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