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