src/msw/gsocket.c

   1 /* -------------------------------------------------------------------------
   2  * Project: GSocket (Generic Socket)
   3  * Name:    gsocket.c
   4  * Author:  Guillermo Rodriguez Garcia <guille@iies.es>
   5  * Purpose: GSocket main MSW file
   6  * CVSID:   $Id$
   7  * -------------------------------------------------------------------------
   8  */
   9
  10 /*
  11  * PLEASE don't put C++ comments here - this is a C source file.
  12  */
  13
  14 #ifndef __GSOCKET_STANDALONE__
  15 #include "wx/setup.h"
  16 #endif
  17
  18 #if wxUSE_SOCKETS || defined(__GSOCKET_STANDALONE__)
  19
  20 #ifndef __GSOCKET_STANDALONE__
  21
  22 #include "wx/msw/gsockmsw.h"
  23 #include "wx/gsocket.h"
  24
  25 #define INSTANCE wxGetInstance()
  26
  27 #else
  28
  29 #include "gsockmsw.h"
  30 #include "gsocket.h"
  31
  32 /* If not using wxWindows, a global var called hInst must
  33  * be available and it must containt the app's instance
  34  * handle.
  35  */
  36 #define INSTANCE hInst
  37
  38 #endif /* __GSOCKET_STANDALONE__ */
  39
  40
  41 #include <assert.h>
  42 #include <string.h>
  43 #include <stdio.h>
  44 #include <stdlib.h>
  45 #include <stddef.h>
  46 #include <ctype.h>
  47 #include <winsock.h>
  48
  49 #define SOCKLEN_T  int
  50 #define CLASSNAME  "_GSocket_Internal_Window_Class"
  51 #define WINDOWNAME "_GSocket_Internal_Window_Name"
  52
  53 /* Maximum number of different GSocket objects at a given time.
  54  * This value can be modified at will, but it CANNOT be greater
  55  * than (0x7FFF - WM_USER + 1)
  56  */
  57 #define MAXSOCKETS 1024
  58
  59 #if (MAXSOCKETS > (0x7FFF - WM_USER + 1))
  60 #error "MAXSOCKETS is too big!"
  61 #endif
  62
  63
  64 /* Global variables */
  65
  66 extern HINSTANCE INSTANCE;
  67 static HWND hWin;
  68 static CRITICAL_SECTION critical;
  69 static GSocket* socketList[MAXSOCKETS];
  70 static int firstAvailable;
  71
  72 /* Global initializers */
  73
  74 bool GSocket_Init()
  75 {
  76   WSADATA wsaData;
  77   WNDCLASS winClass;
  78   int i;
  79
  80   /* Create internal window for event notifications */
  81   winClass.style         = 0;
  82   winClass.lpfnWndProc   = _GSocket_Internal_WinProc;
  83   winClass.cbClsExtra    = 0;
  84   winClass.cbWndExtra    = 0;
  85   winClass.hInstance     = INSTANCE;
  86   winClass.hIcon         = (HICON) NULL;
  87   winClass.hCursor       = (HCURSOR) NULL;
  88   winClass.hbrBackground = (HBRUSH) NULL;
  89   winClass.lpszMenuName  = (LPCTSTR) NULL;
  90   winClass.lpszClassName = CLASSNAME;
  91
  92   RegisterClass(&winClass);
  93   hWin = CreateWindow(CLASSNAME,
  94                       WINDOWNAME,
  95                       0, 0, 0, 0, 0,
  96                       (HWND) NULL, (HMENU) NULL, INSTANCE, (LPVOID) NULL);
  97
  98   if (!hWin) return FALSE;
  99
 100   /* Initialize socket list */
 101   InitializeCriticalSection(&critical);
 102
 103   for (i = 0; i < MAXSOCKETS; i++)
 104   {
 105     socketList[i] = NULL;
 106   }
 107   firstAvailable = 0;
 108
 109   /* Initialize WinSocket */
 110   return (WSAStartup((1 << 8) | 1, &wsaData) == 0);
 111 }
 112
 113 void GSocket_Cleanup()
 114 {
 115   /* Destroy internal window */
 116   DestroyWindow(hWin);
 117   UnregisterClass(CLASSNAME, INSTANCE);
 118
 119   /* Delete critical section */
 120   DeleteCriticalSection(&critical);
 121
 122   /* Cleanup WinSocket */
 123   WSACleanup();
 124 }
 125
 126 /* Constructors / Destructors for GSocket */
 127
 128 GSocket *GSocket_new()
 129 {
 130   int i;
 131   GSocket *socket;
 132
 133   if ((socket = (GSocket *) malloc(sizeof(GSocket))) == NULL)
 134     return NULL;
 135
 136   socket->m_fd              = INVALID_SOCKET;
 137   for (i = 0; i < GSOCK_MAX_EVENT; i++)
 138   {
 139     socket->m_cbacks[i]     = NULL;
 140   }
 141   socket->m_local           = NULL;
 142   socket->m_peer            = NULL;
 143   socket->m_error           = GSOCK_NOERROR;
 144   socket->m_server          = FALSE;
 145   socket->m_stream          = TRUE;
 146   socket->m_non_blocking    = FALSE;
 147   socket->m_timeout.tv_sec  = 10 * 60;  /* 10 minutes */
 148   socket->m_timeout.tv_usec = 0;
 149   socket->m_detected        = 0;
 150
 151   /* Allocate a new message number for this socket */
 152   EnterCriticalSection(&critical);
 153
 154   i = firstAvailable;
 155   while (socketList[i] != NULL)
 156   {
 157     i = (i + 1) % MAXSOCKETS;
 158
 159     if (i == firstAvailable)    /* abort! */
 160     {
 161       free(socket);
 162       LeaveCriticalSection(&critical);
 163       return NULL;
 164     }
 165   }
 166   socketList[i] = socket;
 167   firstAvailable = (i + 1) % MAXSOCKETS;
 168   socket->m_msgnumber = (i + WM_USER);
 169
 170   LeaveCriticalSection(&critical);
 171
 172   return socket;
 173 }
 174
 175 void GSocket_destroy(GSocket *socket)
 176 {
 177   assert(socket != NULL);
 178
 179   /* Remove the socket from the list */
 180   EnterCriticalSection(&critical);
 181   socketList[(socket->m_msgnumber - WM_USER)] = NULL;
 182   LeaveCriticalSection(&critical);
 183
 184   /* Check that the socket is really shutdowned */
 185   if (socket->m_fd != INVALID_SOCKET)
 186     GSocket_Shutdown(socket);
 187
 188   /* Destroy private addresses */
 189   if (socket->m_local)
 190     GAddress_destroy(socket->m_local);
 191
 192   if (socket->m_peer)
 193     GAddress_destroy(socket->m_peer);
 194
 195   /* Destroy the socket itself */
 196   free(socket);
 197 }
 198
 199 /* GSocket_Shutdown:
 200  *  Disallow further read/write operations on this socket, close
 201  *  the fd and disable all callbacks.
 202  */
 203 void GSocket_Shutdown(GSocket *socket)
 204 {
 205   int evt;
 206
 207   assert(socket != NULL);
 208
 209   /* If socket has been created, shutdown it */
 210   if (socket->m_fd != INVALID_SOCKET)
 211   {
 212     shutdown(socket->m_fd, 2);
 213     closesocket(socket->m_fd);
 214     socket->m_fd = INVALID_SOCKET;
 215   }
 216
 217   /* Disable GUI callbacks */
 218   for (evt = 0; evt < GSOCK_MAX_EVENT; evt++)
 219     socket->m_cbacks[evt] = NULL;
 220
 221   socket->m_detected = 0;
 222   _GSocket_Disable_Events(socket);
 223 }
 224
 225 /* Address handling */
 226
 227 /* GSocket_SetLocal:
 228  * GSocket_GetLocal:
 229  * GSocket_SetPeer:
 230  * GSocket_GetPeer:
 231  *  Set or get the local or peer address for this socket. The 'set'
 232  *  functions return GSOCK_NOERROR on success, an error code otherwise.
 233  *  The 'get' functions return a pointer to a GAddress object on success,
 234  *  or NULL otherwise, in which case they set the error code of the
 235  *  corresponding GSocket.
 236  *
 237  *  Error codes:
 238  *    GSOCK_INVSOCK - the socket is not valid.
 239  *    GSOCK_INVADDR - the address is not valid.
 240  */
 241 GSocketError GSocket_SetLocal(GSocket *socket, GAddress *address)
 242 {
 243   assert(socket != NULL);
 244
 245   /* the socket must be initialized, or it must be a server */
 246   if (socket->m_fd != INVALID_SOCKET && !socket->m_server)
 247   {
 248     socket->m_error = GSOCK_INVSOCK;
 249     return GSOCK_INVSOCK;
 250   }
 251
 252   /* check address */
 253   if (address == NULL || address->m_family == GSOCK_NOFAMILY)
 254   {
 255     socket->m_error = GSOCK_INVADDR;
 256     return GSOCK_INVADDR;
 257   }
 258
 259   if (socket->m_local)
 260     GAddress_destroy(socket->m_local);
 261
 262   socket->m_local = GAddress_copy(address);
 263
 264   return GSOCK_NOERROR;
 265 }
 266
 267 GSocketError GSocket_SetPeer(GSocket *socket, GAddress *address)
 268 {
 269   assert(socket != NULL);
 270
 271   /* check address */
 272   if (address == NULL || address->m_family == GSOCK_NOFAMILY)
 273   {
 274     socket->m_error = GSOCK_INVADDR;
 275     return GSOCK_INVADDR;
 276   }
 277
 278   if (socket->m_peer)
 279     GAddress_destroy(socket->m_peer);
 280
 281   socket->m_peer = GAddress_copy(address);
 282
 283   return GSOCK_NOERROR;
 284 }
 285
 286 GAddress *GSocket_GetLocal(GSocket *socket)
 287 {
 288   GAddress *address;
 289   struct sockaddr addr;
 290   SOCKLEN_T size = sizeof(addr);
 291   GSocketError err;
 292
 293   assert(socket != NULL);
 294
 295   /* try to get it from the m_local var first */
 296   if (socket->m_local)
 297     return GAddress_copy(socket->m_local);
 298
 299   /* else, if the socket is initialized, try getsockname */
 300   if (socket->m_fd == INVALID_SOCKET)
 301   {
 302     socket->m_error = GSOCK_INVSOCK;
 303     return NULL;
 304   }
 305
 306   if (getsockname(socket->m_fd, &addr, &size) == SOCKET_ERROR)
 307   {
 308     socket->m_error = GSOCK_IOERR;
 309     return NULL;
 310   }
 311
 312   /* got a valid address from getsockname, create a GAddress object */
 313   if ((address = GAddress_new()) == NULL)
 314   {
 315      socket->m_error = GSOCK_MEMERR;
 316      return NULL;
 317   }
 318
 319   if ((err = _GAddress_translate_from(address, &addr, size)) != GSOCK_NOERROR)
 320   {
 321      GAddress_destroy(address);
 322      socket->m_error = err;
 323      return NULL;
 324   }
 325
 326   return address;
 327 }
 328
 329 GAddress *GSocket_GetPeer(GSocket *socket)
 330 {
 331   assert(socket != NULL);
 332
 333   /* try to get it from the m_peer var */
 334   if (socket->m_peer)
 335     return GAddress_copy(socket->m_peer);
 336
 337   return NULL;
 338 }
 339
 340 /* Server specific parts */
 341
 342 /* GSocket_SetServer:
 343  *  Sets up this socket as a server. The local address must have been
 344  *  set with GSocket_SetLocal() before GSocket_SetServer() is called.
 345  *  Returns GSOCK_NOERROR on success, one of the following otherwise:
 346  *
 347  *  Error codes:
 348  *    GSOCK_INVSOCK - the socket is in use.
 349  *    GSOCK_INVADDR - the local address has not been set.
 350  *    GSOCK_IOERR   - low-level error.
 351  */
 352 GSocketError GSocket_SetServer(GSocket *sck)
 353 {
 354   u_long arg = 1;
 355
 356   assert(sck != NULL);
 357
 358   /* must not be in use */
 359   if (sck->m_fd != INVALID_SOCKET)
 360   {
 361     sck->m_error = GSOCK_INVSOCK;
 362     return GSOCK_INVSOCK;
 363   }
 364
 365   /* the local addr must have been set */
 366   if (!sck->m_local)
 367   {
 368     sck->m_error = GSOCK_INVADDR;
 369     return GSOCK_INVADDR;
 370   }
 371
 372   /* Initialize all fields */
 373   sck->m_server   = TRUE;
 374   sck->m_stream   = TRUE;
 375   sck->m_oriented = TRUE;
 376
 377   /* Create the socket */
 378   sck->m_fd = socket(sck->m_local->m_realfamily, SOCK_STREAM, 0);
 379
 380   if (sck->m_fd == INVALID_SOCKET)
 381   {
 382     sck->m_error = GSOCK_IOERR;
 383     return GSOCK_IOERR;
 384   }
 385
 386   ioctlsocket(sck->m_fd, FIONBIO, (u_long FAR *) &arg);
 387   _GSocket_Enable_Events(sck);
 388
 389   /* Bind to the local address,
 390    * retrieve the actual address bound,
 391    * and listen up to 5 connections.
 392    */
 393   if ((bind(sck->m_fd, sck->m_local->m_addr, sck->m_local->m_len) != 0) ||
 394       (getsockname(sck->m_fd,
 395                    sck->m_local->m_addr,
 396                    &sck->m_local->m_len) != 0) ||
 397       (listen(sck->m_fd, 5) != 0))
 398   {
 399     closesocket(sck->m_fd);
 400     sck->m_fd = INVALID_SOCKET;
 401     sck->m_error = GSOCK_IOERR;
 402     return GSOCK_IOERR;
 403   }
 404
 405   return GSOCK_NOERROR;
 406 }
 407
 408 /* GSocket_WaitConnection:
 409  *  Waits for an incoming client connection. Returns a pointer to
 410  *  a GSocket object, or NULL if there was an error, in which case
 411  *  the last error field will be updated for the calling GSocket.
 412  *
 413  *  Error codes (set in the calling GSocket)
 414  *    GSOCK_INVSOCK    - the socket is not valid or not a server.
 415  *    GSOCK_TIMEDOUT   - timeout, no incoming connections.
 416  *    GSOCK_WOULDBLOCK - the call would block and the socket is nonblocking.
 417  *    GSOCK_MEMERR     - couldn't allocate memory.
 418  *    GSOCK_IOERR      - low-level error.
 419  */
 420 GSocket *GSocket_WaitConnection(GSocket *sck)
 421 {
 422   GSocket *connection;
 423   struct sockaddr from;
 424   SOCKLEN_T fromlen = sizeof(from);
 425   GSocketError err;
 426   u_long arg = 1;
 427
 428   assert(sck != NULL);
 429
 430   /* Reenable CONNECTION events */
 431   sck->m_detected &= ~GSOCK_CONNECTION_FLAG;
 432
 433   /* If the socket has already been created, we exit immediately */
 434   if (sck->m_fd == INVALID_SOCKET || !sck->m_server)
 435   {
 436     sck->m_error = GSOCK_INVSOCK;
 437     return NULL;
 438   }
 439
 440   /* Create a GSocket object for the new connection */
 441   connection = GSocket_new();
 442
 443   if (!connection)
 444   {
 445     sck->m_error = GSOCK_MEMERR;
 446     return NULL;
 447   }
 448
 449   /* Wait for a connection (with timeout) */
 450   if (_GSocket_Input_Timeout(sck) == GSOCK_TIMEDOUT)
 451   {
 452     GSocket_destroy(connection);
 453     /* sck->m_error set by _GSocket_Input_Timeout */
 454     return NULL;
 455   }
 456
 457   connection->m_fd = accept(sck->m_fd, &from, &fromlen);
 458
 459   if (connection->m_fd == INVALID_SOCKET)
 460   {
 461     if (WSAGetLastError() == WSAEWOULDBLOCK)
 462       sck->m_error = GSOCK_WOULDBLOCK;
 463     else
 464       sck->m_error = GSOCK_IOERR;
 465
 466     GSocket_destroy(connection);
 467     return NULL;
 468   }
 469
 470   /* Initialize all fields */
 471   connection->m_server   = FALSE;
 472   connection->m_stream   = TRUE;
 473   connection->m_oriented = TRUE;
 474
 475   /* Setup the peer address field */
 476   connection->m_peer = GAddress_new();
 477   if (!connection->m_peer)
 478   {
 479     GSocket_destroy(connection);
 480     sck->m_error = GSOCK_MEMERR;
 481     return NULL;
 482   }
 483   err = _GAddress_translate_from(connection->m_peer, &from, fromlen);
 484   if (err != GSOCK_NOERROR)
 485   {
 486     GAddress_destroy(connection->m_peer);
 487     GSocket_destroy(connection);
 488     sck->m_error = err;
 489     return NULL;
 490   }
 491
 492   ioctlsocket(connection->m_fd, FIONBIO, (u_long FAR *) &arg);
 493   _GSocket_Enable_Events(connection);
 494
 495   return connection;
 496 }
 497
 498 /* Client specific parts */
 499
 500 /* GSocket_Connect:
 501  *  For stream (connection oriented) sockets, GSocket_Connect() tries
 502  *  to establish a client connection to a server using the peer address
 503  *  as established with GSocket_SetPeer(). Returns GSOCK_NOERROR if the
 504  *  connection has been succesfully established, or one of the error
 505  *  codes listed below. Note that for nonblocking sockets, a return
 506  *  value of GSOCK_WOULDBLOCK doesn't mean a failure. The connection
 507  *  request can be completed later; you should use GSocket_Select()
 508  *  to poll for GSOCK_CONNECTION | GSOCK_LOST, or wait for the
 509  *  corresponding asynchronous events.
 510  *
 511  *  For datagram (non connection oriented) sockets, GSocket_Connect()
 512  *  just sets the peer address established with GSocket_SetPeer() as
 513  *  default destination.
 514  *
 515  *  Error codes:
 516  *    GSOCK_INVSOCK    - the socket is in use or not valid.
 517  *    GSOCK_INVADDR    - the peer address has not been established.
 518  *    GSOCK_TIMEDOUT   - timeout, the connection failed.
 519  *    GSOCK_WOULDBLOCK - connection in progress (nonblocking sockets only)
 520  *    GSOCK_MEMERR     - couldn't allocate memory.
 521  *    GSOCK_IOERR      - low-level error.
 522  */
 523 GSocketError GSocket_Connect(GSocket *sck, GSocketStream stream)
 524 {
 525   int ret, err;
 526   u_long arg = 1;
 527
 528   assert(sck != NULL);
 529
 530   /* Enable CONNECTION events (needed for nonblocking connections) */
 531   sck->m_detected &= ~GSOCK_CONNECTION_FLAG;
 532
 533   if (sck->m_fd != INVALID_SOCKET)
 534   {
 535     sck->m_error = GSOCK_INVSOCK;
 536     return GSOCK_INVSOCK;
 537   }
 538
 539   if (!sck->m_peer)
 540   {
 541     sck->m_error = GSOCK_INVADDR;
 542     return GSOCK_INVADDR;
 543   }
 544
 545   /* Streamed or dgram socket? */
 546   sck->m_stream   = (stream == GSOCK_STREAMED);
 547   sck->m_oriented = TRUE;
 548   sck->m_server   = FALSE;
 549
 550   /* Create the socket */
 551   sck->m_fd = socket(sck->m_peer->m_realfamily,
 552                      sck->m_stream? SOCK_STREAM : SOCK_DGRAM, 0);
 553
 554   if (sck->m_fd == INVALID_SOCKET)
 555   {
 556     sck->m_error = GSOCK_IOERR;
 557     return GSOCK_IOERR;
 558   }
 559
 560   ioctlsocket(sck->m_fd, FIONBIO, (u_long FAR *) &arg);
 561   _GSocket_Enable_Events(sck);
 562
 563   /* Connect it to the peer address, with a timeout (see below) */
 564   ret = connect(sck->m_fd, sck->m_peer->m_addr, sck->m_peer->m_len);
 565
 566   if (ret == SOCKET_ERROR)
 567   {
 568     err = WSAGetLastError();
 569
 570     /* If connect failed with EWOULDBLOCK and the GSocket object
 571      * is in blocking mode, we select() for the specified timeout
 572      * checking for writability to see if the connection request
 573      * completes.
 574      */
 575     if ((err == WSAEWOULDBLOCK) && (!sck->m_non_blocking))
 576     {
 577       err = _GSocket_Connect_Timeout(sck);
 578
 579       if (err != GSOCK_NOERROR)
 580       {
 581         closesocket(sck->m_fd);
 582         sck->m_fd = INVALID_SOCKET;
 583         /* sck->m_error is set in _GSocket_Connect_Timeout */
 584       }
 585
 586       return err;
 587     }
 588
 589     /* If connect failed with EWOULDBLOCK and the GSocket object
 590      * is set to nonblocking, we set m_error to GSOCK_WOULDBLOCK
 591      * (and return GSOCK_WOULDBLOCK) but we don't close the socket;
 592      * this way if the connection completes, a GSOCK_CONNECTION
 593      * event will be generated, if enabled.
 594      */
 595     if ((err == WSAEWOULDBLOCK) && (sck->m_non_blocking))
 596     {
 597       sck->m_error = GSOCK_WOULDBLOCK;
 598       return GSOCK_WOULDBLOCK;
 599     }
 600
 601     /* If connect failed with an error other than EWOULDBLOCK,
 602      * then the call to GSocket_Connect() has failed.
 603      */
 604     closesocket(sck->m_fd);
 605     sck->m_fd = INVALID_SOCKET;
 606     sck->m_error = GSOCK_IOERR;
 607     return GSOCK_IOERR;
 608   }
 609
 610   return GSOCK_NOERROR;
 611 }
 612
 613 /* Datagram sockets */
 614
 615 /* GSocket_SetNonOriented:
 616  *  Sets up this socket as a non-connection oriented (datagram) socket.
 617  *  Before using this function, the local address must have been set
 618  *  with GSocket_SetLocal(), or the call will fail. Returns GSOCK_NOERROR
 619  *  on success, or one of the following otherwise.
 620  *
 621  *  Error codes:
 622  *    GSOCK_INVSOCK - the socket is in use.
 623  *    GSOCK_INVADDR - the local address has not been set.
 624  *    GSOCK_IOERR   - low-level error.
 625  */
 626 GSocketError GSocket_SetNonOriented(GSocket *sck)
 627 {
 628   u_long arg = 1;
 629
 630   assert(sck != NULL);
 631
 632   if (sck->m_fd != INVALID_SOCKET)
 633   {
 634     sck->m_error = GSOCK_INVSOCK;
 635     return GSOCK_INVSOCK;
 636   }
 637
 638   if (!sck->m_local)
 639   {
 640     sck->m_error = GSOCK_INVADDR;
 641     return GSOCK_INVADDR;
 642   }
 643
 644   /* Initialize all fields */
 645   sck->m_stream   = FALSE;
 646   sck->m_server   = FALSE;
 647   sck->m_oriented = FALSE;
 648
 649   /* Create the socket */
 650   sck->m_fd = socket(sck->m_local->m_realfamily, SOCK_DGRAM, 0);
 651
 652   if (sck->m_fd == INVALID_SOCKET)
 653   {
 654     sck->m_error = GSOCK_IOERR;
 655     return GSOCK_IOERR;
 656   }
 657
 658   ioctlsocket(sck->m_fd, FIONBIO, (u_long FAR *) &arg);
 659   _GSocket_Enable_Events(sck);
 660
 661   /* Bind to the local address,
 662    * and retrieve the actual address bound.
 663    */
 664   if ((bind(sck->m_fd, sck->m_local->m_addr, sck->m_local->m_len) != 0) ||
 665       (getsockname(sck->m_fd,
 666                    sck->m_local->m_addr,
 667                    &sck->m_local->m_len) != 0))
 668   {
 669     closesocket(sck->m_fd);
 670     sck->m_fd    = INVALID_SOCKET;
 671     sck->m_error = GSOCK_IOERR;
 672     return GSOCK_IOERR;
 673   }
 674
 675   return GSOCK_NOERROR;
 676 }
 677
 678
 679 /* Generic IO */
 680
 681 /* Like recv(), send(), ... */
 682 int GSocket_Read(GSocket *socket, char *buffer, int size)
 683 {
 684   int ret;
 685
 686   assert(socket != NULL);
 687
 688   /* Reenable INPUT events */
 689   socket->m_detected &= ~GSOCK_INPUT_FLAG;
 690
 691   if (socket->m_fd == INVALID_SOCKET || socket->m_server)
 692   {
 693     socket->m_error = GSOCK_INVSOCK;
 694     return -1;
 695   }
 696
 697   /* If the socket is blocking, wait for data (with a timeout) */
 698   if (_GSocket_Input_Timeout(socket) == GSOCK_TIMEDOUT)
 699     return -1;
 700
 701   /* Read the data */
 702   if (socket->m_stream)
 703     ret = _GSocket_Recv_Stream(socket, buffer, size);
 704   else
 705     ret = _GSocket_Recv_Dgram(socket, buffer, size);
 706
 707   if (ret == SOCKET_ERROR)
 708   {
 709     if (WSAGetLastError() != WSAEWOULDBLOCK)
 710       socket->m_error = GSOCK_IOERR;
 711     else
 712       socket->m_error = GSOCK_WOULDBLOCK;
 713     return -1;
 714   }
 715
 716   return ret;
 717 }
 718
 719 int GSocket_Write(GSocket *socket, const char *buffer, int size)
 720 {
 721   int ret;
 722
 723   assert(socket != NULL);
 724
 725   if (socket->m_fd == INVALID_SOCKET || socket->m_server)
 726   {
 727     socket->m_error = GSOCK_INVSOCK;
 728     return -1;
 729   }
 730
 731   /* If the socket is blocking, wait for writability (with a timeout) */
 732   if (_GSocket_Output_Timeout(socket) == GSOCK_TIMEDOUT)
 733     return -1;
 734
 735   /* Write the data */
 736   if (socket->m_stream)
 737     ret = _GSocket_Send_Stream(socket, buffer, size);
 738   else
 739     ret = _GSocket_Send_Dgram(socket, buffer, size);
 740
 741   if (ret == SOCKET_ERROR)
 742   {
 743     if (WSAGetLastError() != WSAEWOULDBLOCK)
 744       socket->m_error = GSOCK_IOERR;
 745     else
 746       socket->m_error = GSOCK_WOULDBLOCK;
 747
 748     /* Only reenable OUTPUT events after an error (just like WSAAsyncSelect
 749      * does). Once the first OUTPUT event is received, users can assume
 750      * that the socket is writable until a read operation fails. Only then
 751      * will further OUTPUT events be posted.
 752      */
 753     socket->m_detected &= ~GSOCK_OUTPUT_FLAG;
 754     return -1;
 755   }
 756
 757   return ret;
 758 }
 759
 760 /* GSocket_Select:
 761  *  Polls the socket to determine its status. This function will
 762  *  check for the events specified in the 'flags' parameter, and
 763  *  it will return a mask indicating which operations can be
 764  *  performed. This function won't block, regardless of the
 765  *  mode (blocking | nonblocking) of the socket.
 766  */
 767 GSocketEventFlags GSocket_Select(GSocket *socket, GSocketEventFlags flags)
 768 {
 769   assert(socket != NULL);
 770
 771   return (flags & socket->m_detected);
 772 }
 773
 774 /* Attributes */
 775
 776 /* GSocket_SetNonBlocking:
 777  *  Sets the socket to non-blocking mode. All IO calls will return
 778  *  immediately.
 779  */
 780 void GSocket_SetNonBlocking(GSocket *socket, bool non_block)
 781 {
 782   assert(socket != NULL);
 783
 784   socket->m_non_blocking = non_block;
 785 }
 786
 787 /* GSocket_SetTimeout:
 788  *  Sets the timeout for blocking calls. Time is expressed in
 789  *  milliseconds.
 790  */
 791 void GSocket_SetTimeout(GSocket *socket, unsigned long millis)
 792 {
 793   assert(socket != NULL);
 794
 795   socket->m_timeout.tv_sec  = (millis / 1000);
 796   socket->m_timeout.tv_usec = (millis % 1000) * 1000;
 797 }
 798
 799 /* GSocket_GetError:
 800  *  Returns the last error occured for this socket. Note that successful
 801  *  operations do not clear this back to GSOCK_NOERROR, so use it only
 802  *  after an error.
 803  */
 804 GSocketError GSocket_GetError(GSocket *socket)
 805 {
 806   assert(socket != NULL);
 807
 808   return socket->m_error;
 809 }
 810
 811
 812 /* Callbacks */
 813
 814 /* GSOCK_INPUT:
 815  *   There is data to be read in the input buffer. If, after a read
 816  *   operation, there is still data available, the callback function will
 817  *   be called again.
 818  * GSOCK_OUTPUT:
 819  *   The socket is available for writing. That is, the next write call
 820  *   won't block. This event is generated only once, when the connection is
 821  *   first established, and then only if a call failed with GSOCK_WOULDBLOCK,
 822  *   when the output buffer empties again. This means that the app should
 823  *   assume that it can write since the first OUTPUT event, and no more
 824  *   OUTPUT events will be generated unless an error occurs.
 825  * GSOCK_CONNECTION:
 826  *   Connection succesfully established, for client sockets, or incoming
 827  *   client connection, for server sockets. Wait for this event (also watch
 828  *   out for GSOCK_LOST) after you issue a nonblocking GSocket_Connect() call.
 829  * GSOCK_LOST:
 830  *   The connection is lost (or a connection request failed); this could
 831  *   be due to a failure, or due to the peer closing it gracefully.
 832  */
 833
 834 /* GSocket_SetCallback:
 835  *  Enables the callbacks specified by 'flags'. Note that 'flags'
 836  *  may be a combination of flags OR'ed toghether, so the same
 837  *  callback function can be made to accept different events.
 838  *  The callback function must have the following prototype:
 839  *
 840  *  void function(GSocket *socket, GSocketEvent event, char *cdata)
 841  */
 842 void GSocket_SetCallback(GSocket *socket, GSocketEventFlags flags,
 843                          GSocketCallback callback, char *cdata)
 844 {
 845   int count;
 846
 847   assert(socket != NULL);
 848
 849   for (count = 0; count < GSOCK_MAX_EVENT; count++)
 850   {
 851     if ((flags & (1 << count)) != 0)
 852     {
 853       socket->m_cbacks[count] = callback;
 854       socket->m_data[count] = cdata;
 855     }
 856   }
 857 }
 858
 859 /* GSocket_UnsetCallback:
 860  *  Disables all callbacks specified by 'flags', which may be a
 861  *  combination of flags OR'ed toghether.
 862  */
 863 void GSocket_UnsetCallback(GSocket *socket, GSocketEventFlags flags)
 864 {
 865   int count;
 866
 867   assert(socket != NULL);
 868
 869   for (count = 0; count < GSOCK_MAX_EVENT; count++)
 870   {
 871     if ((flags & (1 << count)) != 0)
 872     {
 873       socket->m_cbacks[count] = NULL;
 874       socket->m_data[count] = NULL;
 875     }
 876   }
 877 }
 878
 879
 880 /* Internals */
 881
 882 /* _GSocket_Enable_Events:
 883  *  Enable all event notifications; we need to be notified of all
 884  *  events for internal processing, but we will only notify users
 885  *  when an appropiate callback function has been installed.
 886  */
 887 void _GSocket_Enable_Events(GSocket *socket)
 888 {
 889   assert (socket != NULL);
 890
 891   if (socket->m_fd != INVALID_SOCKET)
 892   {
 893     WSAAsyncSelect(socket->m_fd, hWin, socket->m_msgnumber,
 894                    FD_READ | FD_WRITE | FD_ACCEPT | FD_CONNECT | FD_CLOSE);
 895   }
 896 }
 897
 898 /* _GSocket_Disable_Events:
 899  *  Disable event notifications (when shutdowning the socket)
 900  */
 901 void _GSocket_Disable_Events(GSocket *socket)
 902 {
 903   assert (socket != NULL);
 904
 905   if (socket->m_fd != INVALID_SOCKET)
 906   {
 907     WSAAsyncSelect(socket->m_fd, hWin, socket->m_msgnumber, 0);
 908   }
 909 }
 910
 911
 912 LRESULT CALLBACK _GSocket_Internal_WinProc(HWND hWnd,
 913                                            UINT uMsg,
 914                                            WPARAM wParam,
 915                                            LPARAM lParam)
 916 {
 917   GSocket *socket;
 918   GSocketEvent event;
 919   GSocketCallback cback;
 920   char *data;
 921
 922   if (uMsg >= WM_USER && uMsg <= (WM_USER + MAXSOCKETS - 1))
 923   {
 924     EnterCriticalSection(&critical);
 925     socket = socketList[(uMsg - WM_USER)];
 926     event = -1;
 927     cback = NULL;
 928     data = NULL;
 929
 930     /* Check that the socket still exists (it has not been
 931      * destroyed) and for safety, check that the m_fd field
 932      * is what we expect it to be.
 933      */
 934     if ((socket != NULL) && (socket->m_fd == wParam))
 935     {
 936       switch WSAGETSELECTEVENT(lParam)
 937       {
 938         case FD_READ:    event = GSOCK_INPUT; break;
 939         case FD_WRITE:   event = GSOCK_OUTPUT; break;
 940         case FD_ACCEPT:  event = GSOCK_CONNECTION; break;
 941         case FD_CONNECT:
 942         {
 943           if (WSAGETSELECTERROR(lParam) != 0)
 944             event = GSOCK_LOST;
 945           else
 946             event = GSOCK_CONNECTION;
 947           break;
 948         }
 949         case FD_CLOSE:   event = GSOCK_LOST; break;
 950       }
 951
 952       if (event != -1)
 953       {
 954         cback = socket->m_cbacks[event];
 955         data = socket->m_data[event];
 956
 957         if (event == GSOCK_LOST)
 958           socket->m_detected = GSOCK_LOST_FLAG;
 959         else
 960           socket->m_detected |= (1 << event);
 961       }
 962     }
 963
 964     /* OK, we can now leave the critical section because we have
 965      * already obtained the callback address (we make no further
 966      * accesses to socket->whatever). However, the app should
 967      * be prepared to handle events from a socket that has just
 968      * been closed!
 969      */
 970     LeaveCriticalSection(&critical);
 971
 972     if (cback != NULL)
 973       (cback)(socket, event, data);
 974
 975     return (LRESULT) 0;
 976   }
 977   else
 978     return DefWindowProc(hWnd, uMsg, wParam, lParam);
 979 }
 980
 981
 982 /* _GSocket_Input_Timeout:
 983  *  For blocking sockets, wait until data is available or
 984  *  until timeout ellapses.
 985  */
 986 GSocketError _GSocket_Input_Timeout(GSocket *socket)
 987 {
 988   fd_set readfds;
 989
 990   if (!socket->m_non_blocking)
 991   {
 992     FD_ZERO(&readfds);
 993     FD_SET(socket->m_fd, &readfds);
 994     if (select(0, &readfds, NULL, NULL, &socket->m_timeout) == 0)
 995     {
 996       socket->m_error = GSOCK_TIMEDOUT;
 997       return GSOCK_TIMEDOUT;
 998     }
 999   }
1000   return GSOCK_NOERROR;
1001 }
1002
1003 /* _GSocket_Output_Timeout:
1004  *  For blocking sockets, wait until data can be sent without
1005  *  blocking or until timeout ellapses.
1006  */
1007 GSocketError _GSocket_Output_Timeout(GSocket *socket)
1008 {
1009   fd_set writefds;
1010
1011   if (!socket->m_non_blocking)
1012   {
1013     FD_ZERO(&writefds);
1014     FD_SET(socket->m_fd, &writefds);
1015     if (select(0, NULL, &writefds, NULL, &socket->m_timeout) == 0)
1016     {
1017       socket->m_error = GSOCK_TIMEDOUT;
1018       return GSOCK_TIMEDOUT;
1019     }
1020   }
1021   return GSOCK_NOERROR;
1022 }
1023
1024 /* _GSocket_Connect_Timeout:
1025  *  For blocking sockets, wait until the connection is
1026  *  established or fails, or until timeout ellapses.
1027  */
1028 GSocketError _GSocket_Connect_Timeout(GSocket *socket)
1029 {
1030   fd_set writefds;
1031   fd_set exceptfds;
1032
1033   if (!socket->m_non_blocking)
1034   {
1035     FD_ZERO(&writefds);
1036     FD_ZERO(&exceptfds);
1037     FD_SET(socket->m_fd, &writefds);
1038     FD_SET(socket->m_fd, &exceptfds);
1039     if (select(0, NULL, &writefds, &exceptfds, &socket->m_timeout) == 0)
1040     {
1041       socket->m_error = GSOCK_TIMEDOUT;
1042       return GSOCK_TIMEDOUT;
1043     }
1044   }
1045   if (!FD_ISSET(socket->m_fd, &writefds))
1046   {
1047     socket->m_error = GSOCK_IOERR;
1048     return GSOCK_IOERR;
1049   }
1050
1051   return GSOCK_NOERROR;
1052 }
1053
1054 int _GSocket_Recv_Stream(GSocket *socket, char *buffer, int size)
1055 {
1056   return recv(socket->m_fd, buffer, size, 0);
1057 }
1058
1059 int _GSocket_Recv_Dgram(GSocket *socket, char *buffer, int size)
1060 {
1061   struct sockaddr from;
1062   SOCKLEN_T fromlen = sizeof(from);
1063   int ret;
1064   GSocketError err;
1065
1066   ret = recvfrom(socket->m_fd, buffer, size, 0, &from, &fromlen);
1067
1068   if (ret == SOCKET_ERROR)
1069     return SOCKET_ERROR;
1070
1071   /* Translate a system address into a GSocket address */
1072   if (!socket->m_peer)
1073   {
1074     socket->m_peer = GAddress_new();
1075     if (!socket->m_peer)
1076     {
1077       socket->m_error = GSOCK_MEMERR;
1078       return -1;
1079     }
1080   }
1081   err = _GAddress_translate_from(socket->m_peer, &from, fromlen);
1082   if (err != GSOCK_NOERROR)
1083   {
1084     GAddress_destroy(socket->m_peer);
1085     socket->m_peer  = NULL;
1086     socket->m_error = err;
1087     return -1;
1088   }
1089
1090   return ret;
1091 }
1092
1093 int _GSocket_Send_Stream(GSocket *socket, const char *buffer, int size)
1094 {
1095   return send(socket->m_fd, buffer, size, 0);
1096 }
1097
1098 int _GSocket_Send_Dgram(GSocket *socket, const char *buffer, int size)
1099 {
1100   struct sockaddr *addr;
1101   int len, ret;
1102   GSocketError err;
1103
1104   if (!socket->m_peer)
1105   {
1106     socket->m_error = GSOCK_INVADDR;
1107     return -1;
1108   }
1109
1110   err = _GAddress_translate_to(socket->m_peer, &addr, &len);
1111   if (err != GSOCK_NOERROR)
1112   {
1113     socket->m_error = err;
1114     return -1;
1115   }
1116
1117   ret = sendto(socket->m_fd, buffer, size, 0, addr, len);
1118
1119   /* Frees memory allocated by _GAddress_translate_to */
1120   free(addr);
1121
1122   return ret;
1123 }
1124
1125
1126 /*
1127  * -------------------------------------------------------------------------
1128  * GAddress
1129  * -------------------------------------------------------------------------
1130  */
1131
1132 /* CHECK_ADDRESS verifies that the current family is either GSOCK_NOFAMILY
1133  * or GSOCK_*family*, and if it is GSOCK_NOFAMILY, it initalizes address
1134  * to be a GSOCK_*family*. In other cases, it returns GSOCK_INVADDR.
1135  */
1136 #define CHECK_ADDRESS(address, family, retval)                      \
1137 {                                                                   \
1138   if (address->m_family == GSOCK_NOFAMILY)                          \
1139     if (_GAddress_Init_##family(address) != GSOCK_NOERROR)          \
1140       return address->m_error;                                      \
1141   if (address->m_family != GSOCK_##family)                          \
1142   {                                                                 \
1143     address->m_error = GSOCK_INVADDR;                               \
1144     return retval;                                                  \
1145   }                                                                 \
1146 }
1147
1148 GAddress *GAddress_new()
1149 {
1150   GAddress *address;
1151
1152   if ((address = (GAddress *) malloc(sizeof(GAddress))) == NULL)
1153     return NULL;
1154
1155   address->m_family = GSOCK_NOFAMILY;
1156   address->m_addr   = NULL;
1157   address->m_len    = 0;
1158
1159   return address;
1160 }
1161
1162 GAddress *GAddress_copy(GAddress *address)
1163 {
1164   GAddress *addr2;
1165
1166   assert(address != NULL);
1167
1168   if ((addr2 = (GAddress *) malloc(sizeof(GAddress))) == NULL)
1169     return NULL;
1170
1171   memcpy(addr2, address, sizeof(GAddress));
1172
1173   if (address->m_addr)
1174   {
1175     addr2->m_addr = (struct sockaddr *) malloc(addr2->m_len);
1176     if (addr2->m_addr == NULL)
1177     {
1178       free(addr2);
1179       return NULL;
1180     }
1181     memcpy(addr2->m_addr, address->m_addr, addr2->m_len);
1182   }
1183
1184   return addr2;
1185 }
1186
1187 void GAddress_destroy(GAddress *address)
1188 {
1189   assert(address != NULL);
1190
1191   free(address);
1192 }
1193
1194 void GAddress_SetFamily(GAddress *address, GAddressType type)
1195 {
1196   assert(address != NULL);
1197
1198   address->m_family = type;
1199 }
1200
1201 GAddressType GAddress_GetFamily(GAddress *address)
1202 {
1203   assert(address != NULL);
1204
1205   return address->m_family;
1206 }
1207
1208 GSocketError _GAddress_translate_from(GAddress *address,
1209                                       struct sockaddr *addr, int len)
1210 {
1211   address->m_realfamily = addr->sa_family;
1212   switch (addr->sa_family)
1213   {
1214     case AF_INET:
1215       address->m_family = GSOCK_INET;
1216       break;
1217     case AF_UNIX:
1218       address->m_family = GSOCK_UNIX;
1219       break;
1220 #ifdef AF_INET6
1221     case AF_INET6:
1222       address->m_family = GSOCK_INET6;
1223       break;
1224 #endif
1225     default:
1226     {
1227       address->m_error = GSOCK_INVOP;
1228       return GSOCK_INVOP;
1229     }
1230   }
1231
1232   if (address->m_addr)
1233     free(address->m_addr);
1234
1235   address->m_len = len;
1236   address->m_addr = (struct sockaddr *) malloc(len);
1237
1238   if (address->m_addr == NULL)
1239   {
1240     address->m_error = GSOCK_MEMERR;
1241     return GSOCK_MEMERR;
1242   }
1243   memcpy(address->m_addr, addr, len);
1244
1245   return GSOCK_NOERROR;
1246 }
1247
1248 GSocketError _GAddress_translate_to(GAddress *address,
1249                                     struct sockaddr **addr, int *len)
1250 {
1251   if (!address->m_addr)
1252   {
1253     address->m_error = GSOCK_INVADDR;
1254     return GSOCK_INVADDR;
1255   }
1256
1257   *len = address->m_len;
1258   *addr = (struct sockaddr *) malloc(address->m_len);
1259   if (*addr == NULL)
1260   {
1261     address->m_error = GSOCK_MEMERR;
1262     return GSOCK_MEMERR;
1263   }
1264
1265   memcpy(*addr, address->m_addr, address->m_len);
1266   return GSOCK_NOERROR;
1267 }
1268
1269 /*
1270  * -------------------------------------------------------------------------
1271  * Internet address family
1272  * -------------------------------------------------------------------------
1273  */
1274
1275 GSocketError _GAddress_Init_INET(GAddress *address)
1276 {
1277   address->m_len  = sizeof(struct sockaddr_in);
1278   address->m_addr = (struct sockaddr *) malloc(address->m_len);
1279   if (address->m_addr == NULL)
1280   {
1281     address->m_error = GSOCK_MEMERR;
1282     return GSOCK_MEMERR;
1283   }
1284
1285   address->m_family = GSOCK_INET;
1286   address->m_realfamily = PF_INET;
1287   ((struct sockaddr_in *)address->m_addr)->sin_family = AF_INET;
1288   ((struct sockaddr_in *)address->m_addr)->sin_addr.s_addr = INADDR_ANY;
1289
1290   return GSOCK_NOERROR;
1291 }
1292
1293 GSocketError GAddress_INET_SetHostName(GAddress *address, const char *hostname)
1294 {
1295   struct hostent *he;
1296   struct in_addr *addr;
1297
1298   assert(address != NULL);
1299
1300   CHECK_ADDRESS(address, INET, GSOCK_INVADDR);
1301
1302   addr = &(((struct sockaddr_in *)address->m_addr)->sin_addr);
1303
1304   addr->s_addr = inet_addr(hostname);
1305
1306   /* If it is a numeric host name, convert it now */
1307   if (addr->s_addr == INADDR_NONE)
1308   {
1309     struct in_addr *array_addr;
1310
1311     /* It is a real name, we solve it */
1312     if ((he = gethostbyname(hostname)) == NULL)
1313     {
1314       /* addr->s_addr = INADDR_NONE just done by inet_addr() above */
1315       address->m_error = GSOCK_NOHOST;
1316       return GSOCK_NOHOST;
1317     }
1318     array_addr = (struct in_addr *) *(he->h_addr_list);
1319     addr->s_addr = array_addr[0].s_addr;
1320   }
1321   return GSOCK_NOERROR;
1322 }
1323
1324 GSocketError GAddress_INET_SetAnyAddress(GAddress *address)
1325 {
1326   return GAddress_INET_SetHostAddress(address, INADDR_ANY);
1327 }
1328
1329 GSocketError GAddress_INET_SetHostAddress(GAddress *address,
1330                                           unsigned long hostaddr)
1331 {
1332   struct in_addr *addr;
1333
1334   assert(address != NULL);
1335
1336   CHECK_ADDRESS(address, INET, GSOCK_INVADDR);
1337
1338   addr = &(((struct sockaddr_in *)address->m_addr)->sin_addr);
1339   addr->s_addr = hostaddr;
1340
1341   return GSOCK_NOERROR;
1342 }
1343
1344 GSocketError GAddress_INET_SetPortName(GAddress *address, const char *port,
1345                                        const char *protocol)
1346 {
1347   struct servent *se;
1348   struct sockaddr_in *addr;
1349
1350   assert(address != NULL);
1351   CHECK_ADDRESS(address, INET, GSOCK_INVADDR);
1352
1353   if (!port)
1354   {
1355     address->m_error = GSOCK_INVPORT;
1356     return GSOCK_INVPORT;
1357   }
1358
1359   se = getservbyname(port, protocol);
1360   if (!se)
1361   {
1362     if (isdigit(port[0]))
1363     {
1364       int port_int;
1365
1366       port_int = atoi(port);
1367       addr = (struct sockaddr_in *)address->m_addr;
1368       addr->sin_port = htons((u_short) port_int);
1369       return GSOCK_NOERROR;
1370     }
1371
1372     address->m_error = GSOCK_INVPORT;
1373     return GSOCK_INVPORT;
1374   }
1375
1376   addr = (struct sockaddr_in *)address->m_addr;
1377   addr->sin_port = se->s_port;
1378
1379   return GSOCK_NOERROR;
1380 }
1381
1382 GSocketError GAddress_INET_SetPort(GAddress *address, unsigned short port)
1383 {
1384   struct sockaddr_in *addr;
1385
1386   assert(address != NULL);
1387   CHECK_ADDRESS(address, INET, GSOCK_INVADDR);
1388
1389   addr = (struct sockaddr_in *)address->m_addr;
1390   addr->sin_port = htons(port);
1391
1392   return GSOCK_NOERROR;
1393 }
1394
1395 GSocketError GAddress_INET_GetHostName(GAddress *address, char *hostname, size_t sbuf)
1396 {
1397   struct hostent *he;
1398   char *addr_buf;
1399   struct sockaddr_in *addr;
1400
1401   assert(address != NULL);
1402   CHECK_ADDRESS(address, INET, GSOCK_INVADDR);
1403
1404   addr = (struct sockaddr_in *)address->m_addr;
1405   addr_buf = (char *)&(addr->sin_addr);
1406
1407   he = gethostbyaddr(addr_buf, sizeof(addr->sin_addr), AF_INET);
1408   if (he == NULL)
1409   {
1410     address->m_error = GSOCK_NOHOST;
1411     return GSOCK_NOHOST;
1412   }
1413
1414   strncpy(hostname, he->h_name, sbuf);
1415
1416   return GSOCK_NOERROR;
1417 }
1418
1419 unsigned long GAddress_INET_GetHostAddress(GAddress *address)
1420 {
1421   struct sockaddr_in *addr;
1422
1423   assert(address != NULL);
1424   CHECK_ADDRESS(address, INET, 0);
1425
1426   addr = (struct sockaddr_in *)address->m_addr;
1427
1428   return addr->sin_addr.s_addr;
1429 }
1430
1431 unsigned short GAddress_INET_GetPort(GAddress *address)
1432 {
1433   struct sockaddr_in *addr;
1434
1435   assert(address != NULL);
1436   CHECK_ADDRESS(address, INET, 0);
1437
1438   addr = (struct sockaddr_in *)address->m_addr;
1439   return ntohs(addr->sin_port);
1440 }
1441
1442 /*
1443  * -------------------------------------------------------------------------
1444  * Unix address family
1445  * -------------------------------------------------------------------------
1446  */
1447
1448 GSocketError _GAddress_Init_UNIX(GAddress *address)
1449 {
1450   assert (address != NULL);
1451   address->m_error = GSOCK_INVADDR;
1452   return GSOCK_INVADDR;
1453 }
1454
1455 GSocketError GAddress_UNIX_SetPath(GAddress *address, const char *path)
1456 {
1457   assert (address != NULL);
1458   address->m_error = GSOCK_INVADDR;
1459   return GSOCK_INVADDR;
1460 }
1461
1462 GSocketError GAddress_UNIX_GetPath(GAddress *address, char *path, size_t sbuf)
1463 {
1464   assert (address != NULL);
1465   address->m_error = GSOCK_INVADDR;
1466   return GSOCK_INVADDR;
1467 }
1468
1469 #else /* !wxUSE_SOCKETS */
1470
1471 /*
1472  * Translation unit shouldn't be empty, so include this typedef to make the
1473  * compiler (VC++ 6.0, for example) happy
1474  */
1475 typedef (*wxDummy)();
1476
1477 #endif  /* wxUSE_SOCKETS || defined(__GSOCKET_STANDALONE__) */