_IOERR;
 395   }
 396
 397   ioctlsocket(m_fd, FIONBIO, (u_long FAR *) &arg);
 398   gs_gui_functions->Enable_Events(this);
 399
 400   /* allow a socket to re-bind if the socket is in the TIME_WAIT
 401      state after being previously closed.
 402    */
 403   if (m_reusable) {
 404     setsockopt(m_fd, SOL_SOCKET, SO_REUSEADDR, (const char*)&arg, sizeof(u_long));
 405   }
 406
 407   /* Bind to the local address,
 408    * retrieve the actual address bound,
 409    * and listen up to 5 connections.
 410    */
 411   if ((bind(m_fd, m_local->m_addr, m_local->m_len) != 0) ||
 412       (getsockname(m_fd,
 413                    m_local->m_addr,
 414                    (SOCKLEN_T *)&m_local->m_len) != 0) ||
 415       (listen(m_fd, 5) != 0))
 416   {
 417     Close();
 418     m_error = GSOCK_IOERR;
 419     return GSOCK_IOERR;
 420   }
 421
 422   return GSOCK_NOERROR;
 423 }
 424
 425 /* GSocket_WaitConnection:
 426  *  Waits for an incoming client connection. Returns a pointer to
 427  *  a GSocket object, or NULL if there was an error, in which case
 428  *  the last error field will be updated for the calling GSocket.
 429  *
 430  *  Error codes (set in the calling GSocket)
 431  *    GSOCK_INVSOCK    - the socket is not valid or not a server.
 432  *    GSOCK_TIMEDOUT   - timeout, no incoming connections.
 433  *    GSOCK_WOULDBLOCK - the call would block and the socket is nonblocking.
 434  *    GSOCK_MEMERR     - couldn't allocate memory.
 435  *    GSOCK_IOERR      - low-level error.
 436  */
 437 GSocket *GSocket::WaitConnection()
 438 {
 439   GSocket *connection;
 440   struct sockaddr from;
 441   SOCKLEN_T fromlen = sizeof(from);
 442   GSocketError err;
 443   u_long arg = 1;
 444
 445   assert(this);
 446
 447   /* Reenable CONNECTION events */
 448   m_detected &= ~GSOCK_CONNECTION_FLAG;
 449
 450   /* If the socket has already been created, we exit immediately */
 451   if (m_fd == INVALID_SOCKET || !m_server)
 452   {
 453     m_error = GSOCK_INVSOCK;
 454     return NULL;
 455   }
 456
 457   /* Create a GSocket object for the new connection */
 458   connection = GSocket_new();
 459
 460   if (!connection)
 461   {
 462     m_error = GSOCK_MEMERR;
 463     return NULL;
 464   }
 465
 466   /* Wait for a connection (with timeout) */
 467   if (Input_Timeout() == GSOCK_TIMEDOUT)
 468   {
 469     delete connection;
 470     /* m_error set by _GSocket_Input_Timeout */
 471     return NULL;
 472   }
 473
 474   connection->m_fd = accept(m_fd, &from, &fromlen);
 475
 476   if (connection->m_fd == INVALID_SOCKET)
 477   {
 478     if (WSAGetLastError() == WSAEWOULDBLOCK)
 479       m_error = GSOCK_WOULDBLOCK;
 480     else
 481       m_error = GSOCK_IOERR;
 482
 483     delete connection;
 484     return NULL;
 485   }
 486
 487   /* Initialize all fields */
 488   connection->m_server   = false;
 489   connection->m_stream   = true;
 490
 491   /* Setup the peer address field */
 492   connection->m_peer = GAddress_new();
 493   if (!connection->m_peer)
 494   {
 495     delete connection;
 496     m_error = GSOCK_MEMERR;
 497     return NULL;
 498   }
 499   err = _GAddress_translate_from(connection->m_peer, &from, fromlen);
 500   if (err != GSOCK_NOERROR)
 501   {
 502     GAddress_destroy(connection->m_peer);
 503     delete connection;
 504     m_error = err;
 505     return NULL;
 506   }
 507
 508   ioctlsocket(connection->m_fd, FIONBIO, (u_long FAR *) &arg);
 509   gs_gui_functions->Enable_Events(connection);
 510
 511   return connection;
 512 }
 513
 514 /* GSocket_SetReusable:
 515 *  Simply sets the m_resuable flag on the socket. GSocket_SetServer will
 516 *  make the appropriate setsockopt() call.
 517 *  Implemented as a GSocket function because clients (ie, wxSocketServer)
 518 *  don't have access to the GSocket struct information.
 519 *  Returns true if the flag was set correctly, false if an error occurred
 520 *  (ie, if the parameter was NULL)
 521 */
 522 bool GSocket::SetReusable()
 523 {
 524     /* socket must not be null, and must not be in use/already bound */
 525     if (this && m_fd == INVALID_SOCKET) {
 526         m_reusable = true;
 527         return true;
 528     }
 529     return false;
 530 }
 531
 532 /* Client specific parts */
 533
 534 /* GSocket_Connect:
 535  *  For stream (connection oriented) sockets, GSocket_Connect() tries
 536  *  to establish a client connection to a server using the peer address
 537  *  as established with GSocket_SetPeer(). Returns GSOCK_NOERROR if the
 538  *  connection has been successfully established, or one of the error
 539  *  codes listed below. Note that for nonblocking sockets, a return
 540  *  value of GSOCK_WOULDBLOCK doesn't mean a failure. The connection
 541  *  request can be completed later; you should use GSocket_Select()
 542  *  to poll for GSOCK_CONNECTION | GSOCK_LOST, or wait for the
 543  *  corresponding asynchronous events.
 544  *
 545  *  For datagram (non connection oriented) sockets, GSocket_Connect()
 546  *  just sets the peer address established with GSocket_SetPeer() as
 547  *  default destination.
 548  *
 549  *  Error codes:
 550  *    GSOCK_INVSOCK    - the socket is in use or not valid.
 551  *    GSOCK_INVADDR    - the peer address has not been established.
 552  *    GSOCK_TIMEDOUT   - timeout, the connection failed.
 553  *    GSOCK_WOULDBLOCK - connection in progress (nonblocking sockets only)
 554  *    GSOCK_MEMERR     - couldn't allocate memory.
 555  *    GSOCK_IOERR      - low-level error.
 556  */
 557 GSocketError GSocket::Connect(GSocketStream stream)
 558 {
 559   int ret, err;
 560   u_long arg = 1;
 561
 562   assert(this);
 563
 564   /* Enable CONNECTION events (needed for nonblocking connections) */
 565   m_detected &= ~GSOCK_CONNECTION_FLAG;
 566
 567   if (m_fd != INVALID_SOCKET)
 568   {
 569     m_error = GSOCK_INVSOCK;
 570     return GSOCK_INVSOCK;
 571   }
 572
 573   if (!m_peer)
 574   {
 575     m_error = GSOCK_INVADDR;
 576     return GSOCK_INVADDR;
 577   }
 578
 579   /* Streamed or dgram socket? */
 580   m_stream   = (stream == GSOCK_STREAMED);
 581   m_server   = false;
 582   m_establishing = false;
 583
 584   /* Create the socket */
 585   m_fd = socket(m_peer->m_realfamily,
 586                      m_stream? SOCK_STREAM : SOCK_DGRAM, 0);
 587
 588   if (m_fd == INVALID_SOCKET)
 589   {
 590     m_error = GSOCK_IOERR;
 591     return GSOCK_IOERR;
 592   }
 593
 594   ioctlsocket(m_fd, FIONBIO, (u_long FAR *) &arg);
 595   gs_gui_functions->Enable_Events(this);
 596
 597   /* Connect it to the peer address, with a timeout (see below) */
 598   ret = connect(m_fd, m_peer->m_addr, m_peer->m_len);
 599
 600   if (ret == SOCKET_ERROR)
 601   {
 602     err = WSAGetLastError();
 603
 604     /* If connect failed with EWOULDBLOCK and the GSocket object
 605      * is in blocking mode, we select() for the specified timeout
 606      * checking for writability to see if the connection request
 607      * completes.
 608      */
 609     if ((err == WSAEWOULDBLOCK) && (!m_non_blocking))
 610     {
 611       err = Connect_Timeout();
 612
 613       if (err != GSOCK_NOERROR)
 614       {
 615         Close();
 616         /* m_error is set in _GSocket_Connect_Timeout */
 617       }
 618
 619       return (GSocketError) err;
 620     }
 621
 622     /* If connect failed with EWOULDBLOCK and the GSocket object
 623      * is set to nonblocking, we set m_error to GSOCK_WOULDBLOCK
 624      * (and return GSOCK_WOULDBLOCK) but we don't close the socket;
 625      * this way if the connection completes, a GSOCK_CONNECTION
 626      * event will be generated, if enabled.
 627      */
 628     if ((err == WSAEWOULDBLOCK) && (m_non_blocking))
 629     {
 630       m_establishing = true;
 631       m_error = GSOCK_WOULDBLOCK;
 632       return GSOCK_WOULDBLOCK;
 633     }
 634
 635     /* If connect failed with an error other than EWOULDBLOCK,
 636      * then the call to GSocket_Connect() has failed.
 637      */
 638     Close();
 639     m_error = GSOCK_IOERR;
 640     return GSOCK_IOERR;
 641   }
 642
 643   return GSOCK_NOERROR;
 644 }
 645
 646 /* Datagram sockets */
 647
 648 /* GSocket_SetNonOriented:
 649  *  Sets up this socket as a non-connection oriented (datagram) socket.
 650  *  Before using this function, the local address must have been set
 651  *  with GSocket_SetLocal(), or the call will fail. Returns GSOCK_NOERROR
 652  *  on success, or one of the following otherwise.
 653  *
 654  *  Error codes:
 655  *    GSOCK_INVSOCK - the socket is in use.
 656  *    GSOCK_INVADDR - the local address has not been set.
 657  *    GSOCK_IOERR   - low-level error.
 658  */
 659 GSocketError GSocket::SetNonOriented()
 660 {
 661   u_long arg = 1;
 662
 663   assert(this);
 664
 665   if (m_fd != INVALID_SOCKET)
 666   {
 667     m_error = GSOCK_INVSOCK;
 668     return GSOCK_INVSOCK;
 669   }
 670
 671   if (!m_local)
 672   {
 673     m_error = GSOCK_INVADDR;
 674     return GSOCK_INVADDR;
 675   }
 676
 677   /* Initialize all fields */
 678   m_stream   = false;
 679   m_server   = false;
 680
 681   /* Create the socket */
 682   m_fd = socket(m_local->m_realfamily, SOCK_DGRAM, 0);
 683
 684   if (m_fd == INVALID_SOCKET)
 685   {
 686     m_error = GSOCK_IOERR;
 687     return GSOCK_IOERR;
 688   }
 689
 690   ioctlsocket(m_fd, FIONBIO, (u_long FAR *) &arg);
 691   gs_gui_functions->Enable_Events(this);
 692
 693   /* Bind to the local address,
 694    * and retrieve the actual address bound.
 695    */
 696   if ((bind(m_fd, m_local->m_addr, m_local->m_len) != 0) ||
 697       (getsockname(m_fd,
 698                    m_local->m_addr,
 699                    (SOCKLEN_T *)&m_local->m_len) != 0))
 700   {
 701     Close();
 702     m_error = GSOCK_IOERR;
 703     return GSOCK_IOERR;
 704   }
 705
 706   return GSOCK_NOERROR;
 707 }
 708
 709 /* Generic IO */
 710
 711 /* Like recv(), send(), ... */
 712 int GSocket::Read(char *buffer, int size)
 713 {
 714   int ret;
 715
 716   assert(this);
 717
 718   /* Reenable INPUT events */
 719   m_detected &= ~GSOCK_INPUT_FLAG;
 720
 721   if (m_fd == INVALID_SOCKET || m_server)
 722   {
 723     m_error = GSOCK_INVSOCK;
 724     return -1;
 725   }
 726
 727   /* If the socket is blocking, wait for data (with a timeout) */
 728   if (Input_Timeout() == GSOCK_TIMEDOUT)
 729     return -1;
 730
 731   /* Read the data */
 732   if (m_stream)
 733     ret = Recv_Stream(buffer, size);
 734   else
 735     ret = Recv_Dgram(buffer, size);
 736
 737   if (ret == SOCKET_ERROR)
 738   {
 739     if (WSAGetLastError() != WSAEWOULDBLOCK)
 740       m_error = GSOCK_IOERR;
 741     else
 742       m_error = GSOCK_WOULDBLOCK;
 743     return -1;
 744   }
 745
 746   return ret;
 747 }
 748
 749 int GSocket::Write(const char *buffer, int size)
 750 {
 751   int ret;
 752
 753   assert(this);
 754
 755   if (m_fd == INVALID_SOCKET || m_server)
 756   {
 757     m_error = GSOCK_INVSOCK;
 758     return -1;
 759   }
 760
 761   /* If the socket is blocking, wait for writability (with a timeout) */
 762   if (Output_Timeout() == GSOCK_TIMEDOUT)
 763     return -1;
 764
 765   /* Write the data */
 766   if (m_stream)
 767     ret = Send_Stream(buffer, size);
 768   else
 769     ret = Send_Dgram(buffer, size);
 770
 771   if (ret == SOCKET_ERROR)
 772   {
 773     if (WSAGetLastError() != WSAEWOULDBLOCK)
 774       m_error = GSOCK_IOERR;
 775     else
 776       m_error = GSOCK_WOULDBLOCK;
 777
 778     /* Only reenable OUTPUT events after an error (just like WSAAsyncSelect
 779      * does). Once the first OUTPUT event is received, users can assume
 780      * that the socket is writable until a read operation fails. Only then
 781      * will further OUTPUT events be posted.
 782      */
 783     m_detected &= ~GSOCK_OUTPUT_FLAG;
 784     return -1;
 785   }
 786
 787   return ret;
 788 }
 789
 790 /* GSocket_Select:
 791  *  Polls the socket to determine its status. This function will
 792  *  check for the events specified in the 'flags' parameter, and
 793  *  it will return a mask indicating which operations can be
 794  *  performed. This function won't block, regardless of the
 795  *  mode (blocking | nonblocking) of the socket.
 796  */
 797 GSocketEventFlags GSocket::Select(GSocketEventFlags flags)
 798 {
 799   if (!gs_gui_functions->CanUseEventLoop())
 800   {
 801     GSocketEventFlags result = 0;
 802     fd_set readfds;
 803     fd_set writefds;
 804     fd_set exceptfds;
 805
 806     assert(this);
 807
 808     FD_ZERO(&readfds);
 809     FD_ZERO(&writefds);
 810     FD_ZERO(&exceptfds);
 811     FD_SET(m_fd, &readfds);
 812     if (flags & GSOCK_OUTPUT_FLAG || flags & GSOCK_CONNECTION_FLAG)
 813       FD_SET(m_fd, &writefds);
 814     FD_SET(m_fd, &exceptfds);
 815
 816     /* Check 'sticky' CONNECTION flag first */
 817     result |= (GSOCK_CONNECTION_FLAG & m_detected);
 818
 819     /* If we have already detected a LOST event, then don't try
 820      * to do any further processing.
 821      */
 822     if ((m_detected & GSOCK_LOST_FLAG) != 0)
 823     {
 824       m_establishing = false;
 825
 826       return (GSOCK_LOST_FLAG & flags);
 827     }
 828
 829     /* Try select now */
 830     if (select(m_fd + 1, &readfds, &writefds, &exceptfds,
 831         &m_timeout) <= 0)
 832     {
 833       /* What to do here? */
 834       return (result & flags);
 835     }
 836
 837     /* Check for readability */
 838     if (FD_ISSET(m_fd, &readfds))
 839     {
 840       char c;
 841
 842       if (!m_stream || recv(m_fd, &c, 1, MSG_PEEK) > 0)
 843       {
 844         result |= GSOCK_INPUT_FLAG;
 845       }
 846       else
 847       {
 848         if (m_server && m_stream)
 849         {
 850           result |= GSOCK_CONNECTION_FLAG;
 851           m_detected |= GSOCK_CONNECTION_FLAG;
 852         }
 853         else
 854         {
 855           m_detected = GSOCK_LOST_FLAG;
 856           m_establishing = false;
 857
 858           /* LOST event: Abort any further processing */
 859           return (GSOCK_LOST_FLAG & flags);
 860         }
 861       }
 862     }
 863
 864     /* Check for writability */
 865     if (FD_ISSET(m_fd, &writefds))
 866     {
 867       if (m_establishing && !m_server)
 868       {
 869         int error;
 870         SOCKLEN_T len = sizeof(error);
 871
 872         m_establishing = false;
 873
 874         getsockopt(m_fd, SOL_SOCKET, SO_ERROR, (char*)&error, &len);
 875
 876         if (error)
 877         {
 878           m_detected = GSOCK_LOST_FLAG;
 879
 880           /* LOST event: Abort any further processing */
 881           return (GSOCK_LOST_FLAG & flags);
 882         }
 883         else
 884         {
 885           result |= GSOCK_CONNECTION_FLAG;
 886           m_detected |= GSOCK_CONNECTION_FLAG;
 887         }
 888       }
 889       else
 890       {
 891         result |= GSOCK_OUTPUT_FLAG;
 892       }
 893     }
 894
 895     /* Check for exceptions and errors (is this useful in Unices?) */
 896     if (FD_ISSET(m_fd, &exceptfds))
 897     {
 898       m_establishing = false;
 899       m_detected = GSOCK_LOST_FLAG;
 900
 901       /* LOST event: Abort any further processing */
 902       return (GSOCK_LOST_FLAG & flags);
 903     }
 904
 905     return (result & flags);
 906   }
 907   else /* USE_GUI() */
 908   {
 909     assert(this);
 910     return flags & m_detected;
 911   }
 912 }
 913
 914 /* Attributes */
 915
 916 /* GSocket_SetNonBlocking:
 917  *  Sets the socket to non-blocking mode. All IO calls will return
 918  *  immediately.
 919  */
 920 void GSocket::SetNonBlocking(bool non_block)
 921 {
 922   assert(this);
 923
 924   m_non_blocking = non_block;
 925 }
 926
 927 /* GSocket_SetTimeout:
 928  *  Sets the timeout for blocking calls. Time is expressed in
 929  *  milliseconds.
 930  */
 931 void GSocket::SetTimeout(unsigned long millis)
 932 {
 933   assert(this);
 934
 935   m_timeout.tv_sec  = (millis / 1000);
 936   m_timeout.tv_usec = (millis % 1000) * 1000;
 937 }
 938
 939 /* GSocket_GetError:
 940  *  Returns the last error occurred for this socket. Note that successful
 941  *  operations do not clear this back to GSOCK_NOERROR, so use it only
 942  *  after an error.
 943  */
 944 GSocketError WXDLLIMPEXP_NET GSocket::GetError()
 945 {
 946   assert(this);
 947
 948   return m_error;
 949 }
 950
 951 /* Callbacks */
 952
 953 /* GSOCK_INPUT:
 954  *   There is data to be read in the input buffer. If, after a read
 955  *   operation, there is still data available, the callback function will
 956  *   be called again.
 957  * GSOCK_OUTPUT:
 958  *   The socket is available for writing. That is, the next write call
 959  *   won't block. This event is generated only once, when the connection is
 960  *   first established, and then only if a call failed with GSOCK_WOULDBLOCK,
 961  *   when the output buffer empties again. This means that the app should
 962  *   assume that it can write since the first OUTPUT event, and no more
 963  *   OUTPUT events will be generated unless an error occurs.
 964  * GSOCK_CONNECTION:
 965  *   Connection successfully established, for client sockets, or incoming
 966  *   client connection, for server sockets. Wait for this event (also watch
 967  *   out for GSOCK_LOST) after you issue a nonblocking GSocket_Connect() call.
 968  * GSOCK_LOST:
 969  *   The connection is lost (or a connection request failed); this could
 970  *   be due to a failure, or due to the peer closing it gracefully.
 971  */
 972
 973 /* GSocket_SetCallback:
 974  *  Enables the callbacks specified by 'flags'. Note that 'flags'
 975  *  may be a combination of flags OR'ed toghether, so the same
 976  *  callback function can be made to accept different events.
 977  *  The callback function must have the following prototype:
 978  *
 979  *  void function(GSocket *socket, GSocketEvent event, char *cdata)
 980  */
 981 void GSocket::SetCallback(GSocketEventFlags flags,
 982                          GSocketCallback callback, char *cdata)
 983 {
 984   int count;
 985
 986   assert(this);
 987
 988   for (count = 0; count < GSOCK_MAX_EVENT; count++)
 989   {
 990     if ((flags & (1 << count)) != 0)
 991     {
 992       m_cbacks[count] = callback;
 993       m_data[count] = cdata;
 994     }
 995   }
 996 }
 997
 998 /* GSocket_UnsetCallback:
 999  *  Disables all callbacks specified by 'flags', which may be a
1000  *  combination of flags OR'ed toghether.
1001  */
1002 void GSocket::UnsetCallback(GSocketEventFlags flags)
1003 {
1004   int count;
1005
1006   assert(this);
1007
1008   for (count = 0; count < GSOCK_MAX_EVENT; count++)
1009   {
1010     if ((flags & (1 << count)) != 0)
1011     {
1012       m_cbacks[count] = NULL;
1013       m_data[count] = NULL;
1014     }
1015   }
1016 }
1017
1018 GSocketError GSocket::GetSockOpt(int level, int optname,
1019                                 void *optval, int *optlen)
1020 {
1021     if (getsockopt(m_fd, level, optname, (char*)optval, optlen) == 0)
1022     {
1023         return GSOCK_NOERROR;
1024     }
1025     return GSOCK_OPTERR;
1026 }
1027
1028 GSocketError GSocket::SetSockOpt(int level, int optname,
1029                                 const void *optval, int optlen)
1030 {
1031     if (setsockopt(m_fd, level, optname, (char*)optval, optlen) == 0)
1032     {
1033         return GSOCK_NOERROR;
1034     }
1035     return GSOCK_OPTERR;
1036 }
1037
1038 /* Internals (IO) */
1039
1040 /* _GSocket_Input_Timeout:
1041  *  For blocking sockets, wait until data is available or
1042  *  until timeout ellapses.
1043  */
1044 GSocketError GSocket::Input_Timeout()
1045 {
1046   fd_set readfds;
1047
1048   if (!m_non_blocking)
1049   {
1050     FD_ZERO(&readfds);
1051     FD_SET(m_fd, &readfds);
1052     if (select(0, &readfds, NULL, NULL, &m_timeout) == 0)
1053     {
1054       m_error = GSOCK_TIMEDOUT;
1055       return GSOCK_TIMEDOUT;
1056     }
1057   }
1058   return GSOCK_NOERROR;
1059 }
1060
1061 /* _GSocket_Output_Timeout:
1062  *  For blocking sockets, wait until data can be sent without
1063  *  blocking or until timeout ellapses.
1064  */
1065 GSocketError GSocket::Output_Timeout()
1066 {
1067   fd_set writefds;
1068
1069   if (!m_non_blocking)
1070   {
1071     FD_ZERO(&writefds);
1072     FD_SET(m_fd, &writefds);
1073     if (select(0, NULL, &writefds, NULL, &m_timeout) == 0)
1074     {
1075       m_error = GSOCK_TIMEDOUT;
1076       return GSOCK_TIMEDOUT;
1077     }
1078   }
1079   return GSOCK_NOERROR;
1080 }
1081
1082 /* _GSocket_Connect_Timeout:
1083  *  For blocking sockets, wait until the connection is
1084  *  established or fails, or until timeout ellapses.
1085  */
1086 GSocketError GSocket::Connect_Timeout()
1087 {
1088   fd_set writefds;
1089   fd_set exceptfds;
1090
1091   FD_ZERO(&writefds);
1092   FD_ZERO(&exceptfds);
1093   FD_SET(m_fd, &writefds);
1094   FD_SET(m_fd, &exceptfds);
1095   if (select(0, NULL, &writefds, &exceptfds, &m_timeout) == 0)
1096   {
1097     m_error = GSOCK_TIMEDOUT;
1098     return GSOCK_TIMEDOUT;
1099   }
1100   if (!FD_ISSET(m_fd, &writefds))
1101   {
1102     m_error = GSOCK_IOERR;
1103     return GSOCK_IOERR;
1104   }
1105
1106   return GSOCK_NOERROR;
1107 }
1108
1109 int GSocket::Recv_Stream(char *buffer, int size)
1110 {
1111   return recv(m_fd, buffer, size, 0);
1112 }
1113
1114 int GSocket::Recv_Dgram(char *buffer, int size)
1115 {
1116   struct sockaddr from;
1117   SOCKLEN_T fromlen = sizeof(from);
1118   int ret;
1119   GSocketError err;
1120
1121   ret = recvfrom(m_fd, buffer, size, 0, &from, &fromlen);
1122
1123   if (ret == SOCKET_ERROR)
1124     return SOCKET_ERROR;
1125
1126   /* Translate a system address into a GSocket address */
1127   if (!m_peer)
1128   {
1129     m_peer = GAddress_new();
1130     if (!m_peer)
1131     {
1132       m_error = GSOCK_MEMERR;
1133       return -1;
1134     }
1135   }
1136   err = _GAddress_translate_from(m_peer, &from, fromlen);
1137   if (err != GSOCK_NOERROR)
1138   {
1139     GAddress_destroy(m_peer);
1140     m_peer  = NULL;
1141     m_error = err;
1142     return -1;
1143   }
1144
1145   return ret;
1146 }
1147
1148 int GSocket::Send_Stream(const char *buffer, int size)
1149 {
1150   return send(m_fd, buffer, size, 0);
1151 }
1152
1153 int GSocket::Send_Dgram(const char *buffer, int size)
1154 {
1155   struct sockaddr *addr;
1156   int len, ret;
1157   GSocketError err;
1158
1159   if (!m_peer)
1160   {
1161     m_error = GSOCK_INVADDR;
1162     return -1;
1163   }
1164
1165   err = _GAddress_translate_to(m_peer, &addr, &len);
1166   if (err != GSOCK_NOERROR)
1167   {
1168     m_error = err;
1169     return -1;
1170   }
1171
1172   ret = sendto(m_fd, buffer, size, 0, addr, len);
1173
1174   /* Frees memory allocated by _GAddress_translate_to */
1175   free(addr);
1176
1177   return ret;
1178 }
1179
1180 /* Compatibility functions for GSocket */
1181 GSocket *GSocket_new(void)
1182 {
1183     GSocket *newsocket = new GSocket();
1184     if(newsocket->IsOk())
1185         return newsocket;
1186     delete newsocket;
1187     return NULL;
1188 }
1189
1190
1191 /*
1192  * -------------------------------------------------------------------------
1193  * GAddress
1194  * -------------------------------------------------------------------------
1195  */
1196
1197 /* CHECK_ADDRESS verifies that the current address family is either
1198  * GSOCK_NOFAMILY or GSOCK_*family*, and if it is GSOCK_NOFAMILY, it
1199  * initalizes it to be a GSOCK_*family*. In other cases, it returns
1200  * an appropiate error code.
1201  *
1202  * CHECK_ADDRESS_RETVAL does the same but returning 'retval' on error.
1203  */
1204 #define CHECK_ADDRESS(address, family)                              \
1205 {                                                                   \
1206   if (address->m_family == GSOCK_NOFAMILY)                          \
1207     if (_GAddress_Init_##family(address) != GSOCK_NOERROR)          \
1208       return address->m_error;                                      \
1209   if (address->m_family != GSOCK_##family)                          \
1210   {                                                                 \
1211     address->m_error = GSOCK_INVADDR;                               \
1212     return GSOCK_INVADDR;                                           \
1213   }                                                                 \
1214 }
1215
1216 #define CHECK_ADDRESS_RETVAL(address, family, retval)               \
1217 {                                                                   \
1218   if (address->m_family == GSOCK_NOFAMILY)                          \
1219     if (_GAddress_Init_##family(address) != GSOCK_NOERROR)          \
1220       return retval;                                                \
1221   if (address->m_family != GSOCK_##family)                          \
1222   {                                                                 \
1223     address->m_error = GSOCK_INVADDR;                               \
1224     return retval;                                                  \
1225   }                                                                 \
1226 }
1227
1228
1229 GAddress *GAddress_new(void)
1230 {
1231   GAddress *address;
1232
1233   if ((address = (GAddress *) malloc(sizeof(GAddress))) == NULL)
1234     return NULL;
1235
1236   address->m_family = GSOCK_NOFAMILY;
1237   address->m_addr   = NULL;
1238   address->m_len    = 0;
1239
1240   return address;
1241 }
1242
1243 GAddress *GAddress_copy(GAddress *address)
1244 {
1245   GAddress *addr2;
1246
1247   assert(address != NULL);
1248
1249   if ((addr2 = (GAddress *) malloc(sizeof(GAddress))) == NULL)
1250     return NULL;
1251
1252   memcpy(addr2, address, sizeof(GAddress));
1253
1254   if (address->m_addr)
1255   {
1256     addr2->m_addr = (struct sockaddr *) malloc(addr2->m_len);
1257     if (addr2->m_addr == NULL)
1258     {
1259       free(addr2);
1260       return NULL;
1261     }
1262     memcpy(addr2->m_addr, address->m_addr, addr2->m_len);
1263   }
1264
1265   return addr2;
1266 }
1267
1268 void GAddress_destroy(GAddress *address)
1269 {
1270   assert(address != NULL);
1271
1272   if (address->m_addr)
1273     free(address->m_addr);
1274
1275   free(address);
1276 }
1277
1278 void GAddress_SetFamily(GAddress *address, GAddressType type)
1279 {
1280   assert(address != NULL);
1281
1282   address->m_family = type;
1283 }
1284
1285 GAddressType GAddress_GetFamily(GAddress *address)
1286 {
1287   assert(address != NULL);
1288
1289   return address->m_family;
1290 }
1291
1292 GSocketError _GAddress_translate_from(GAddress *address,
1293                                       struct sockaddr *addr, int len)
1294 {
1295   address->m_realfamily = addr->sa_family;
1296   switch (addr->sa_family)
1297   {
1298     case AF_INET:
1299       address->m_family = GSOCK_INET;
1300       break;
1301     case AF_UNIX:
1302       address->m_family = GSOCK_UNIX;
1303       break;
1304 #ifdef AF_INET6
1305     case AF_INET6:
1306       address->m_family = GSOCK_INET6;
1307       break;
1308 #endif
1309     default:
1310     {
1311       address->m_error = GSOCK_INVOP;
1312       return GSOCK_INVOP;
1313     }
1314   }
1315
1316   if (address->m_addr)
1317     free(address->m_addr);
1318
1319   address->m_len = len;
1320   address->m_addr = (struct sockaddr *) malloc(len);
1321
1322   if (address->m_addr == NULL)
1323   {
1324     address->m_error = GSOCK_MEMERR;
1325     return GSOCK_MEMERR;
1326   }
1327   memcpy(address->m_addr, addr, len);
1328
1329   return GSOCK_NOERROR;
1330 }
1331
1332 GSocketError _GAddress_translate_to(GAddress *address,
1333                                     struct sockaddr **addr, int *len)
1334 {
1335   if (!address->m_addr)
1336   {
1337     address->m_error = GSOCK_INVADDR;
1338     return GSOCK_INVADDR;
1339   }
1340
1341   *len = address->m_len;
1342   *addr = (struct sockaddr *) malloc(address->m_len);
1343   if (*addr == NULL)
1344   {
1345     address->m_error = GSOCK_MEMERR;
1346     return GSOCK_MEMERR;
1347   }
1348
1349   memcpy(*addr, address->m_addr, address->m_len);
1350   return GSOCK_NOERROR;
1351 }
1352
1353 /*
1354  * -------------------------------------------------------------------------
1355  * Internet address family
1356  * -------------------------------------------------------------------------
1357  */
1358
1359 GSocketError _GAddress_Init_INET(GAddress *address)
1360 {
1361   address->m_len  = sizeof(struct sockaddr_in);
1362   address->m_addr = (struct sockaddr *) malloc(address->m_len);
1363   if (address->m_addr == NULL)
1364   {
1365     address->m_error = GSOCK_MEMERR;
1366     return GSOCK_MEMERR;
1367   }
1368
1369   address->m_family = GSOCK_INET;
1370   address->m_realfamily = AF_INET;
1371   ((struct sockaddr_in *)address->m_addr)->sin_family = AF_INET;
1372   ((struct sockaddr_in *)address->m_addr)->sin_addr.s_addr = INADDR_ANY;
1373
1374   return GSOCK_NOERROR;
1375 }
1376
1377 GSocketError GAddress_INET_SetHostName(GAddress *address, const char *hostname)
1378 {
1379   struct hostent *he;
1380   struct in_addr *addr;
1381
1382   assert(address != NULL);
1383
1384   CHECK_ADDRESS(address, INET);
1385
1386   addr = &(((struct sockaddr_in *)address->m_addr)->sin_addr);
1387
1388   addr->s_addr = inet_addr(hostname);
1389
1390   /* If it is a numeric host name, convert it now */
1391   if (addr->s_addr == INADDR_NONE)
1392   {
1393     struct in_addr *array_addr;
1394
1395     /* It is a real name, we solve it */
1396     if ((he = gethostbyname(hostname)) == NULL)
1397     {
1398       /* addr->s_addr = INADDR_NONE just done by inet_addr() above */
1399       address->m_error = GSOCK_NOHOST;
1400       return GSOCK_NOHOST;
1401     }
1402     array_addr = (struct in_addr *) *(he->h_addr_list);
1403     addr->s_addr = array_addr[0].s_addr;
1404   }
1405   return GSOCK_NOERROR;
1406 }
1407
1408 GSocketError GAddress_INET_SetAnyAddress(GAddress *address)
1409 {
1410   return GAddress_INET_SetHostAddress(address, INADDR_ANY);
1411 }
1412
1413 GSocketError GAddress_INET_SetHostAddress(GAddress *address,
1414                                           unsigned long hostaddr)
1415 {
1416   struct in_addr *addr;
1417
1418   assert(address != NULL);
1419
1420   CHECK_ADDRESS(address, INET);
1421
1422   addr = &(((struct sockaddr_in *)address->m_addr)->sin_addr);
1423   addr->s_addr = htonl(hostaddr);;
1424
1425   return GSOCK_NOERROR;
1426 }
1427
1428 GSocketError GAddress_INET_SetPortName(GAddress *address, const char *port,
1429                                        const char *protocol)
1430 {
1431   struct servent *se;
1432   struct sockaddr_in *addr;
1433
1434   assert(address != NULL);
1435   CHECK_ADDRESS(address, INET);
1436
1437   if (!port)
1438   {
1439     address->m_error = GSOCK_INVPORT;
1440     return GSOCK_INVPORT;
1441   }
1442
1443   se = getservbyname(port, protocol);
1444   if (!se)
1445   {
1446     if (isdigit(port[0]))
1447     {
1448       int port_int;
1449
1450       port_int = atoi(port);
1451       addr = (struct sockaddr_in *)address->m_addr;
1452       addr->sin_port = htons((u_short) port_int);
1453       return GSOCK_NOERROR;
1454     }
1455
1456     address->m_error = GSOCK_INVPORT;
1457     return GSOCK_INVPORT;
1458   }
1459
1460   addr = (struct sockaddr_in *)address->m_addr;
1461   addr->sin_port = se->s_port;
1462
1463   return GSOCK_NOERROR;
1464 }
1465
1466 GSocketError GAddress_INET_SetPort(GAddress *address, unsigned short port)
1467 {
1468   struct sockaddr_in *addr;
1469
1470   assert(address != NULL);
1471   CHECK_ADDRESS(address, INET);
1472
1473   addr = (struct sockaddr_in *)address->m_addr;
1474   addr->sin_port = htons(port);
1475
1476   return GSOCK_NOERROR;
1477 }
1478
1479 GSocketError GAddress_INET_GetHostName(GAddress *address, char *hostname, size_t sbuf)
1480 {
1481   struct hostent *he;
1482   char *addr_buf;
1483   struct sockaddr_in *addr;
1484
1485   assert(address != NULL);
1486   CHECK_ADDRESS(address, INET);
1487
1488   addr = (struct sockaddr_in *)address->m_addr;
1489   addr_buf = (char *)&(addr->sin_addr);
1490
1491   he = gethostbyaddr(addr_buf, sizeof(addr->sin_addr), AF_INET);
1492   if (he == NULL)
1493   {
1494     address->m_error = GSOCK_NOHOST;
1495     return GSOCK_NOHOST;
1496   }
1497
1498   strncpy(hostname, he->h_name, sbuf);
1499
1500   return GSOCK_NOERROR;
1501 }
1502
1503 unsigned long GAddress_INET_GetHostAddress(GAddress *address)
1504 {
1505   struct sockaddr_in *addr;
1506
1507   assert(address != NULL);
1508   CHECK_ADDRESS_RETVAL(address, INET, 0);
1509
1510   addr = (struct sockaddr_in *)address->m_addr;
1511
1512   return ntohl(addr->sin_addr.s_addr);
1513 }
1514
1515 unsigned short GAddress_INET_GetPort(GAddress *address)
1516 {
1517   struct sockaddr_in *addr;
1518
1519   assert(address != NULL);
1520   CHECK_ADDRESS_RETVAL(address, INET, 0);
1521
1522   addr = (struct sockaddr_in *)address->m_addr;
1523   return ntohs(addr->sin_port);
1524 }
1525
1526 /*
1527  * -------------------------------------------------------------------------
1528  * Unix address family
1529  * -------------------------------------------------------------------------
1530  */
1531
1532 GSocketError _GAddress_Init_UNIX(GAddress *address)
1533 {
1534   assert (address != NULL);
1535   address->m_error = GSOCK_INVADDR;
1536   return GSOCK_INVADDR;
1537 }
1538
1539 GSocketError GAddress_UNIX_SetPath(GAddress *address, const char *WXUNUSED(path))
1540 {
1541   assert (address != NULL);
1542   address->m_error = GSOCK_INVADDR;
1543   return GSOCK_INVADDR;
1544 }
1545
1546 GSocketError GAddress_UNIX_GetPath(GAddress *address, char *WXUNUSED(path), size_t WXUNUSED(sbuf))
1547 {
1548   assert (address != NULL);
1549   address->m_error = GSOCK_INVADDR;
1550   return GSOCK_INVADDR;
1551 }
1552
1553 #else /* !wxUSE_SOCKETS */
1554
1555 /*
1556  * Translation unit shouldn't be empty, so include this typedef to make the
1557  * compiler (VC++ 6.0, for example) happy
1558  */
1559 typedef void (*wxDummy)();
1560
1561 #endif  /* wxUSE_SOCKETS || defined(__GSOCKET_STANDALONE__) */
1562