src/msw/gsocket.cpp

   1 /* -------------------------------------------------------------------------
   2  * Project: GSocket (Generic Socket)
   3  * Name:    gsocket.cpp
   4  * Author:  Guillermo Rodriguez Garcia <guille@iies.es>
   5  * Purpose: GSocket main MSW file
   6  * Licence: The wxWindows licence
   7  * CVSID:   $Id$
   8  * -------------------------------------------------------------------------
   9  */
  10
  11 // For compilers that support precompilation, includes "wx.h".
  12 #include "wx/wxprec.h"
  13
  14 #ifdef __BORLANDC__
  15     #pragma hdrstop
  16 #endif
  17
  18 #ifdef _MSC_VER
  19    /* RPCNOTIFICATION_ROUTINE in rasasync.h (included from winsock.h),
  20     * warning: conditional expression is constant.
  21     */
  22 #  pragma warning(disable:4115)
  23    /* FD_SET,
  24     * warning: named type definition in parentheses.
  25     */
  26 #  pragma warning(disable:4127)
  27    /* GAddress_UNIX_GetPath,
  28     * warning: unreferenced formal parameter.
  29     */
  30 #  pragma warning(disable:4100)
  31
  32 #ifdef __WXWINCE__
  33     /* windows.h results in tons of warnings at max warning level */
  34 #   ifdef _MSC_VER
  35 #       pragma warning(push, 1)
  36 #   endif
  37 #   include <windows.h>
  38 #   ifdef _MSC_VER
  39 #       pragma warning(pop)
  40 #       pragma warning(disable:4514)
  41 #   endif
  42 #endif
  43
  44 #endif /* _MSC_VER */
  45
  46 #include <winsock.h>
  47
  48 #ifndef __GSOCKET_STANDALONE__
  49 #   include "wx/platform.h"
  50 #   include "wx/setup.h"
  51 #endif
  52
  53 #if wxUSE_SOCKETS || defined(__GSOCKET_STANDALONE__)
  54
  55 #ifndef __GSOCKET_STANDALONE__
  56 #  include "wx/msw/gsockmsw.h"
  57 #  include "wx/gsocket.h"
  58 #else
  59 #  include "gsockmsw.h"
  60 #  include "gsocket.h"
  61 #endif /* __GSOCKET_STANDALONE__ */
  62
  63 #ifndef __WXWINCE__
  64 #include <assert.h>
  65 #else
  66 #define assert(x)
  67 #ifndef isdigit
  68 #define isdigit(x) (x > 47 && x < 58)
  69 #endif
  70 #include "wx/msw/wince/net.h"
  71 #endif
  72
  73 #include <string.h>
  74 #include <stdio.h>
  75 #include <stdlib.h>
  76 #include <stddef.h>
  77 #include <ctype.h>
  78
  79 /* if we use configure for MSW SOCKLEN_T will be already defined */
  80 #ifndef SOCKLEN_T
  81 #  define SOCKLEN_T int
  82 #endif
  83
  84 /* Table of GUI-related functions. We must call them indirectly because
  85  * of wxBase and GUI separation: */
  86
  87 static GSocketGUIFunctionsTable *gs_gui_functions;
  88
  89 class GSocketGUIFunctionsTableNull: public GSocketGUIFunctionsTable
  90 {
  91 public:
  92     virtual bool OnInit();
  93     virtual void OnExit();
  94     virtual bool CanUseEventLoop();
  95     virtual bool Init_Socket(GSocket *socket);
  96     virtual void Destroy_Socket(GSocket *socket);
  97     virtual void Enable_Events(GSocket *socket);
  98     virtual void Disable_Events(GSocket *socket);
  99 };
 100
 101 bool GSocketGUIFunctionsTableNull::OnInit()
 102 {   return true; }
 103 void GSocketGUIFunctionsTableNull::OnExit()
 104 {}
 105 bool GSocketGUIFunctionsTableNull::CanUseEventLoop()
 106 {   return false; }
 107 bool GSocketGUIFunctionsTableNull::Init_Socket(GSocket *WXUNUSED(socket))
 108 {   return true; }
 109 void GSocketGUIFunctionsTableNull::Destroy_Socket(GSocket *WXUNUSED(socket))
 110 {}
 111 void GSocketGUIFunctionsTableNull::Enable_Events(GSocket *WXUNUSED(socket))
 112 {}
 113 void GSocketGUIFunctionsTableNull::Disable_Events(GSocket *WXUNUSED(socket))
 114 {}
 115 /* Global initialisers */
 116
 117 void GSocket_SetGUIFunctions(GSocketGUIFunctionsTable *guifunc)
 118 {
 119   gs_gui_functions = guifunc;
 120 }
 121
 122 int GSocket_Init(void)
 123 {
 124   WSADATA wsaData;
 125
 126   if (!gs_gui_functions)
 127   {
 128     static GSocketGUIFunctionsTableNull table;
 129     gs_gui_functions = &table;
 130   }
 131   if ( !gs_gui_functions->OnInit() )
 132   {
 133     return 0;
 134   }
 135
 136   /* Initialize WinSocket */
 137   return (WSAStartup((1 << 8) | 1, &wsaData) == 0);
 138 }
 139
 140 void GSocket_Cleanup(void)
 141 {
 142   if (gs_gui_functions)
 143   {
 144       gs_gui_functions->OnExit();
 145   }
 146
 147   /* Cleanup WinSocket */
 148   WSACleanup();
 149 }
 150
 151 /* Constructors / Destructors for GSocket */
 152
 153 GSocket::GSocket()
 154 {
 155   int i;
 156
 157   m_fd              = INVALID_SOCKET;
 158   for (i = 0; i < GSOCK_MAX_EVENT; i++)
 159   {
 160     m_cbacks[i]     = NULL;
 161   }
 162   m_detected        = 0;
 163   m_local           = NULL;
 164   m_peer            = NULL;
 165   m_error           = GSOCK_NOERROR;
 166   m_server          = false;
 167   m_stream          = true;
 168   m_non_blocking    = false;
 169   m_timeout.tv_sec  = 10 * 60;  /* 10 minutes */
 170   m_timeout.tv_usec = 0;
 171   m_establishing    = false;
 172   m_reusable        = false;
 173
 174   assert(gs_gui_functions);
 175   /* Per-socket GUI-specific initialization */
 176   m_ok = gs_gui_functions->Init_Socket(this);
 177 }
 178
 179 void GSocket::Close()
 180 {
 181     gs_gui_functions->Disable_Events(this);
 182     closesocket(m_fd);
 183     m_fd = INVALID_SOCKET;
 184 }
 185
 186 GSocket::~GSocket()
 187 {
 188   assert(this);
 189
 190   /* Per-socket GUI-specific cleanup */
 191   gs_gui_functions->Destroy_Socket(this);
 192
 193   /* Check that the socket is really shutdowned */
 194   if (m_fd != INVALID_SOCKET)
 195     Shutdown();
 196
 197   /* Destroy private addresses */
 198   if (m_local)
 199     GAddress_destroy(m_local);
 200
 201   if (m_peer)
 202     GAddress_destroy(m_peer);
 203 }
 204
 205 /* GSocket_Shutdown:
 206  *  Disallow further read/write operations on this socket, close
 207  *  the fd and disable all callbacks.
 208  */
 209 void GSocket::Shutdown()
 210 {
 211   int evt;
 212
 213   assert(this);
 214
 215   /* If socket has been created, shutdown it */
 216   if (m_fd != INVALID_SOCKET)
 217   {
 218     shutdown(m_fd, 2);
 219     Close();
 220   }
 221
 222   /* Disable GUI callbacks */
 223   for (evt = 0; evt < GSOCK_MAX_EVENT; evt++)
 224     m_cbacks[evt] = NULL;
 225
 226   m_detected = GSOCK_LOST_FLAG;
 227 }
 228
 229 /* Address handling */
 230
 231 /* GSocket_SetLocal:
 232  * GSocket_GetLocal:
 233  * GSocket_SetPeer:
 234  * GSocket_GetPeer:
 235  *  Set or get the local or peer address for this socket. The 'set'
 236  *  functions return GSOCK_NOERROR on success, an error code otherwise.
 237  *  The 'get' functions return a pointer to a GAddress object on success,
 238  *  or NULL otherwise, in which case they set the error code of the
 239  *  corresponding GSocket.
 240  *
 241  *  Error codes:
 242  *    GSOCK_INVSOCK - the socket is not valid.
 243  *    GSOCK_INVADDR - the address is not valid.
 244  */
 245 GSocketError GSocket::SetLocal(GAddress *address)
 246 {
 247   assert(this);
 248
 249   /* the socket must be initialized, or it must be a server */
 250   if (m_fd != INVALID_SOCKET && !m_server)
 251   {
 252     m_error = GSOCK_INVSOCK;
 253     return GSOCK_INVSOCK;
 254   }
 255
 256   /* check address */
 257   if (address == NULL || address->m_family == GSOCK_NOFAMILY)
 258   {
 259     m_error = GSOCK_INVADDR;
 260     return GSOCK_INVADDR;
 261   }
 262
 263   if (m_local)
 264     GAddress_destroy(m_local);
 265
 266   m_local = GAddress_copy(address);
 267
 268   return GSOCK_NOERROR;
 269 }
 270
 271 GSocketError GSocket::SetPeer(GAddress *address)
 272 {
 273   assert(this);
 274
 275   /* check address */
 276   if (address == NULL || address->m_family == GSOCK_NOFAMILY)
 277   {
 278     m_error = GSOCK_INVADDR;
 279     return GSOCK_INVADDR;
 280   }
 281
 282   if (m_peer)
 283     GAddress_destroy(m_peer);
 284
 285   m_peer = GAddress_copy(address);
 286
 287   return GSOCK_NOERROR;
 288 }
 289
 290 GAddress *GSocket::GetLocal()
 291 {
 292   GAddress *address;
 293   struct sockaddr addr;
 294   SOCKLEN_T size = sizeof(addr);
 295   GSocketError err;
 296
 297   assert(this);
 298
 299   /* try to get it from the m_local var first */
 300   if (m_local)
 301     return GAddress_copy(m_local);
 302
 303   /* else, if the socket is initialized, try getsockname */
 304   if (m_fd == INVALID_SOCKET)
 305   {
 306     m_error = GSOCK_INVSOCK;
 307     return NULL;
 308   }
 309
 310   if (getsockname(m_fd, &addr, &size) == SOCKET_ERROR)
 311   {
 312     m_error = GSOCK_IOERR;
 313     return NULL;
 314   }
 315
 316   /* got a valid address from getsockname, create a GAddress object */
 317   if ((address = GAddress_new()) == NULL)
 318   {
 319      m_error = GSOCK_MEMERR;
 320      return NULL;
 321   }
 322
 323   if ((err = _GAddress_translate_from(address, &addr, size)) != GSOCK_NOERROR)
 324   {
 325      GAddress_destroy(address);
 326      m_error = err;
 327      return NULL;
 328   }
 329
 330   return address;
 331 }
 332
 333 GAddress *GSocket::GetPeer()
 334 {
 335   assert(this);
 336
 337   /* try to get it from the m_peer var */
 338   if (m_peer)
 339     return GAddress_copy(m_peer);
 340
 341   return NULL;
 342 }
 343
 344 /* Server specific parts */
 345
 346 /* GSocket_SetServer:
 347  *  Sets up this socket as a server. The local address must have been
 348  *  set with GSocket_SetLocal() before GSocket_SetServer() is called.
 349  *  Returns GSOCK_NOERROR on success, one of the following otherwise:
 350  *
 351  *  Error codes:
 352  *    GSOCK_INVSOCK - the socket is in use.
 353  *    GSOCK_INVADDR - the local address has not been set.
 354  *    GSOCK_IOERR   - low-level error.
 355  */
 356 GSocketError GSocket::SetServer()
 357 {
 358   u_long arg = 1;
 359
 360   assert(this);
 361
 362   /* must not be in use */
 363   if (m_fd != INVALID_SOCKET)
 364   {
 365     m_error = GSOCK_INVSOCK;
 366     return GSOCK_INVSOCK;
 367   }
 368
 369   /* the local addr must have been set */
 370   if (!m_local)
 371   {
 372     m_error = GSOCK_INVADDR;
 373     return GSOCK_INVADDR;
 374   }
 375
 376   /* Initialize all fields */
 377   m_server   = true;
 378   m_stream   = true;
 379
 380   /* Create the socket */
 381   m_fd = socket(m_local->m_realfamily, SOCK_STREAM, 0);
 382
 383   if (m_fd == INVALID_SOCKET)
 384   {
 385     m_error = GSOCK_IOERR;
 386     return GSOCK_IOERR;
 387   }
 388
 389   ioctlsocket(m_fd, FIONBIO, (u_long FAR *) &arg);
 390   gs_gui_functions->Enable_Events(this);
 391
 392   /* allow a socket to re-bind if the socket is in the TIME_WAIT
 393      state after being previously closed.
 394    */
 395   if (m_reusable) {
 396     setsockopt(m_fd, SOL_SOCKET, SO_REUSEADDR, (const char*)&arg, sizeof(u_long));
 397   }
 398
 399   /* Bind to the local address,
 400    * retrieve the actual address bound,
 401    * and listen up to 5 connections.
 402    */
 403   if ((bind(m_fd, m_local->m_addr, m_local->m_len) != 0) ||
 404       (getsockname(m_fd,
 405                    m_local->m_addr,
 406                    (SOCKLEN_T *)&m_local->m_len) != 0) ||
 407       (listen(m_fd, 5) != 0))
 408   {
 409     Close();
 410     m_error = GSOCK_IOERR;
 411     return GSOCK_IOERR;
 412   }
 413
 414   return GSOCK_NOERROR;
 415 }
 416
 417 /* GSocket_WaitConnection:
 418  *  Waits for an incoming client connection. Returns a pointer to
 419  *  a GSocket object, or NULL if there was an error, in which case
 420  *  the last error field will be updated for the calling GSocket.
 421  *
 422  *  Error codes (set in the calling GSocket)
 423  *    GSOCK_INVSOCK    - the socket is not valid or not a server.
 424  *    GSOCK_TIMEDOUT   - timeout, no incoming connections.
 425  *    GSOCK_WOULDBLOCK - the call would block and the socket is nonblocking.
 426  *    GSOCK_MEMERR     - couldn't allocate memory.
 427  *    GSOCK_IOERR      - low-level error.
 428  */
 429 GSocket *GSocket::WaitConnection()
 430 {
 431   GSocket *connection;
 432   struct sockaddr from;
 433   SOCKLEN_T fromlen = sizeof(from);
 434   GSocketError err;
 435   u_long arg = 1;
 436
 437   assert(this);
 438
 439   /* Reenable CONNECTION events */
 440   m_detected &= ~GSOCK_CONNECTION_FLAG;
 441
 442   /* If the socket has already been created, we exit immediately */
 443   if (m_fd == INVALID_SOCKET || !m_server)
 444   {
 445     m_error = GSOCK_INVSOCK;
 446     return NULL;
 447   }
 448
 449   /* Create a GSocket object for the new connection */
 450   connection = GSocket_new();
 451
 452   if (!connection)
 453   {
 454     m_error = GSOCK_MEMERR;
 455     return NULL;
 456   }
 457
 458   /* Wait for a connection (with timeout) */
 459   if (Input_Timeout() == GSOCK_TIMEDOUT)
 460   {
 461     delete connection;
 462     /* m_error set by _GSocket_Input_Timeout */
 463     return NULL;
 464   }
 465
 466   connection->m_fd = accept(m_fd, &from, &fromlen);
 467
 468   if (connection->m_fd == INVALID_SOCKET)
 469   {
 470     if (WSAGetLastError() == WSAEWOULDBLOCK)
 471       m_error = GSOCK_WOULDBLOCK;
 472     else
 473       m_error = GSOCK_IOERR;
 474
 475     delete connection;
 476     return NULL;
 477   }
 478
 479   /* Initialize all fields */
 480   connection->m_server   = false;
 481   connection->m_stream   = true;
 482
 483   /* Setup the peer address field */
 484   connection->m_peer = GAddress_new();
 485   if (!connection->m_peer)
 486   {
 487     delete connection;
 488     m_error = GSOCK_MEMERR;
 489     return NULL;
 490   }
 491   err = _GAddress_translate_from(connection->m_peer, &from, fromlen);
 492   if (err != GSOCK_NOERROR)
 493   {
 494     GAddress_destroy(connection->m_peer);
 495     delete connection;
 496     m_error = err;
 497     return NULL;
 498   }
 499
 500   ioctlsocket(connection->m_fd, FIONBIO, (u_long FAR *) &arg);
 501   gs_gui_functions->Enable_Events(connection);
 502
 503   return connection;
 504 }
 505
 506 /* GSocket_SetReusable:
 507 *  Simply sets the m_resuable flag on the socket. GSocket_SetServer will
 508 *  make the appropriate setsockopt() call.
 509 *  Implemented as a GSocket function because clients (ie, wxSocketServer)
 510 *  don't have access to the GSocket struct information.
 511 *  Returns true if the flag was set correctly, false if an error occured
 512 *  (ie, if the parameter was NULL)
 513 */
 514 bool GSocket::SetReusable()
 515 {
 516     /* socket must not be null, and must not be in use/already bound */
 517     if (this && m_fd == INVALID_SOCKET) {
 518         m_reusable = true;
 519         return true;
 520     }
 521     return false;
 522 }
 523
 524 /* Client specific parts */
 525
 526 /* GSocket_Connect:
 527  *  For stream (connection oriented) sockets, GSocket_Connect() tries
 528  *  to establish a client connection to a server using the peer address
 529  *  as established with GSocket_SetPeer(). Returns GSOCK_NOERROR if the
 530  *  connection has been succesfully established, or one of the error
 531  *  codes listed below. Note that for nonblocking sockets, a return
 532  *  value of GSOCK_WOULDBLOCK doesn't mean a failure. The connection
 533  *  request can be completed later; you should use GSocket_Select()
 534  *  to poll for GSOCK_CONNECTION | GSOCK_LOST, or wait for the
 535  *  corresponding asynchronous events.
 536  *
 537  *  For datagram (non connection oriented) sockets, GSocket_Connect()
 538  *  just sets the peer address established with GSocket_SetPeer() as
 539  *  default destination.
 540  *
 541  *  Error codes:
 542  *    GSOCK_INVSOCK    - the socket is in use or not valid.
 543  *    GSOCK_INVADDR    - the peer address has not been established.
 544  *    GSOCK_TIMEDOUT   - timeout, the connection failed.
 545  *    GSOCK_WOULDBLOCK - connection in progress (nonblocking sockets only)
 546  *    GSOCK_MEMERR     - couldn't allocate memory.
 547  *    GSOCK_IOERR      - low-level error.
 548  */
 549 GSocketError GSocket::Connect(GSocketStream stream)
 550 {
 551   int ret, err;
 552   u_long arg = 1;
 553
 554   assert(this);
 555
 556   /* Enable CONNECTION events (needed for nonblocking connections) */
 557   m_detected &= ~GSOCK_CONNECTION_FLAG;
 558
 559   if (m_fd != INVALID_SOCKET)
 560   {
 561     m_error = GSOCK_INVSOCK;
 562     return GSOCK_INVSOCK;
 563   }
 564
 565   if (!m_peer)
 566   {
 567     m_error = GSOCK_INVADDR;
 568     return GSOCK_INVADDR;
 569   }
 570
 571   /* Streamed or dgram socket? */
 572   m_stream   = (stream == GSOCK_STREAMED);
 573   m_server   = false;
 574   m_establishing = false;
 575
 576   /* Create the socket */
 577   m_fd = socket(m_peer->m_realfamily,
 578                      m_stream? SOCK_STREAM : SOCK_DGRAM, 0);
 579
 580   if (m_fd == INVALID_SOCKET)
 581   {
 582     m_error = GSOCK_IOERR;
 583     return GSOCK_IOERR;
 584   }
 585
 586   ioctlsocket(m_fd, FIONBIO, (u_long FAR *) &arg);
 587   gs_gui_functions->Enable_Events(this);
 588
 589   /* Connect it to the peer address, with a timeout (see below) */
 590   ret = connect(m_fd, m_peer->m_addr, m_peer->m_len);
 591
 592   if (ret == SOCKET_ERROR)
 593   {
 594     err = WSAGetLastError();
 595
 596     /* If connect failed with EWOULDBLOCK and the GSocket object
 597      * is in blocking mode, we select() for the specified timeout
 598      * checking for writability to see if the connection request
 599      * completes.
 600      */
 601     if ((err == WSAEWOULDBLOCK) && (!m_non_blocking))
 602     {
 603       err = Connect_Timeout();
 604
 605       if (err != GSOCK_NOERROR)
 606       {
 607         Close();
 608         /* m_error is set in _GSocket_Connect_Timeout */
 609       }
 610
 611       return (GSocketError) err;
 612     }
 613
 614     /* If connect failed with EWOULDBLOCK and the GSocket object
 615      * is set to nonblocking, we set m_error to GSOCK_WOULDBLOCK
 616      * (and return GSOCK_WOULDBLOCK) but we don't close the socket;
 617      * this way if the connection completes, a GSOCK_CONNECTION
 618      * event will be generated, if enabled.
 619      */
 620     if ((err == WSAEWOULDBLOCK) && (m_non_blocking))
 621     {
 622       m_establishing = true;
 623       m_error = GSOCK_WOULDBLOCK;
 624       return GSOCK_WOULDBLOCK;
 625     }
 626
 627     /* If connect failed with an error other than EWOULDBLOCK,
 628      * then the call to GSocket_Connect() has failed.
 629      */
 630     Close();
 631     m_error = GSOCK_IOERR;
 632     return GSOCK_IOERR;
 633   }
 634
 635   return GSOCK_NOERROR;
 636 }
 637
 638 /* Datagram sockets */
 639
 640 /* GSocket_SetNonOriented:
 641  *  Sets up this socket as a non-connection oriented (datagram) socket.
 642  *  Before using this function, the local address must have been set
 643  *  with GSocket_SetLocal(), or the call will fail. Returns GSOCK_NOERROR
 644  *  on success, or one of the following otherwise.
 645  *
 646  *  Error codes:
 647  *    GSOCK_INVSOCK - the socket is in use.
 648  *    GSOCK_INVADDR - the local address has not been set.
 649  *    GSOCK_IOERR   - low-level error.
 650  */
 651 GSocketError GSocket::SetNonOriented()
 652 {
 653   u_long arg = 1;
 654
 655   assert(this);
 656
 657   if (m_fd != INVALID_SOCKET)
 658   {
 659     m_error = GSOCK_INVSOCK;
 660     return GSOCK_INVSOCK;
 661   }
 662
 663   if (!m_local)
 664   {
 665     m_error = GSOCK_INVADDR;
 666     return GSOCK_INVADDR;
 667   }
 668
 669   /* Initialize all fields */
 670   m_stream   = false;
 671   m_server   = false;
 672
 673   /* Create the socket */
 674   m_fd = socket(m_local->m_realfamily, SOCK_DGRAM, 0);
 675
 676   if (m_fd == INVALID_SOCKET)
 677   {
 678     m_error = GSOCK_IOERR;
 679     return GSOCK_IOERR;
 680   }
 681
 682   ioctlsocket(m_fd, FIONBIO, (u_long FAR *) &arg);
 683   gs_gui_functions->Enable_Events(this);
 684
 685   /* Bind to the local address,
 686    * and retrieve the actual address bound.
 687    */
 688   if ((bind(m_fd, m_local->m_addr, m_local->m_len) != 0) ||
 689       (getsockname(m_fd,
 690                    m_local->m_addr,
 691                    (SOCKLEN_T *)&m_local->m_len) != 0))
 692   {
 693     Close();
 694     m_error = GSOCK_IOERR;
 695     return GSOCK_IOERR;
 696   }
 697
 698   return GSOCK_NOERROR;
 699 }
 700
 701 /* Generic IO */
 702
 703 /* Like recv(), send(), ... */
 704 int GSocket::Read(char *buffer, int size)
 705 {
 706   int ret;
 707
 708   assert(this);
 709
 710   /* Reenable INPUT events */
 711   m_detected &= ~GSOCK_INPUT_FLAG;
 712
 713   if (m_fd == INVALID_SOCKET || m_server)
 714   {
 715     m_error = GSOCK_INVSOCK;
 716     return -1;
 717   }
 718
 719   /* If the socket is blocking, wait for data (with a timeout) */
 720   if (Input_Timeout() == GSOCK_TIMEDOUT)
 721     return -1;
 722
 723   /* Read the data */
 724   if (m_stream)
 725     ret = Recv_Stream(buffer, size);
 726   else
 727     ret = Recv_Dgram(buffer, size);
 728
 729   if (ret == SOCKET_ERROR)
 730   {
 731     if (WSAGetLastError() != WSAEWOULDBLOCK)
 732       m_error = GSOCK_IOERR;
 733     else
 734       m_error = GSOCK_WOULDBLOCK;
 735     return -1;
 736   }
 737
 738   return ret;
 739 }
 740
 741 int GSocket::Write(const char *buffer, int size)
 742 {
 743   int ret;
 744
 745   assert(this);
 746
 747   if (m_fd == INVALID_SOCKET || m_server)
 748   {
 749     m_error = GSOCK_INVSOCK;
 750     return -1;
 751   }
 752
 753   /* If the socket is blocking, wait for writability (with a timeout) */
 754   if (Output_Timeout() == GSOCK_TIMEDOUT)
 755     return -1;
 756
 757   /* Write the data */
 758   if (m_stream)
 759     ret = Send_Stream(buffer, size);
 760   else
 761     ret = Send_Dgram(buffer, size);
 762
 763   if (ret == SOCKET_ERROR)
 764   {
 765     if (WSAGetLastError() != WSAEWOULDBLOCK)
 766       m_error = GSOCK_IOERR;
 767     else
 768       m_error = GSOCK_WOULDBLOCK;
 769
 770     /* Only reenable OUTPUT events after an error (just like WSAAsyncSelect
 771      * does). Once the first OUTPUT event is received, users can assume
 772      * that the socket is writable until a read operation fails. Only then
 773      * will further OUTPUT events be posted.
 774      */
 775     m_detected &= ~GSOCK_OUTPUT_FLAG;
 776     return -1;
 777   }
 778
 779   return ret;
 780 }
 781
 782 /* GSocket_Select:
 783  *  Polls the socket to determine its status. This function will
 784  *  check for the events specified in the 'flags' parameter, and
 785  *  it will return a mask indicating which operations can be
 786  *  performed. This function won't block, regardless of the
 787  *  mode (blocking | nonblocking) of the socket.
 788  */
 789 GSocketEventFlags GSocket::Select(GSocketEventFlags flags)
 790 {
 791   if (!gs_gui_functions->CanUseEventLoop())
 792   {
 793     GSocketEventFlags result = 0;
 794     fd_set readfds;
 795     fd_set writefds;
 796     fd_set exceptfds;
 797
 798     assert(this);
 799
 800     FD_ZERO(&readfds);
 801     FD_ZERO(&writefds);
 802     FD_ZERO(&exceptfds);
 803     FD_SET(m_fd, &readfds);
 804     if (flags & GSOCK_OUTPUT_FLAG || flags & GSOCK_CONNECTION_FLAG)
 805       FD_SET(m_fd, &writefds);
 806     FD_SET(m_fd, &exceptfds);
 807
 808     /* Check 'sticky' CONNECTION flag first */
 809     result |= (GSOCK_CONNECTION_FLAG & m_detected);
 810
 811     /* If we have already detected a LOST event, then don't try
 812      * to do any further processing.
 813      */
 814     if ((m_detected & GSOCK_LOST_FLAG) != 0)
 815     {
 816       m_establishing = false;
 817
 818       return (GSOCK_LOST_FLAG & flags);
 819     }
 820
 821     /* Try select now */
 822     if (select(m_fd + 1, &readfds, &writefds, &exceptfds,
 823         &m_timeout) <= 0)
 824     {
 825       /* What to do here? */
 826       return (result & flags);
 827     }
 828
 829     /* Check for readability */
 830     if (FD_ISSET(m_fd, &readfds))
 831     {
 832       char c;
 833
 834       if (!m_stream || recv(m_fd, &c, 1, MSG_PEEK) > 0)
 835       {
 836         result |= GSOCK_INPUT_FLAG;
 837       }
 838       else
 839       {
 840         if (m_server && m_stream)
 841         {
 842           result |= GSOCK_CONNECTION_FLAG;
 843           m_detected |= GSOCK_CONNECTION_FLAG;
 844         }
 845         else
 846         {
 847           m_detected = GSOCK_LOST_FLAG;
 848           m_establishing = false;
 849
 850           /* LOST event: Abort any further processing */
 851           return (GSOCK_LOST_FLAG & flags);
 852         }
 853       }
 854     }
 855
 856     /* Check for writability */
 857     if (FD_ISSET(m_fd, &writefds))
 858     {
 859       if (m_establishing && !m_server)
 860       {
 861         int error;
 862         SOCKLEN_T len = sizeof(error);
 863
 864         m_establishing = false;
 865
 866         getsockopt(m_fd, SOL_SOCKET, SO_ERROR, (char*)&error, &len);
 867
 868         if (error)
 869         {
 870           m_detected = GSOCK_LOST_FLAG;
 871
 872           /* LOST event: Abort any further processing */
 873           return (GSOCK_LOST_FLAG & flags);
 874         }
 875         else
 876         {
 877           result |= GSOCK_CONNECTION_FLAG;
 878           m_detected |= GSOCK_CONNECTION_FLAG;
 879         }
 880       }
 881       else
 882       {
 883         result |= GSOCK_OUTPUT_FLAG;
 884       }
 885     }
 886
 887     /* Check for exceptions and errors (is this useful in Unices?) */
 888     if (FD_ISSET(m_fd, &exceptfds))
 889     {
 890       m_establishing = false;
 891       m_detected = GSOCK_LOST_FLAG;
 892
 893       /* LOST event: Abort any further processing */
 894       return (GSOCK_LOST_FLAG & flags);
 895     }
 896
 897     return (result & flags);
 898   }
 899   else /* USE_GUI() */
 900   {
 901     assert(this);
 902     return flags & m_detected;
 903   }
 904 }
 905
 906 /* Attributes */
 907
 908 /* GSocket_SetNonBlocking:
 909  *  Sets the socket to non-blocking mode. All IO calls will return
 910  *  immediately.
 911  */
 912 void GSocket::SetNonBlocking(bool non_block)
 913 {
 914   assert(this);
 915
 916   m_non_blocking = non_block;
 917 }
 918
 919 /* GSocket_SetTimeout:
 920  *  Sets the timeout for blocking calls. Time is expressed in
 921  *  milliseconds.
 922  */
 923 void GSocket::SetTimeout(unsigned long millis)
 924 {
 925   assert(this);
 926
 927   m_timeout.tv_sec  = (millis / 1000);
 928   m_timeout.tv_usec = (millis % 1000) * 1000;
 929 }
 930
 931 /* GSocket_GetError:
 932  *  Returns the last error occured for this socket. Note that successful
 933  *  operations do not clear this back to GSOCK_NOERROR, so use it only
 934  *  after an error.
 935  */
 936 GSocketError WXDLLIMPEXP_NET GSocket::GetError()
 937 {
 938   assert(this);
 939
 940   return m_error;
 941 }
 942
 943 /* Callbacks */
 944
 945 /* GSOCK_INPUT:
 946  *   There is data to be read in the input buffer. If, after a read
 947  *   operation, there is still data available, the callback function will
 948  *   be called again.
 949  * GSOCK_OUTPUT:
 950  *   The socket is available for writing. That is, the next write call
 951  *   won't block. This event is generated only once, when the connection is
 952  *   first established, and then only if a call failed with GSOCK_WOULDBLOCK,
 953  *   when the output buffer empties again. This means that the app should
 954  *   assume that it can write since the first OUTPUT event, and no more
 955  *   OUTPUT events will be generated unless an error occurs.
 956  * GSOCK_CONNECTION:
 957  *   Connection succesfully established, for client sockets, or incoming
 958  *   client connection, for server sockets. Wait for this event (also watch
 959  *   out for GSOCK_LOST) after you issue a nonblocking GSocket_Connect() call.
 960  * GSOCK_LOST:
 961  *   The connection is lost (or a connection request failed); this could
 962  *   be due to a failure, or due to the peer closing it gracefully.
 963  */
 964
 965 /* GSocket_SetCallback:
 966  *  Enables the callbacks specified by 'flags'. Note that 'flags'
 967  *  may be a combination of flags OR'ed toghether, so the same
 968  *  callback function can be made to accept different events.
 969  *  The callback function must have the following prototype:
 970  *
 971  *  void function(GSocket *socket, GSocketEvent event, char *cdata)
 972  */
 973 void GSocket::SetCallback(GSocketEventFlags flags,
 974                          GSocketCallback callback, char *cdata)
 975 {
 976   int count;
 977
 978   assert(this);
 979
 980   for (count = 0; count < GSOCK_MAX_EVENT; count++)
 981   {
 982     if ((flags & (1 << count)) != 0)
 983     {
 984       m_cbacks[count] = callback;
 985       m_data[count] = cdata;
 986     }
 987   }
 988 }
 989
 990 /* GSocket_UnsetCallback:
 991  *  Disables all callbacks specified by 'flags', which may be a
 992  *  combination of flags OR'ed toghether.
 993  */
 994 void GSocket::UnsetCallback(GSocketEventFlags flags)
 995 {
 996   int count;
 997
 998   assert(this);
 999
1000   for (count = 0; count < GSOCK_MAX_EVENT; count++)
1001   {
1002     if ((flags & (1 << count)) != 0)
1003     {
1004       m_cbacks[count] = NULL;
1005       m_data[count] = NULL;
1006     }
1007   }
1008 }
1009
1010 GSocketError GSocket::GetSockOpt(int level, int optname,
1011                                 void *optval, int *optlen)
1012 {
1013     if (getsockopt(m_fd, level, optname, (char*)optval, optlen) == 0)
1014     {
1015         return GSOCK_NOERROR;
1016     }
1017     return GSOCK_OPTERR;
1018 }
1019
1020 GSocketError GSocket::SetSockOpt(int level, int optname,
1021                                 const void *optval, int optlen)
1022 {
1023     if (setsockopt(m_fd, level, optname, (char*)optval, optlen) == 0)
1024     {
1025         return GSOCK_NOERROR;
1026     }
1027     return GSOCK_OPTERR;
1028 }
1029
1030 /* Internals (IO) */
1031
1032 /* _GSocket_Input_Timeout:
1033  *  For blocking sockets, wait until data is available or
1034  *  until timeout ellapses.
1035  */
1036 GSocketError GSocket::Input_Timeout()
1037 {
1038   fd_set readfds;
1039
1040   if (!m_non_blocking)
1041   {
1042     FD_ZERO(&readfds);
1043     FD_SET(m_fd, &readfds);
1044     if (select(0, &readfds, NULL, NULL, &m_timeout) == 0)
1045     {
1046       m_error = GSOCK_TIMEDOUT;
1047       return GSOCK_TIMEDOUT;
1048     }
1049   }
1050   return GSOCK_NOERROR;
1051 }
1052
1053 /* _GSocket_Output_Timeout:
1054  *  For blocking sockets, wait until data can be sent without
1055  *  blocking or until timeout ellapses.
1056  */
1057 GSocketError GSocket::Output_Timeout()
1058 {
1059   fd_set writefds;
1060
1061   if (!m_non_blocking)
1062   {
1063     FD_ZERO(&writefds);
1064     FD_SET(m_fd, &writefds);
1065     if (select(0, NULL, &writefds, NULL, &m_timeout) == 0)
1066     {
1067       m_error = GSOCK_TIMEDOUT;
1068       return GSOCK_TIMEDOUT;
1069     }
1070   }
1071   return GSOCK_NOERROR;
1072 }
1073
1074 /* _GSocket_Connect_Timeout:
1075  *  For blocking sockets, wait until the connection is
1076  *  established or fails, or until timeout ellapses.
1077  */
1078 GSocketError GSocket::Connect_Timeout()
1079 {
1080   fd_set writefds;
1081   fd_set exceptfds;
1082
1083   FD_ZERO(&writefds);
1084   FD_ZERO(&exceptfds);
1085   FD_SET(m_fd, &writefds);
1086   FD_SET(m_fd, &exceptfds);
1087   if (select(0, NULL, &writefds, &exceptfds, &m_timeout) == 0)
1088   {
1089     m_error = GSOCK_TIMEDOUT;
1090     return GSOCK_TIMEDOUT;
1091   }
1092   if (!FD_ISSET(m_fd, &writefds))
1093   {
1094     m_error = GSOCK_IOERR;
1095     return GSOCK_IOERR;
1096   }
1097
1098   return GSOCK_NOERROR;
1099 }
1100
1101 int GSocket::Recv_Stream(char *buffer, int size)
1102 {
1103   return recv(m_fd, buffer, size, 0);
1104 }
1105
1106 int GSocket::Recv_Dgram(char *buffer, int size)
1107 {
1108   struct sockaddr from;
1109   SOCKLEN_T fromlen = sizeof(from);
1110   int ret;
1111   GSocketError err;
1112
1113   ret = recvfrom(m_fd, buffer, size, 0, &from, &fromlen);
1114
1115   if (ret == SOCKET_ERROR)
1116     return SOCKET_ERROR;
1117
1118   /* Translate a system address into a GSocket address */
1119   if (!m_peer)
1120   {
1121     m_peer = GAddress_new();
1122     if (!m_peer)
1123     {
1124       m_error = GSOCK_MEMERR;
1125       return -1;
1126     }
1127   }
1128   err = _GAddress_translate_from(m_peer, &from, fromlen);
1129   if (err != GSOCK_NOERROR)
1130   {
1131     GAddress_destroy(m_peer);
1132     m_peer  = NULL;
1133     m_error = err;
1134     return -1;
1135   }
1136
1137   return ret;
1138 }
1139
1140 int GSocket::Send_Stream(const char *buffer, int size)
1141 {
1142   return send(m_fd, buffer, size, 0);
1143 }
1144
1145 int GSocket::Send_Dgram(const char *buffer, int size)
1146 {
1147   struct sockaddr *addr;
1148   int len, ret;
1149   GSocketError err;
1150
1151   if (!m_peer)
1152   {
1153     m_error = GSOCK_INVADDR;
1154     return -1;
1155   }
1156
1157   err = _GAddress_translate_to(m_peer, &addr, &len);
1158   if (err != GSOCK_NOERROR)
1159   {
1160     m_error = err;
1161     return -1;
1162   }
1163
1164   ret = sendto(m_fd, buffer, size, 0, addr, len);
1165
1166   /* Frees memory allocated by _GAddress_translate_to */
1167   free(addr);
1168
1169   return ret;
1170 }
1171
1172 /* Compatibility functions for GSocket */
1173 GSocket *GSocket_new(void)
1174 {
1175     GSocket *newsocket = new GSocket();
1176     if(newsocket->IsOk())
1177         return newsocket;
1178     delete newsocket;
1179     return NULL;
1180 }
1181
1182
1183 /*
1184  * -------------------------------------------------------------------------
1185  * GAddress
1186  * -------------------------------------------------------------------------
1187  */
1188
1189 /* CHECK_ADDRESS verifies that the current address family is either
1190  * GSOCK_NOFAMILY or GSOCK_*family*, and if it is GSOCK_NOFAMILY, it
1191  * initalizes it to be a GSOCK_*family*. In other cases, it returns
1192  * an appropiate error code.
1193  *
1194  * CHECK_ADDRESS_RETVAL does the same but returning 'retval' on error.
1195  */
1196 #define CHECK_ADDRESS(address, family)                              \
1197 {                                                                   \
1198   if (address->m_family == GSOCK_NOFAMILY)                          \
1199     if (_GAddress_Init_##family(address) != GSOCK_NOERROR)          \
1200       return address->m_error;                                      \
1201   if (address->m_family != GSOCK_##family)                          \
1202   {                                                                 \
1203     address->m_error = GSOCK_INVADDR;                               \
1204     return GSOCK_INVADDR;                                           \
1205   }                                                                 \
1206 }
1207
1208 #define CHECK_ADDRESS_RETVAL(address, family, retval)               \
1209 {                                                                   \
1210   if (address->m_family == GSOCK_NOFAMILY)                          \
1211     if (_GAddress_Init_##family(address) != GSOCK_NOERROR)          \
1212       return retval;                                                \
1213   if (address->m_family != GSOCK_##family)                          \
1214   {                                                                 \
1215     address->m_error = GSOCK_INVADDR;                               \
1216     return retval;                                                  \
1217   }                                                                 \
1218 }
1219
1220
1221 GAddress *GAddress_new(void)
1222 {
1223   GAddress *address;
1224
1225   if ((address = (GAddress *) malloc(sizeof(GAddress))) == NULL)
1226     return NULL;
1227
1228   address->m_family = GSOCK_NOFAMILY;
1229   address->m_addr   = NULL;
1230   address->m_len    = 0;
1231
1232   return address;
1233 }
1234
1235 GAddress *GAddress_copy(GAddress *address)
1236 {
1237   GAddress *addr2;
1238
1239   assert(address != NULL);
1240
1241   if ((addr2 = (GAddress *) malloc(sizeof(GAddress))) == NULL)
1242     return NULL;
1243
1244   memcpy(addr2, address, sizeof(GAddress));
1245
1246   if (address->m_addr)
1247   {
1248     addr2->m_addr = (struct sockaddr *) malloc(addr2->m_len);
1249     if (addr2->m_addr == NULL)
1250     {
1251       free(addr2);
1252       return NULL;
1253     }
1254     memcpy(addr2->m_addr, address->m_addr, addr2->m_len);
1255   }
1256
1257   return addr2;
1258 }
1259
1260 void GAddress_destroy(GAddress *address)
1261 {
1262   assert(address != NULL);
1263
1264   if (address->m_addr)
1265     free(address->m_addr);
1266
1267   free(address);
1268 }
1269
1270 void GAddress_SetFamily(GAddress *address, GAddressType type)
1271 {
1272   assert(address != NULL);
1273
1274   address->m_family = type;
1275 }
1276
1277 GAddressType GAddress_GetFamily(GAddress *address)
1278 {
1279   assert(address != NULL);
1280
1281   return address->m_family;
1282 }
1283
1284 GSocketError _GAddress_translate_from(GAddress *address,
1285                                       struct sockaddr *addr, int len)
1286 {
1287   address->m_realfamily = addr->sa_family;
1288   switch (addr->sa_family)
1289   {
1290     case AF_INET:
1291       address->m_family = GSOCK_INET;
1292       break;
1293     case AF_UNIX:
1294       address->m_family = GSOCK_UNIX;
1295       break;
1296 #ifdef AF_INET6
1297     case AF_INET6:
1298       address->m_family = GSOCK_INET6;
1299       break;
1300 #endif
1301     default:
1302     {
1303       address->m_error = GSOCK_INVOP;
1304       return GSOCK_INVOP;
1305     }
1306   }
1307
1308   if (address->m_addr)
1309     free(address->m_addr);
1310
1311   address->m_len = len;
1312   address->m_addr = (struct sockaddr *) malloc(len);
1313
1314   if (address->m_addr == NULL)
1315   {
1316     address->m_error = GSOCK_MEMERR;
1317     return GSOCK_MEMERR;
1318   }
1319   memcpy(address->m_addr, addr, len);
1320
1321   return GSOCK_NOERROR;
1322 }
1323
1324 GSocketError _GAddress_translate_to(GAddress *address,
1325                                     struct sockaddr **addr, int *len)
1326 {
1327   if (!address->m_addr)
1328   {
1329     address->m_error = GSOCK_INVADDR;
1330     return GSOCK_INVADDR;
1331   }
1332
1333   *len = address->m_len;
1334   *addr = (struct sockaddr *) malloc(address->m_len);
1335   if (*addr == NULL)
1336   {
1337     address->m_error = GSOCK_MEMERR;
1338     return GSOCK_MEMERR;
1339   }
1340
1341   memcpy(*addr, address->m_addr, address->m_len);
1342   return GSOCK_NOERROR;
1343 }
1344
1345 /*
1346  * -------------------------------------------------------------------------
1347  * Internet address family
1348  * -------------------------------------------------------------------------
1349  */
1350
1351 GSocketError _GAddress_Init_INET(GAddress *address)
1352 {
1353   address->m_len  = sizeof(struct sockaddr_in);
1354   address->m_addr = (struct sockaddr *) malloc(address->m_len);
1355   if (address->m_addr == NULL)
1356   {
1357     address->m_error = GSOCK_MEMERR;
1358     return GSOCK_MEMERR;
1359   }
1360
1361   address->m_family = GSOCK_INET;
1362   address->m_realfamily = AF_INET;
1363   ((struct sockaddr_in *)address->m_addr)->sin_family = AF_INET;
1364   ((struct sockaddr_in *)address->m_addr)->sin_addr.s_addr = INADDR_ANY;
1365
1366   return GSOCK_NOERROR;
1367 }
1368
1369 GSocketError GAddress_INET_SetHostName(GAddress *address, const char *hostname)
1370 {
1371   struct hostent *he;
1372   struct in_addr *addr;
1373
1374   assert(address != NULL);
1375
1376   CHECK_ADDRESS(address, INET);
1377
1378   addr = &(((struct sockaddr_in *)address->m_addr)->sin_addr);
1379
1380   addr->s_addr = inet_addr(hostname);
1381
1382   /* If it is a numeric host name, convert it now */
1383   if (addr->s_addr == INADDR_NONE)
1384   {
1385     struct in_addr *array_addr;
1386
1387     /* It is a real name, we solve it */
1388     if ((he = gethostbyname(hostname)) == NULL)
1389     {
1390       /* addr->s_addr = INADDR_NONE just done by inet_addr() above */
1391       address->m_error = GSOCK_NOHOST;
1392       return GSOCK_NOHOST;
1393     }
1394     array_addr = (struct in_addr *) *(he->h_addr_list);
1395     addr->s_addr = array_addr[0].s_addr;
1396   }
1397   return GSOCK_NOERROR;
1398 }
1399
1400 GSocketError GAddress_INET_SetAnyAddress(GAddress *address)
1401 {
1402   return GAddress_INET_SetHostAddress(address, INADDR_ANY);
1403 }
1404
1405 GSocketError GAddress_INET_SetHostAddress(GAddress *address,
1406                                           unsigned long hostaddr)
1407 {
1408   struct in_addr *addr;
1409
1410   assert(address != NULL);
1411
1412   CHECK_ADDRESS(address, INET);
1413
1414   addr = &(((struct sockaddr_in *)address->m_addr)->sin_addr);
1415   addr->s_addr = htonl(hostaddr);;
1416
1417   return GSOCK_NOERROR;
1418 }
1419
1420 GSocketError GAddress_INET_SetPortName(GAddress *address, const char *port,
1421                                        const char *protocol)
1422 {
1423   struct servent *se;
1424   struct sockaddr_in *addr;
1425
1426   assert(address != NULL);
1427   CHECK_ADDRESS(address, INET);
1428
1429   if (!port)
1430   {
1431     address->m_error = GSOCK_INVPORT;
1432     return GSOCK_INVPORT;
1433   }
1434
1435   se = getservbyname(port, protocol);
1436   if (!se)
1437   {
1438     if (isdigit(port[0]))
1439     {
1440       int port_int;
1441
1442       port_int = atoi(port);
1443       addr = (struct sockaddr_in *)address->m_addr;
1444       addr->sin_port = htons((u_short) port_int);
1445       return GSOCK_NOERROR;
1446     }
1447
1448     address->m_error = GSOCK_INVPORT;
1449     return GSOCK_INVPORT;
1450   }
1451
1452   addr = (struct sockaddr_in *)address->m_addr;
1453   addr->sin_port = se->s_port;
1454
1455   return GSOCK_NOERROR;
1456 }
1457
1458 GSocketError GAddress_INET_SetPort(GAddress *address, unsigned short port)
1459 {
1460   struct sockaddr_in *addr;
1461
1462   assert(address != NULL);
1463   CHECK_ADDRESS(address, INET);
1464
1465   addr = (struct sockaddr_in *)address->m_addr;
1466   addr->sin_port = htons(port);
1467
1468   return GSOCK_NOERROR;
1469 }
1470
1471 GSocketError GAddress_INET_GetHostName(GAddress *address, char *hostname, size_t sbuf)
1472 {
1473   struct hostent *he;
1474   char *addr_buf;
1475   struct sockaddr_in *addr;
1476
1477   assert(address != NULL);
1478   CHECK_ADDRESS(address, INET);
1479
1480   addr = (struct sockaddr_in *)address->m_addr;
1481   addr_buf = (char *)&(addr->sin_addr);
1482
1483   he = gethostbyaddr(addr_buf, sizeof(addr->sin_addr), AF_INET);
1484   if (he == NULL)
1485   {
1486     address->m_error = GSOCK_NOHOST;
1487     return GSOCK_NOHOST;
1488   }
1489
1490   strncpy(hostname, he->h_name, sbuf);
1491
1492   return GSOCK_NOERROR;
1493 }
1494
1495 unsigned long GAddress_INET_GetHostAddress(GAddress *address)
1496 {
1497   struct sockaddr_in *addr;
1498
1499   assert(address != NULL);
1500   CHECK_ADDRESS_RETVAL(address, INET, 0);
1501
1502   addr = (struct sockaddr_in *)address->m_addr;
1503
1504   return ntohl(addr->sin_addr.s_addr);
1505 }
1506
1507 unsigned short GAddress_INET_GetPort(GAddress *address)
1508 {
1509   struct sockaddr_in *addr;
1510
1511   assert(address != NULL);
1512   CHECK_ADDRESS_RETVAL(address, INET, 0);
1513
1514   addr = (struct sockaddr_in *)address->m_addr;
1515   return ntohs(addr->sin_port);
1516 }
1517
1518 /*
1519  * -------------------------------------------------------------------------
1520  * Unix address family
1521  * -------------------------------------------------------------------------
1522  */
1523
1524 GSocketError _GAddress_Init_UNIX(GAddress *address)
1525 {
1526   assert (address != NULL);
1527   address->m_error = GSOCK_INVADDR;
1528   return GSOCK_INVADDR;
1529 }
1530
1531 GSocketError GAddress_UNIX_SetPath(GAddress *address, const char *path)
1532 {
1533 #if defined(__BORLANDC__)
1534   /* prevents unused variable message in Borland */
1535   (void)path;
1536 #endif
1537   assert (address != NULL);
1538   address->m_error = GSOCK_INVADDR;
1539   return GSOCK_INVADDR;
1540 }
1541
1542 GSocketError GAddress_UNIX_GetPath(GAddress *address, char *path, size_t sbuf)
1543 {
1544 #if defined(__BORLANDC__)
1545   /* prevents unused variable message in Borland */
1546   (void)path;
1547   (void)sbuf;
1548 #endif
1549   assert (address != NULL);
1550   address->m_error = GSOCK_INVADDR;
1551   return GSOCK_INVADDR;
1552 }
1553
1554 #else /* !wxUSE_SOCKETS */
1555
1556 /*
1557  * Translation unit shouldn't be empty, so include this typedef to make the
1558  * compiler (VC++ 6.0, for example) happy
1559  */
1560 typedef void (*wxDummy)();
1561
1562 #endif  /* wxUSE_SOCKETS || defined(__GSOCKET_STANDALONE__) */
1563