src/os2/gsocket.c

   1 /* -------------------------------------------------------------------------
   2  * Project: GSocket (Generic Socket) for WX
   3  * Name:    gsocket.c
   4  * Authors: Guilhem Lavaux,
   5  *          Guillermo Rodriguez Garcia <guille@iies.es> (maintainer)
   6  * Purpose: GSocket main Unix-style file
   7  * CVSID:   $Id$
   8  * -------------------------------------------------------------------------
   9  */
  10
  11 /*
  12  * PLEASE don't put C++ comments here - this is a C source file.
  13  */
  14
  15 #ifndef __GSOCKET_STANDALONE__
  16 #include "wx/setup.h"
  17 #endif
  18
  19 #ifndef __EMX__
  20 /* I don't see, why this include is needed, but it seems to be necessary
  21    sometimes. For EMX, including C++ headers into plain C source breaks
  22    compilation, so don't do it there.                                   */
  23 #include "wx/defs.h"
  24 #endif
  25
  26 #if wxUSE_SOCKETS || defined(__GSOCKET_STANDALONE__)
  27
  28 #define BSD_SELECT /* use Berkley Sockets select */
  29
  30 #include <assert.h>
  31 #include <sys/types.h>
  32
  33 #ifdef __EMX__
  34 #include <sys/time.h>
  35 #include <netinet/in.h>
  36 #include <arpa/inet.h>
  37 #include <netdb.h>
  38 #include <errno.h>
  39 #include <unistd.h>
  40 #include <sys/un.h>
  41 #define HAVE_INET_ADDR
  42
  43 #else
  44
  45 #include <string.h>
  46
  47 #include <sys/time.h>
  48 #include <types.h>
  49 #include <netinet/in.h>
  50 #include <netdb.h>
  51 #include <nerrno.h>
  52
  53 #endif
  54
  55 #if defined(__VISAGECPP__) && __IBMCPP__ < 400
  56
  57 #include <machine/endian.h>
  58 #include <socket.h>
  59 #include <ioctl.h>
  60 #include <select.h>
  61 #include <unistd.h>
  62
  63 #define EBADF   SOCEBADF
  64
  65 #else
  66
  67 #include <sys/socket.h>
  68 #include <sys/ioctl.h>
  69 #include <sys/select.h>
  70
  71 #ifdef __EMX__
  72 #define soclose(a) close(a)
  73 #else
  74 #define select(a,b,c,d,e) bsdselect(a,b,c,d,e)
  75 int _System bsdselect(int,
  76                       struct fd_set *,
  77                       struct fd_set *,
  78                       struct fd_set *,
  79                       struct timeval *);
  80 int _System soclose(int);
  81 #endif
  82 #endif
  83
  84 #include <stdio.h>
  85 #if (defined(__VISAGECPP__) && __IBMCPP__ < 400) || defined(__EMX__)
  86 #  ifdef min
  87 #  undef min
  88 #  endif
  89 #  include <stdlib.h>
  90 #endif
  91 #include <stddef.h>
  92 #include <ctype.h>
  93 #include <stdlib.h>
  94
  95 #include <signal.h>
  96
  97 #ifndef SOCKLEN_T
  98
  99 #ifdef __GLIBC__
 100 #      if __GLIBC__ == 2
 101 #         define SOCKLEN_T socklen_t
 102 #      endif
 103 #else
 104 #      define SOCKLEN_T int
 105 #endif
 106
 107 #endif
 108
 109 /*
 110  * MSW defines this, Unices don't.
 111  */
 112 #ifndef INVALID_SOCKET
 113 #define INVALID_SOCKET -1
 114 #endif
 115
 116 /*
 117  * INADDR_BROADCAST is identical to INADDR_NONE which is not defined
 118  * on all systems. INADDR_BROADCAST should be fine to indicate an error.
 119  */
 120 #ifndef INADDR_NONE
 121 #define INADDR_NONE INADDR_BROADCAST
 122 #endif
 123
 124 #define MASK_SIGNAL()                       \
 125 {                                           \
 126   void (*old_handler)(int);                 \
 127                                             \
 128   old_handler = signal(SIGPIPE, SIG_IGN);
 129
 130 #define UNMASK_SIGNAL()                     \
 131   signal(SIGPIPE, old_handler);             \
 132 }
 133
 134 #ifndef __GSOCKET_STANDALONE__
 135 #  include "wx/unix/gsockunx.h"
 136 #  include "wx/gsocket.h"
 137 #else
 138 #  include "gsockunx.h"
 139 #  include "gsocket.h"
 140 #endif /* __GSOCKET_STANDALONE__ */
 141
 142 /* redefine some GUI-only functions to do nothing in console mode */
 143 #if defined(wxUSE_GUI) && !wxUSE_GUI
 144 #  define _GSocket_GUI_Init(socket) (1)
 145 #  define _GSocket_GUI_Destroy(socket)
 146 #  define _GSocket_Enable_Events(socket)
 147 #  define _GSocket_Disable_Events(socket)
 148 #  define _GSocket_Install_Callback(socket, event)
 149 #  define _GSocket_Uninstall_Callback(socket, event)
 150 #endif /* wxUSE_GUI */
 151
 152 /* debugging helpers */
 153 #define  __GSOCKET_DEBUG__
 154 #ifdef __GSOCKET_DEBUG__
 155 #  define GSocket_Debug(args) printf args
 156 #else
 157 #  define GSocket_Debug(args)
 158 #endif /* __GSOCKET_DEBUG__ */
 159
 160 /* Global initialisers */
 161
 162 int GSocket_Init(void)
 163 {
 164   return 1;
 165 }
 166
 167 void GSocket_Cleanup(void)
 168 {
 169 }
 170
 171 /* Constructors / Destructors for GSocket */
 172
 173 GSocket *GSocket_new(void)
 174 {
 175   int i, success;
 176   GSocket *socket;
 177
 178   socket = (GSocket *)malloc(sizeof(GSocket));
 179
 180   if (socket == NULL)
 181     return NULL;
 182
 183   socket->m_fd                  = INVALID_SOCKET;
 184   for (i=0;i<GSOCK_MAX_EVENT;i++)
 185   {
 186     socket->m_cbacks[i]         = NULL;
 187   }
 188   socket->m_detected            = 0;
 189   socket->m_local               = NULL;
 190   socket->m_peer                = NULL;
 191   socket->m_error               = GSOCK_NOERROR;
 192   socket->m_server              = FALSE;
 193   socket->m_stream              = TRUE;
 194   socket->m_gui_dependent       = NULL;
 195   socket->m_non_blocking        = FALSE;
 196   socket->m_timeout             = 10*60*1000;
 197                                 /* 10 minutes * 60 sec * 1000 millisec */
 198   socket->m_establishing        = FALSE;
 199
 200   /* Per-socket GUI-specific initialization */
 201   success = _GSocket_GUI_Init(socket);
 202   if (!success)
 203   {
 204     free(socket);
 205     return NULL;
 206   }
 207
 208   return socket;
 209 }
 210
 211 void GSocket_destroy(GSocket *socket)
 212 {
 213   assert(socket != NULL);
 214
 215   /* Check that the socket is really shutdowned */
 216   if (socket->m_fd != INVALID_SOCKET)
 217     GSocket_Shutdown(socket);
 218
 219   /* Per-socket GUI-specific cleanup */
 220   _GSocket_GUI_Destroy(socket);
 221
 222   /* Destroy private addresses */
 223   if (socket->m_local)
 224     GAddress_destroy(socket->m_local);
 225
 226   if (socket->m_peer)
 227     GAddress_destroy(socket->m_peer);
 228
 229   /* Destroy the socket itself */
 230   free(socket);
 231 }
 232
 233 /* GSocket_Shutdown:
 234  *  Disallow further read/write operations on this socket, close
 235  *  the fd and disable all callbacks.
 236  */
 237 void GSocket_Shutdown(GSocket *socket)
 238 {
 239   int evt;
 240
 241   assert(socket != NULL);
 242
 243   /* If socket has been created, shutdown it */
 244   if (socket->m_fd != INVALID_SOCKET)
 245   {
 246     shutdown(socket->m_fd, 2);
 247     soclose(socket->m_fd);
 248     socket->m_fd = INVALID_SOCKET;
 249   }
 250
 251   /* Disable GUI callbacks */
 252   for (evt = 0; evt < GSOCK_MAX_EVENT; evt++)
 253     socket->m_cbacks[evt] = NULL;
 254
 255   socket->m_detected = GSOCK_LOST_FLAG;
 256   _GSocket_Disable_Events(socket);
 257 }
 258
 259 /* Address handling */
 260
 261 /* GSocket_SetLocal:
 262  * GSocket_GetLocal:
 263  * GSocket_SetPeer:
 264  * GSocket_GetPeer:
 265  *  Set or get the local or peer address for this socket. The 'set'
 266  *  functions return GSOCK_NOERROR on success, an error code otherwise.
 267  *  The 'get' functions return a pointer to a GAddress object on success,
 268  *  or NULL otherwise, in which case they set the error code of the
 269  *  corresponding GSocket.
 270  *
 271  *  Error codes:
 272  *    GSOCK_INVSOCK - the socket is not valid.
 273  *    GSOCK_INVADDR - the address is not valid.
 274  */
 275 GSocketError GSocket_SetLocal(GSocket *socket, GAddress *address)
 276 {
 277   assert(socket != NULL);
 278
 279   /* the socket must be initialized, or it must be a server */
 280   if ((socket->m_fd != INVALID_SOCKET && !socket->m_server))
 281   {
 282     socket->m_error = GSOCK_INVSOCK;
 283     return GSOCK_INVSOCK;
 284   }
 285
 286   /* check address */
 287   if (address == NULL || address->m_family == GSOCK_NOFAMILY)
 288   {
 289     socket->m_error = GSOCK_INVADDR;
 290     return GSOCK_INVADDR;
 291   }
 292
 293   if (socket->m_local)
 294     GAddress_destroy(socket->m_local);
 295
 296   socket->m_local = GAddress_copy(address);
 297
 298   return GSOCK_NOERROR;
 299 }
 300
 301 GSocketError GSocket_SetPeer(GSocket *socket, GAddress *address)
 302 {
 303   assert(socket != NULL);
 304
 305   /* check address */
 306   if (address == NULL || address->m_family == GSOCK_NOFAMILY)
 307   {
 308     socket->m_error = GSOCK_INVADDR;
 309     return GSOCK_INVADDR;
 310   }
 311
 312   if (socket->m_peer)
 313     GAddress_destroy(socket->m_peer);
 314
 315   socket->m_peer = GAddress_copy(address);
 316
 317   return GSOCK_NOERROR;
 318 }
 319
 320 GAddress *GSocket_GetLocal(GSocket *socket)
 321 {
 322   GAddress *address;
 323   struct sockaddr addr;
 324   SOCKLEN_T size = sizeof(addr);
 325   GSocketError err;
 326
 327   assert(socket != NULL);
 328
 329   /* try to get it from the m_local var first */
 330   if (socket->m_local)
 331     return GAddress_copy(socket->m_local);
 332
 333   /* else, if the socket is initialized, try getsockname */
 334   if (socket->m_fd == INVALID_SOCKET)
 335   {
 336     socket->m_error = GSOCK_INVSOCK;
 337     return NULL;
 338   }
 339
 340   if (getsockname(socket->m_fd, &addr, (SOCKLEN_T *) &size) < 0)
 341   {
 342     socket->m_error = GSOCK_IOERR;
 343     return NULL;
 344   }
 345
 346   /* got a valid address from getsockname, create a GAddress object */
 347   address = GAddress_new();
 348   if (address == NULL)
 349   {
 350     socket->m_error = GSOCK_MEMERR;
 351     return NULL;
 352   }
 353
 354   err = _GAddress_translate_from(address, &addr, size);
 355   if (err != GSOCK_NOERROR)
 356   {
 357     GAddress_destroy(address);
 358     socket->m_error = err;
 359     return NULL;
 360   }
 361
 362   return address;
 363 }
 364
 365 GAddress *GSocket_GetPeer(GSocket *socket)
 366 {
 367   assert(socket != NULL);
 368
 369   /* try to get it from the m_peer var */
 370   if (socket->m_peer)
 371     return GAddress_copy(socket->m_peer);
 372
 373   return NULL;
 374 }
 375
 376 /* Server specific parts */
 377
 378 /* GSocket_SetServer:
 379  *  Sets up this socket as a server. The local address must have been
 380  *  set with GSocket_SetLocal() before GSocket_SetServer() is called.
 381  *  Returns GSOCK_NOERROR on success, one of the following otherwise:
 382  *
 383  *  Error codes:
 384  *    GSOCK_INVSOCK - the socket is in use.
 385  *    GSOCK_INVADDR - the local address has not been set.
 386  *    GSOCK_IOERR   - low-level error.
 387  */
 388 GSocketError GSocket_SetServer(GSocket *sck)
 389 {
 390   int arg = 1;
 391
 392   assert(sck != NULL);
 393
 394   /* must not be in use */
 395   if (sck->m_fd != INVALID_SOCKET)
 396   {
 397     sck->m_error = GSOCK_INVSOCK;
 398     return GSOCK_INVSOCK;
 399   }
 400
 401   /* the local addr must have been set */
 402   if (!sck->m_local)
 403   {
 404     sck->m_error = GSOCK_INVADDR;
 405     return GSOCK_INVADDR;
 406   }
 407
 408   /* Initialize all fields */
 409   sck->m_stream   = TRUE;
 410   sck->m_server   = TRUE;
 411   sck->m_oriented = TRUE;
 412
 413   /* Create the socket */
 414   sck->m_fd = socket(sck->m_local->m_realfamily, SOCK_STREAM, 0);
 415
 416   if (sck->m_fd == INVALID_SOCKET)
 417   {
 418     sck->m_error = GSOCK_IOERR;
 419     return GSOCK_IOERR;
 420   }
 421
 422   ioctl(sck->m_fd, FIONBIO, (char*)&arg, sizeof(arg));
 423   _GSocket_Enable_Events(sck);
 424
 425   /* Bind to the local address,
 426    * retrieve the actual address bound,
 427    * and listen up to 5 connections.
 428    */
 429   if ((bind(sck->m_fd, sck->m_local->m_addr, sck->m_local->m_len) != 0) ||
 430       (getsockname(sck->m_fd,
 431                    sck->m_local->m_addr,
 432                    (SOCKLEN_T *) &sck->m_local->m_len) != 0) ||
 433       (listen(sck->m_fd, 5) != 0))
 434   {
 435     soclose(sck->m_fd);
 436     sck->m_fd = INVALID_SOCKET;
 437     sck->m_error = GSOCK_IOERR;
 438     return GSOCK_IOERR;
 439   }
 440
 441   return GSOCK_NOERROR;
 442 }
 443
 444 /* GSocket_WaitConnection:
 445  *  Waits for an incoming client connection. Returns a pointer to
 446  *  a GSocket object, or NULL if there was an error, in which case
 447  *  the last error field will be updated for the calling GSocket.
 448  *
 449  *  Error codes (set in the calling GSocket)
 450  *    GSOCK_INVSOCK    - the socket is not valid or not a server.
 451  *    GSOCK_TIMEDOUT   - timeout, no incoming connections.
 452  *    GSOCK_WOULDBLOCK - the call would block and the socket is nonblocking.
 453  *    GSOCK_MEMERR     - couldn't allocate memory.
 454  *    GSOCK_IOERR      - low-level error.
 455  */
 456 GSocket *GSocket_WaitConnection(GSocket *socket)
 457 {
 458   struct sockaddr from;
 459   SOCKLEN_T fromlen = sizeof(from);
 460   GSocket *connection;
 461   GSocketError err;
 462   int arg = 1;
 463
 464   assert(socket != NULL);
 465
 466   /* Reenable CONNECTION events */
 467   _GSocket_Enable(socket, GSOCK_CONNECTION);
 468
 469   /* If the socket has already been created, we exit immediately */
 470   if (socket->m_fd == INVALID_SOCKET || !socket->m_server)
 471   {
 472     socket->m_error = GSOCK_INVSOCK;
 473     return NULL;
 474   }
 475
 476   /* Create a GSocket object for the new connection */
 477   connection = GSocket_new();
 478
 479   if (!connection)
 480   {
 481     socket->m_error = GSOCK_MEMERR;
 482     return NULL;
 483   }
 484
 485   /* Wait for a connection (with timeout) */
 486   if (_GSocket_Input_Timeout(socket) == GSOCK_TIMEDOUT)
 487   {
 488     GSocket_destroy(connection);
 489     /* socket->m_error set by _GSocket_Input_Timeout */
 490     return NULL;
 491   }
 492
 493   connection->m_fd = accept(socket->m_fd, &from, (SOCKLEN_T *) &fromlen);
 494
 495   if (connection->m_fd == INVALID_SOCKET)
 496   {
 497     if (errno == EWOULDBLOCK)
 498       socket->m_error = GSOCK_WOULDBLOCK;
 499     else
 500       socket->m_error = GSOCK_IOERR;
 501
 502     GSocket_destroy(connection);
 503     return NULL;
 504   }
 505
 506   /* Initialize all fields */
 507   connection->m_server   = FALSE;
 508   connection->m_stream   = TRUE;
 509   connection->m_oriented = TRUE;
 510
 511   /* Setup the peer address field */
 512   connection->m_peer = GAddress_new();
 513   if (!connection->m_peer)
 514   {
 515     GSocket_destroy(connection);
 516     socket->m_error = GSOCK_MEMERR;
 517     return NULL;
 518   }
 519   err = _GAddress_translate_from(connection->m_peer, &from, fromlen);
 520   if (err != GSOCK_NOERROR)
 521   {
 522     GAddress_destroy(connection->m_peer);
 523     GSocket_destroy(connection);
 524     socket->m_error = err;
 525     return NULL;
 526   }
 527
 528   ioctl(connection->m_fd, FIONBIO, (char*)&arg, sizeof(arg));
 529   _GSocket_Enable_Events(connection);
 530
 531   return connection;
 532 }
 533
 534 /* Client specific parts */
 535
 536 /* GSocket_Connect:
 537  *  For stream (connection oriented) sockets, GSocket_Connect() tries
 538  *  to establish a client connection to a server using the peer address
 539  *  as established with GSocket_SetPeer(). Returns GSOCK_NOERROR if the
 540  *  connection has been succesfully established, or one of the error
 541  *  codes listed below. Note that for nonblocking sockets, a return
 542  *  value of GSOCK_WOULDBLOCK doesn't mean a failure. The connection
 543  *  request can be completed later; you should use GSocket_Select()
 544  *  to poll for GSOCK_CONNECTION | GSOCK_LOST, or wait for the
 545  *  corresponding asynchronous events.
 546  *
 547  *  For datagram (non connection oriented) sockets, GSocket_Connect()
 548  *  just sets the peer address established with GSocket_SetPeer() as
 549  *  default destination.
 550  *
 551  *  Error codes:
 552  *    GSOCK_INVSOCK    - the socket is in use or not valid.
 553  *    GSOCK_INVADDR    - the peer address has not been established.
 554  *    GSOCK_TIMEDOUT   - timeout, the connection failed.
 555  *    GSOCK_WOULDBLOCK - connection in progress (nonblocking sockets only)
 556  *    GSOCK_MEMERR     - couldn't allocate memory.
 557  *    GSOCK_IOERR      - low-level error.
 558  */
 559 GSocketError GSocket_Connect(GSocket *sck, GSocketStream stream)
 560 {
 561   int err, ret;
 562   int arg = 1;
 563
 564   assert(sck != NULL);
 565
 566   /* Enable CONNECTION events (needed for nonblocking connections) */
 567   _GSocket_Enable(sck, GSOCK_CONNECTION);
 568
 569   if (sck->m_fd != INVALID_SOCKET)
 570   {
 571     sck->m_error = GSOCK_INVSOCK;
 572     return GSOCK_INVSOCK;
 573   }
 574
 575   if (!sck->m_peer)
 576   {
 577     sck->m_error = GSOCK_INVADDR;
 578     return GSOCK_INVADDR;
 579   }
 580
 581   /* Streamed or dgram socket? */
 582   sck->m_stream   = (stream == GSOCK_STREAMED);
 583   sck->m_oriented = TRUE;
 584   sck->m_server   = FALSE;
 585   sck->m_establishing = FALSE;
 586
 587   /* Create the socket */
 588   sck->m_fd = socket(sck->m_peer->m_realfamily,
 589                      sck->m_stream? SOCK_STREAM : SOCK_DGRAM, 0);
 590
 591   if (sck->m_fd == INVALID_SOCKET)
 592   {
 593     sck->m_error = GSOCK_IOERR;
 594     return GSOCK_IOERR;
 595   }
 596
 597   ioctl(sck->m_fd, FIONBIO, (char*)&arg, sizeof(arg));
 598   _GSocket_Enable_Events(sck);
 599
 600   /* Connect it to the peer address, with a timeout (see below) */
 601   ret = connect(sck->m_fd, sck->m_peer->m_addr, sck->m_peer->m_len);
 602
 603   printf("connect on %d to %X (%d) returned %d, errno = %d\n",
 604      sck->m_fd, sck->m_peer->m_addr, sck->m_peer->m_len, ret, errno);
 605   if (ret == -1)
 606   {
 607     err = errno;
 608
 609     /* If connect failed with EINPROGRESS and the GSocket object
 610      * is in blocking mode, we select() for the specified timeout
 611      * checking for writability to see if the connection request
 612      * completes.
 613      */
 614     if ((err == EINPROGRESS) && (!sck->m_non_blocking))
 615     {
 616       if (_GSocket_Output_Timeout(sck) == GSOCK_TIMEDOUT)
 617       {
 618         soclose(sck->m_fd);
 619         sck->m_fd = INVALID_SOCKET;
 620         /* sck->m_error is set in _GSocket_Output_Timeout */
 621         return GSOCK_TIMEDOUT;
 622       }
 623       else
 624       {
 625         int error;
 626         SOCKLEN_T len = sizeof(error);
 627
 628         getsockopt(sck->m_fd, SOL_SOCKET, SO_ERROR, (void*) &error, &len);
 629
 630         if (!error)
 631           return GSOCK_NOERROR;
 632       }
 633     }
 634
 635     /* If connect failed with EINPROGRESS and the GSocket object
 636      * is set to nonblocking, we set m_error to GSOCK_WOULDBLOCK
 637      * (and return GSOCK_WOULDBLOCK) but we don't close the socket;
 638      * this way if the connection completes, a GSOCK_CONNECTION
 639      * event will be generated, if enabled.
 640      */
 641     if ((err == EINPROGRESS) && (sck->m_non_blocking))
 642     {
 643       sck->m_establishing = TRUE;
 644       sck->m_error = GSOCK_WOULDBLOCK;
 645       return GSOCK_WOULDBLOCK;
 646     }
 647
 648     /* If connect failed with an error other than EINPROGRESS,
 649      * then the call to GSocket_Connect has failed.
 650      */
 651     soclose(sck->m_fd);
 652     sck->m_fd = INVALID_SOCKET;
 653     sck->m_error = GSOCK_IOERR;
 654     return GSOCK_IOERR;
 655   }
 656
 657   return GSOCK_NOERROR;
 658 }
 659
 660 /* Datagram sockets */
 661
 662 /* GSocket_SetNonOriented:
 663  *  Sets up this socket as a non-connection oriented (datagram) socket.
 664  *  Before using this function, the local address must have been set
 665  *  with GSocket_SetLocal(), or the call will fail. Returns GSOCK_NOERROR
 666  *  on success, or one of the following otherwise.
 667  *
 668  *  Error codes:
 669  *    GSOCK_INVSOCK - the socket is in use.
 670  *    GSOCK_INVADDR - the local address has not been set.
 671  *    GSOCK_IOERR   - low-level error.
 672  */
 673 GSocketError GSocket_SetNonOriented(GSocket *sck)
 674 {
 675   int arg = 1;
 676
 677   assert(sck != NULL);
 678
 679   if (sck->m_fd != INVALID_SOCKET)
 680   {
 681     sck->m_error = GSOCK_INVSOCK;
 682     return GSOCK_INVSOCK;
 683   }
 684
 685   if (!sck->m_local)
 686   {
 687     sck->m_error = GSOCK_INVADDR;
 688     return GSOCK_INVADDR;
 689   }
 690
 691   /* Initialize all fields */
 692   sck->m_stream   = FALSE;
 693   sck->m_server   = FALSE;
 694   sck->m_oriented = FALSE;
 695
 696   /* Create the socket */
 697   sck->m_fd = socket(sck->m_local->m_realfamily, SOCK_DGRAM, 0);
 698
 699   if (sck->m_fd == INVALID_SOCKET)
 700   {
 701     sck->m_error = GSOCK_IOERR;
 702     return GSOCK_IOERR;
 703   }
 704
 705   ioctl(sck->m_fd, FIONBIO, (char*)&arg, sizeof(arg));
 706   _GSocket_Enable_Events(sck);
 707
 708   /* Bind to the local address,
 709    * and retrieve the actual address bound.
 710    */
 711   if ((bind(sck->m_fd, sck->m_local->m_addr, sck->m_local->m_len) != 0) ||
 712       (getsockname(sck->m_fd,
 713                    sck->m_local->m_addr,
 714                    (SOCKLEN_T *) &sck->m_local->m_len) != 0))
 715   {
 716     soclose(sck->m_fd);
 717     sck->m_fd    = INVALID_SOCKET;
 718     sck->m_error = GSOCK_IOERR;
 719     return GSOCK_IOERR;
 720   }
 721
 722   return GSOCK_NOERROR;
 723 }
 724
 725 /* Generic IO */
 726
 727 /* Like recv(), send(), ... */
 728 int GSocket_Read(GSocket *socket, char *buffer, int size)
 729 {
 730   int ret;
 731
 732   assert(socket != NULL);
 733
 734   /* Reenable INPUT events */
 735   _GSocket_Enable(socket, GSOCK_INPUT);
 736
 737   if (socket->m_fd == INVALID_SOCKET || socket->m_server)
 738   {
 739     socket->m_error = GSOCK_INVSOCK;
 740     return -1;
 741   }
 742
 743   /* If the socket is blocking, wait for data (with a timeout) */
 744   if (_GSocket_Input_Timeout(socket) == GSOCK_TIMEDOUT)
 745     return -1;
 746
 747   /* Read the data */
 748   if (socket->m_stream)
 749     ret = _GSocket_Recv_Stream(socket, buffer, size);
 750   else
 751     ret = _GSocket_Recv_Dgram(socket, buffer, size);
 752
 753   if (ret == -1)
 754   {
 755     if (errno == EWOULDBLOCK)
 756       socket->m_error = GSOCK_WOULDBLOCK;
 757     else
 758       socket->m_error = GSOCK_IOERR;
 759   }
 760
 761   return ret;
 762 }
 763
 764 int GSocket_Write(GSocket *socket, const char *buffer, int size)
 765 {
 766   int ret;
 767
 768   assert(socket != NULL);
 769
 770   GSocket_Debug(( "GSocket_Write #1, size %d\n", size ));
 771
 772   if (socket->m_fd == INVALID_SOCKET || socket->m_server)
 773   {
 774     socket->m_error = GSOCK_INVSOCK;
 775     return -1;
 776   }
 777
 778   GSocket_Debug(( "GSocket_Write #2, size %d\n", size ));
 779
 780   /* If the socket is blocking, wait for writability (with a timeout) */
 781   if (_GSocket_Output_Timeout(socket) == GSOCK_TIMEDOUT)
 782     return -1;
 783
 784   GSocket_Debug(( "GSocket_Write #3, size %d\n", size ));
 785
 786   /* Write the data */
 787   if (socket->m_stream)
 788     ret = _GSocket_Send_Stream(socket, buffer, size);
 789   else
 790     ret = _GSocket_Send_Dgram(socket, buffer, size);
 791
 792   GSocket_Debug(( "GSocket_Write #4, size %d\n", size ));
 793
 794   if (ret == -1)
 795   {
 796     if (errno == EWOULDBLOCK)
 797     {
 798       socket->m_error = GSOCK_WOULDBLOCK;
 799       GSocket_Debug(( "GSocket_Write error WOULDBLOCK\n" ));
 800     }
 801     else
 802     {
 803       socket->m_error = GSOCK_IOERR;
 804       GSocket_Debug(( "GSocket_Write error IOERR\n" ));
 805     }
 806
 807     /* Only reenable OUTPUT events after an error (just like WSAAsyncSelect
 808      * in MSW). Once the first OUTPUT event is received, users can assume
 809      * that the socket is writable until a read operation fails. Only then
 810      * will further OUTPUT events be posted.
 811      */
 812     _GSocket_Enable(socket, GSOCK_OUTPUT);
 813     return -1;
 814   }
 815
 816   GSocket_Debug(( "GSocket_Write #5, size %d ret %d\n", size, ret ));
 817
 818   return ret;
 819 }
 820
 821 /* GSocket_Select:
 822  *  Polls the socket to determine its status. This function will
 823  *  check for the events specified in the 'flags' parameter, and
 824  *  it will return a mask indicating which operations can be
 825  *  performed. This function won't block, regardless of the
 826  *  mode (blocking | nonblocking) of the socket.
 827  */
 828 GSocketEventFlags GSocket_Select(GSocket *socket, GSocketEventFlags flags)
 829 {
 830 #if defined(wxUSE_GUI) && !wxUSE_GUI
 831
 832   GSocketEventFlags result = 0;
 833   fd_set readfds;
 834   fd_set writefds;
 835   fd_set exceptfds;
 836   struct timeval tv;
 837
 838   /* Do not use a static struct, Linux can garble it */
 839   tv.tv_sec = 0;
 840   tv.tv_usec = 0;
 841
 842   assert(socket != NULL);
 843
 844   FD_ZERO(&readfds);
 845   FD_ZERO(&writefds);
 846   FD_ZERO(&exceptfds);
 847   FD_SET(socket->m_fd, &readfds);
 848   FD_SET(socket->m_fd, &writefds);
 849   FD_SET(socket->m_fd, &exceptfds);
 850
 851   /* Check known state first */
 852   result |= (GSOCK_CONNECTION_FLAG & socket->m_detected & flags);
 853   result |= (GSOCK_LOST_FLAG       & socket->m_detected & flags);
 854
 855   /* Try select now */
 856   if (select(socket->m_fd + 1, &readfds, &writefds, &exceptfds, &tv) <= 0)
 857     return result;
 858
 859   /* Check for readability */
 860   if (FD_ISSET(socket->m_fd, &readfds))
 861   {
 862     char c;
 863
 864     if (recv(socket->m_fd, &c, 1, MSG_PEEK) > 0)
 865     {
 866       result |= (GSOCK_INPUT_FLAG & flags);
 867     }
 868     else
 869     {
 870       if (socket->m_server && socket->m_stream)
 871       {
 872         result |= (GSOCK_CONNECTION_FLAG & flags);
 873         socket->m_detected |= GSOCK_CONNECTION_FLAG;
 874       }
 875       else
 876       {
 877         result |= (GSOCK_LOST_FLAG & flags);
 878         socket->m_detected = GSOCK_LOST_FLAG;
 879       }
 880     }
 881   }
 882
 883   /* Check for writability */
 884   if (FD_ISSET(socket->m_fd, &writefds))
 885   {
 886     if (socket->m_establishing && !socket->m_server)
 887     {
 888       int error;
 889       SOCKLEN_T len = sizeof(error);
 890
 891       socket->m_establishing = FALSE;
 892
 893       getsockopt(socket->m_fd, SOL_SOCKET, SO_ERROR, (void*)&error, &len);
 894
 895       if (error)
 896       {
 897         result |= (GSOCK_LOST_FLAG & flags);
 898         socket->m_detected = GSOCK_LOST_FLAG;
 899       }
 900       else
 901       {
 902         result |= (GSOCK_CONNECTION_FLAG & flags);
 903         socket->m_detected |= GSOCK_CONNECTION_FLAG;
 904       }
 905     }
 906     else
 907     {
 908       result |= (GSOCK_OUTPUT_FLAG & flags);
 909     }
 910   }
 911
 912   /* Check for exceptions and errors (is this useful in Unices?) */
 913   if (FD_ISSET(socket->m_fd, &exceptfds))
 914   {
 915     result |= (GSOCK_LOST_FLAG & flags);
 916     socket->m_establishing = FALSE;
 917     socket->m_detected = GSOCK_LOST_FLAG;
 918   }
 919
 920   return result;
 921
 922 #else
 923
 924   assert(socket != NULL);
 925   return flags & socket->m_detected;
 926
 927 #endif /* !wxUSE_GUI */
 928 }
 929
 930 /* Flags */
 931
 932 /* GSocket_SetNonBlocking:
 933  *  Sets the socket to non-blocking mode. All IO calls will return
 934  *  immediately.
 935  */
 936 void GSocket_SetNonBlocking(GSocket *socket, int non_block)
 937 {
 938   assert(socket != NULL);
 939
 940   GSocket_Debug( ("GSocket_SetNonBlocking: %d\n", (int)non_block) );
 941
 942   socket->m_non_blocking = non_block;
 943 }
 944
 945 /* GSocket_SetTimeout:
 946  *  Sets the timeout for blocking calls. Time is expressed in
 947  *  milliseconds.
 948  */
 949 void GSocket_SetTimeout(GSocket *socket, unsigned long millisec)
 950 {
 951   assert(socket != NULL);
 952
 953   socket->m_timeout = millisec;
 954 }
 955
 956 /* GSocket_GetError:
 957  *  Returns the last error occured for this socket. Note that successful
 958  *  operations do not clear this back to GSOCK_NOERROR, so use it only
 959  *  after an error.
 960  */
 961 GSocketError GSocket_GetError(GSocket *socket)
 962 {
 963   assert(socket != NULL);
 964
 965   return socket->m_error;
 966 }
 967
 968 /* Callbacks */
 969
 970 /* GSOCK_INPUT:
 971  *   There is data to be read in the input buffer. If, after a read
 972  *   operation, there is still data available, the callback function will
 973  *   be called again.
 974  * GSOCK_OUTPUT:
 975  *   The socket is available for writing. That is, the next write call
 976  *   won't block. This event is generated only once, when the connection is
 977  *   first established, and then only if a call failed with GSOCK_WOULDBLOCK,
 978  *   when the output buffer empties again. This means that the app should
 979  *   assume that it can write since the first OUTPUT event, and no more
 980  *   OUTPUT events will be generated unless an error occurs.
 981  * GSOCK_CONNECTION:
 982  *   Connection succesfully established, for client sockets, or incoming
 983  *   client connection, for server sockets. Wait for this event (also watch
 984  *   out for GSOCK_LOST) after you issue a nonblocking GSocket_Connect() call.
 985  * GSOCK_LOST:
 986  *   The connection is lost (or a connection request failed); this could
 987  *   be due to a failure, or due to the peer closing it gracefully.
 988  */
 989
 990 /* GSocket_SetCallback:
 991  *  Enables the callbacks specified by 'flags'. Note that 'flags'
 992  *  may be a combination of flags OR'ed toghether, so the same
 993  *  callback function can be made to accept different events.
 994  *  The callback function must have the following prototype:
 995  *
 996  *  void function(GSocket *socket, GSocketEvent event, char *cdata)
 997  */
 998 void GSocket_SetCallback(GSocket *socket, GSocketEventFlags flags,
 999                          GSocketCallback callback, char *cdata)
1000 {
1001   int count;
1002
1003   assert(socket != NULL);
1004
1005   for (count = 0; count < GSOCK_MAX_EVENT; count++)
1006   {
1007     if ((flags & (1 << count)) != 0)
1008     {
1009       printf("Setting callback no %d for socket at %X to address %X,data %X\n",
1010          count, socket, callback, cdata);
1011       socket->m_cbacks[count] = callback;
1012       socket->m_data[count] = cdata;
1013     }
1014   }
1015 }
1016
1017 /* GSocket_UnsetCallback:
1018  *  Disables all callbacks specified by 'flags', which may be a
1019  *  combination of flags OR'ed toghether.
1020  */
1021 void GSocket_UnsetCallback(GSocket *socket, GSocketEventFlags flags)
1022 {
1023   int count;
1024
1025   assert(socket != NULL);
1026
1027   for (count = 0; count < GSOCK_MAX_EVENT; count++)
1028   {
1029     if ((flags & (1 << count)) != 0)
1030     {
1031       printf("Removing callback no %d for socket at %X",
1032          count, socket);
1033       socket->m_cbacks[count] = NULL;
1034       socket->m_data[count] = NULL;
1035     }
1036   }
1037 }
1038
1039
1040 #define CALL_CALLBACK(socket, event) {                                  \
1041   _GSocket_Disable(socket, event);                                      \
1042   if (socket->m_cbacks[event]){                                         \
1043     printf("Call callback for event %d, socket %X: %X, %X\n", event,    \
1044             socket, socket->m_cbacks[event], socket->m_data[event]);    \
1045     socket->m_cbacks[event](socket, event, socket->m_data[event]);      \
1046   }                                                                     \
1047 }
1048
1049
1050 void _GSocket_Enable(GSocket *socket, GSocketEvent event)
1051 {
1052   socket->m_detected &= ~(1 << event);
1053   _GSocket_Install_Callback(socket, event);
1054 }
1055
1056 void _GSocket_Disable(GSocket *socket, GSocketEvent event)
1057 {
1058   socket->m_detected |= (1 << event);
1059   _GSocket_Uninstall_Callback(socket, event);
1060 }
1061
1062 /* _GSocket_Input_Timeout:
1063  *  For blocking sockets, wait until data is available or
1064  *  until timeout ellapses.
1065  */
1066 GSocketError _GSocket_Input_Timeout(GSocket *socket)
1067 {
1068   struct timeval tv;
1069   fd_set readfds;
1070   int ret;
1071
1072   /* Linux select() will overwrite the struct on return */
1073   tv.tv_sec  = (socket->m_timeout / 1000);
1074   tv.tv_usec = (socket->m_timeout % 1000) * 1000;
1075
1076   if (!socket->m_non_blocking)
1077   {
1078     FD_ZERO(&readfds);
1079     FD_SET(socket->m_fd, &readfds);
1080     ret = select(socket->m_fd + 1, &readfds, NULL, NULL, &tv);
1081     if (ret == 0)
1082     {
1083       GSocket_Debug(( "GSocket_Input_Timeout, select returned 0\n" ));
1084       socket->m_error = GSOCK_TIMEDOUT;
1085       return GSOCK_TIMEDOUT;
1086     }
1087     if (ret == -1)
1088     {
1089       GSocket_Debug(( "GSocket_Input_Timeout, select returned -1\n" ));
1090       if (errno == EBADF) GSocket_Debug(( "Invalid file descriptor\n" ));
1091       if (errno == EINTR) GSocket_Debug(( "A non blocked signal was caught\n" ));
1092       if (errno == EINVAL) GSocket_Debug(( "The highest number descriptor is negative\n" ));
1093       if (errno == ENOMEM) GSocket_Debug(( "Not enough memory\n" ));
1094       socket->m_error = GSOCK_TIMEDOUT;
1095       return GSOCK_TIMEDOUT;
1096     }
1097   }
1098   return GSOCK_NOERROR;
1099 }
1100
1101 /* _GSocket_Output_Timeout:
1102  *  For blocking sockets, wait until data can be sent without
1103  *  blocking or until timeout ellapses.
1104  */
1105 GSocketError _GSocket_Output_Timeout(GSocket *socket)
1106 {
1107   struct timeval tv;
1108   fd_set writefds;
1109   int ret;
1110
1111   /* Linux select() will overwrite the struct on return */
1112   tv.tv_sec  = (socket->m_timeout / 1000);
1113   tv.tv_usec = (socket->m_timeout % 1000) * 1000;
1114
1115   GSocket_Debug( ("m_non_blocking has: %d\n", (int)socket->m_non_blocking) );
1116
1117   if (!socket->m_non_blocking)
1118   {
1119     FD_ZERO(&writefds);
1120     FD_SET(socket->m_fd, &writefds);
1121     ret = select(socket->m_fd + 1, NULL, &writefds, NULL, &tv);
1122     if (ret == 0)
1123     {
1124       GSocket_Debug(( "GSocket_Output_Timeout, select returned 0\n" ));
1125       socket->m_error = GSOCK_TIMEDOUT;
1126       return GSOCK_TIMEDOUT;
1127     }
1128     if (ret == -1)
1129     {
1130       GSocket_Debug(( "GSocket_Output_Timeout, select returned -1\n" ));
1131       if (errno == EBADF) GSocket_Debug(( "Invalid file descriptor\n" ));
1132       if (errno == EINTR) GSocket_Debug(( "A non blocked signal was caught\n" ));
1133       if (errno == EINVAL) GSocket_Debug(( "The highest number descriptor is negative\n" ));
1134       if (errno == ENOMEM) GSocket_Debug(( "Not enough memory\n" ));
1135       socket->m_error = GSOCK_TIMEDOUT;
1136       return GSOCK_TIMEDOUT;
1137     }
1138     if ( ! FD_ISSET(socket->m_fd, &writefds) )
1139       GSocket_Debug(( "GSocket_Output_Timeout is buggy!\n" ));
1140     else
1141       GSocket_Debug(( "GSocket_Output_Timeout seems correct\n" ));
1142   }
1143   else
1144   {
1145     GSocket_Debug(( "GSocket_Output_Timeout, didn't try select!\n" ));
1146   }
1147
1148   return GSOCK_NOERROR;
1149 }
1150
1151 int _GSocket_Recv_Stream(GSocket *socket, char *buffer, int size)
1152 {
1153   return recv(socket->m_fd, buffer, size, 0);
1154 }
1155
1156 int _GSocket_Recv_Dgram(GSocket *socket, char *buffer, int size)
1157 {
1158   struct sockaddr from;
1159   SOCKLEN_T fromlen = sizeof(from);
1160   int ret;
1161   GSocketError err;
1162
1163   fromlen = sizeof(from);
1164
1165   ret = recvfrom(socket->m_fd, buffer, size, 0, &from, (SOCKLEN_T *) &fromlen);
1166
1167   if (ret == -1)
1168     return -1;
1169
1170   /* Translate a system address into a GSocket address */
1171   if (!socket->m_peer)
1172   {
1173     socket->m_peer = GAddress_new();
1174     if (!socket->m_peer)
1175     {
1176       socket->m_error = GSOCK_MEMERR;
1177       return -1;
1178     }
1179   }
1180   err = _GAddress_translate_from(socket->m_peer, &from, fromlen);
1181   if (err != GSOCK_NOERROR)
1182   {
1183     GAddress_destroy(socket->m_peer);
1184     socket->m_peer  = NULL;
1185     socket->m_error = err;
1186     return -1;
1187   }
1188
1189   return ret;
1190 }
1191
1192 int _GSocket_Send_Stream(GSocket *socket, const char *buffer, int size)
1193 {
1194   int ret;
1195
1196 #ifdef __EMX__
1197   MASK_SIGNAL();
1198   ret = send(socket->m_fd, buffer, size, 0);
1199   UNMASK_SIGNAL();
1200 #else
1201   ret = send(socket->m_fd, (char *)buffer, size, 0);
1202 #endif
1203   return ret;
1204 }
1205
1206 int _GSocket_Send_Dgram(GSocket *socket, const char *buffer, int size)
1207 {
1208   struct sockaddr *addr;
1209   int len, ret;
1210   GSocketError err;
1211
1212   if (!socket->m_peer)
1213   {
1214     socket->m_error = GSOCK_INVADDR;
1215     return -1;
1216   }
1217
1218   err = _GAddress_translate_to(socket->m_peer, &addr, &len);
1219   if (err != GSOCK_NOERROR)
1220   {
1221     socket->m_error = err;
1222     return -1;
1223   }
1224
1225 #ifdef __EMX__
1226   MASK_SIGNAL();
1227   ret = sendto(socket->m_fd, buffer, size, 0, addr, len);
1228   UNMASK_SIGNAL();
1229 #else
1230   ret = sendto(socket->m_fd, (char *)buffer, size, 0, addr, len);
1231 #endif
1232
1233   /* Frees memory allocated from _GAddress_translate_to */
1234   free(addr);
1235
1236   return ret;
1237 }
1238
1239 void _GSocket_Detected_Read(GSocket *socket)
1240 {
1241   char c;
1242
1243   if (recv(socket->m_fd, &c, 1, MSG_PEEK) > 0)
1244   {
1245     CALL_CALLBACK(socket, GSOCK_INPUT);
1246   }
1247   else
1248   {
1249     if (socket->m_server && socket->m_stream)
1250     {
1251       CALL_CALLBACK(socket, GSOCK_CONNECTION);
1252     }
1253     else
1254     {
1255       CALL_CALLBACK(socket, GSOCK_LOST);
1256     }
1257   }
1258 }
1259
1260 void _GSocket_Detected_Write(GSocket *socket)
1261 {
1262   if (socket->m_establishing && !socket->m_server)
1263   {
1264     int error;
1265     SOCKLEN_T len = sizeof(error);
1266
1267     socket->m_establishing = FALSE;
1268
1269     getsockopt(socket->m_fd, SOL_SOCKET, SO_ERROR, (void*)&error, &len);
1270
1271     if (error)
1272     {
1273       CALL_CALLBACK(socket, GSOCK_LOST);
1274     }
1275     else
1276     {
1277       CALL_CALLBACK(socket, GSOCK_CONNECTION);
1278       /* We have to fire this event by hand because CONNECTION (for clients)
1279        * and OUTPUT are internally the same and we just disabled CONNECTION
1280        * events with the above macro.
1281        */
1282       CALL_CALLBACK(socket, GSOCK_OUTPUT);
1283     }
1284   }
1285   else
1286   {
1287     CALL_CALLBACK(socket, GSOCK_OUTPUT);
1288   }
1289 }
1290
1291 /*
1292  * -------------------------------------------------------------------------
1293  * GAddress
1294  * -------------------------------------------------------------------------
1295  */
1296
1297 /* CHECK_ADDRESS verifies that the current address family is either
1298  * GSOCK_NOFAMILY or GSOCK_*family*, and if it is GSOCK_NOFAMILY, it
1299  * initalizes it to be a GSOCK_*family*. In other cases, it returns
1300  * an appropiate error code.
1301  *
1302  * CHECK_ADDRESS_RETVAL does the same but returning 'retval' on error.
1303  */
1304 #define CHECK_ADDRESS(address, family)                              \
1305 {                                                                   \
1306   if (address->m_family == GSOCK_NOFAMILY)                          \
1307     if (_GAddress_Init_##family(address) != GSOCK_NOERROR)          \
1308       return address->m_error;                                      \
1309   if (address->m_family != GSOCK_##family)                          \
1310   {                                                                 \
1311     address->m_error = GSOCK_INVADDR;                               \
1312     return GSOCK_INVADDR;                                           \
1313   }                                                                 \
1314 }
1315
1316 #define CHECK_ADDRESS_RETVAL(address, family, retval)               \
1317 {                                                                   \
1318   if (address->m_family == GSOCK_NOFAMILY)                          \
1319     if (_GAddress_Init_##family(address) != GSOCK_NOERROR)          \
1320       return retval;                                                \
1321   if (address->m_family != GSOCK_##family)                          \
1322   {                                                                 \
1323     address->m_error = GSOCK_INVADDR;                               \
1324     return retval;                                                  \
1325   }                                                                 \
1326 }
1327
1328
1329 GAddress *GAddress_new(void)
1330 {
1331   GAddress *address;
1332
1333   if ((address = (GAddress *) malloc(sizeof(GAddress))) == NULL)
1334     return NULL;
1335
1336   address->m_family  = GSOCK_NOFAMILY;
1337   address->m_addr    = NULL;
1338   address->m_len     = 0;
1339
1340   return address;
1341 }
1342
1343 GAddress *GAddress_copy(GAddress *address)
1344 {
1345   GAddress *addr2;
1346
1347   assert(address != NULL);
1348
1349   if ((addr2 = (GAddress *) malloc(sizeof(GAddress))) == NULL)
1350     return NULL;
1351
1352   memcpy(addr2, address, sizeof(GAddress));
1353
1354   if (address->m_addr)
1355   {
1356     addr2->m_addr = (struct sockaddr *)malloc(addr2->m_len);
1357     if (addr2->m_addr == NULL)
1358     {
1359       free(addr2);
1360       return NULL;
1361     }
1362     memcpy(addr2->m_addr, address->m_addr, addr2->m_len);
1363   }
1364
1365   return addr2;
1366 }
1367
1368 void GAddress_destroy(GAddress *address)
1369 {
1370   assert(address != NULL);
1371
1372   if (address->m_addr)
1373     free(address->m_addr);
1374
1375 /*    free(address); */
1376 }
1377
1378 void GAddress_SetFamily(GAddress *address, GAddressType type)
1379 {
1380   assert(address != NULL);
1381
1382   address->m_family = type;
1383 }
1384
1385 GAddressType GAddress_GetFamily(GAddress *address)
1386 {
1387   assert(address != NULL);
1388
1389   return address->m_family;
1390 }
1391
1392 GSocketError _GAddress_translate_from(GAddress *address,
1393                                       struct sockaddr *addr, int len)
1394 {
1395   address->m_realfamily = addr->sa_family;
1396   switch (addr->sa_family)
1397   {
1398     case AF_INET:
1399       address->m_family = GSOCK_INET;
1400       break;
1401     case AF_UNIX:
1402       address->m_family = GSOCK_UNIX;
1403       break;
1404 #ifdef AF_INET6
1405     case AF_INET6:
1406       address->m_family = GSOCK_INET6;
1407       break;
1408 #endif
1409     default:
1410     {
1411       address->m_error = GSOCK_INVOP;
1412       return GSOCK_INVOP;
1413     }
1414   }
1415
1416   if (address->m_addr)
1417     free(address->m_addr);
1418
1419   address->m_len  = len;
1420   address->m_addr = (struct sockaddr *)malloc(len);
1421
1422   if (address->m_addr == NULL)
1423   {
1424     address->m_error = GSOCK_MEMERR;
1425     return GSOCK_MEMERR;
1426   }
1427   memcpy(address->m_addr, addr, len);
1428
1429   return GSOCK_NOERROR;
1430 }
1431
1432 GSocketError _GAddress_translate_to(GAddress *address,
1433                                     struct sockaddr **addr, int *len)
1434 {
1435   if (!address->m_addr)
1436   {
1437     address->m_error = GSOCK_INVADDR;
1438     return GSOCK_INVADDR;
1439   }
1440
1441   *len = address->m_len;
1442   *addr = (struct sockaddr *)malloc(address->m_len);
1443   if (*addr == NULL)
1444   {
1445     address->m_error = GSOCK_MEMERR;
1446     return GSOCK_MEMERR;
1447   }
1448
1449   memcpy(*addr, address->m_addr, address->m_len);
1450   return GSOCK_NOERROR;
1451 }
1452
1453 /*
1454  * -------------------------------------------------------------------------
1455  * Internet address family
1456  * -------------------------------------------------------------------------
1457  */
1458
1459 GSocketError _GAddress_Init_INET(GAddress *address)
1460 {
1461   address->m_len  = sizeof(struct sockaddr_in);
1462   address->m_addr = (struct sockaddr *) malloc(address->m_len);
1463   if (address->m_addr == NULL)
1464   {
1465     address->m_error = GSOCK_MEMERR;
1466     return GSOCK_MEMERR;
1467   }
1468
1469   address->m_family = GSOCK_INET;
1470   address->m_realfamily = PF_INET;
1471   ((struct sockaddr_in *)address->m_addr)->sin_family = AF_INET;
1472   ((struct sockaddr_in *)address->m_addr)->sin_addr.s_addr = INADDR_ANY;
1473
1474   return GSOCK_NOERROR;
1475 }
1476
1477 GSocketError GAddress_INET_SetHostName(GAddress *address, const char *hostname)
1478 {
1479   struct hostent *he;
1480   struct in_addr *addr;
1481
1482   assert(address != NULL);
1483
1484   CHECK_ADDRESS(address, INET);
1485
1486   addr = &(((struct sockaddr_in *)address->m_addr)->sin_addr);
1487
1488   /* If it is a numeric host name, convert it now */
1489 #if defined(HAVE_INET_ATON)
1490   if (inet_aton(hostname, addr) == 0)
1491   {
1492 #elif defined(HAVE_INET_ADDR)
1493   addr->s_addr = inet_addr(hostname);
1494   if ( (addr->s_addr == -1 )
1495   {
1496 #else
1497   /* Use gethostbyname by default */
1498 //  int val = 1;  //VA doesn't like constants in conditional expressions at all
1499   if (1)
1500   {
1501 #endif
1502     struct in_addr *array_addr;
1503
1504     /* It is a real name, we solve it */
1505     if ((he = gethostbyname(hostname)) == NULL)
1506     {
1507       /* Reset to invalid address */
1508       addr->s_addr = INADDR_NONE;
1509       address->m_error = GSOCK_NOHOST;
1510       return GSOCK_NOHOST;
1511     }
1512     array_addr = (struct in_addr *) *(he->h_addr_list);
1513     addr->s_addr = array_addr[0].s_addr;
1514   }
1515   return GSOCK_NOERROR;
1516 }
1517
1518 GSocketError GAddress_INET_SetAnyAddress(GAddress *address)
1519 {
1520   return GAddress_INET_SetHostAddress(address, INADDR_ANY);
1521 }
1522
1523 GSocketError GAddress_INET_SetHostAddress(GAddress *address,
1524                                           unsigned long hostaddr)
1525 {
1526   struct in_addr *addr;
1527
1528   assert(address != NULL);
1529
1530   CHECK_ADDRESS(address, INET);
1531
1532   addr = &(((struct sockaddr_in *)address->m_addr)->sin_addr);
1533   addr->s_addr = hostaddr;
1534
1535   return GSOCK_NOERROR;
1536 }
1537
1538 GSocketError GAddress_INET_SetPortName(GAddress *address, const char *port,
1539                                        const char *protocol)
1540 {
1541   struct servent *se;
1542   struct sockaddr_in *addr;
1543
1544   assert(address != NULL);
1545   CHECK_ADDRESS(address, INET);
1546
1547   if (!port)
1548   {
1549     address->m_error = GSOCK_INVPORT;
1550     return GSOCK_INVPORT;
1551   }
1552
1553   se = getservbyname(port, protocol);
1554   if (!se)
1555   {
1556     if (isdigit((int)port[0]))
1557     {
1558       int port_int;
1559
1560       port_int = atoi(port);
1561       addr = (struct sockaddr_in *)address->m_addr;
1562       addr->sin_port = htons(port_int);
1563       return GSOCK_NOERROR;
1564     }
1565
1566     address->m_error = GSOCK_INVPORT;
1567     return GSOCK_INVPORT;
1568   }
1569
1570   addr = (struct sockaddr_in *)address->m_addr;
1571   addr->sin_port = se->s_port;
1572
1573   return GSOCK_NOERROR;
1574 }
1575
1576 GSocketError GAddress_INET_SetPort(GAddress *address, unsigned short port)
1577 {
1578   struct sockaddr_in *addr;
1579
1580   assert(address != NULL);
1581   CHECK_ADDRESS(address, INET);
1582
1583   addr = (struct sockaddr_in *)address->m_addr;
1584   addr->sin_port = htons(port);
1585
1586   return GSOCK_NOERROR;
1587 }
1588
1589 GSocketError GAddress_INET_GetHostName(GAddress *address, char *hostname, size_t sbuf)
1590 {
1591   struct hostent *he;
1592   char *addr_buf;
1593   struct sockaddr_in *addr;
1594
1595   assert(address != NULL);
1596   CHECK_ADDRESS(address, INET);
1597
1598   addr = (struct sockaddr_in *)address->m_addr;
1599   addr_buf = (char *)&(addr->sin_addr);
1600
1601   he = gethostbyaddr(addr_buf, sizeof(addr->sin_addr), AF_INET);
1602   if (he == NULL)
1603   {
1604     address->m_error = GSOCK_NOHOST;
1605     return GSOCK_NOHOST;
1606   }
1607
1608   strncpy(hostname, he->h_name, sbuf);
1609
1610   return GSOCK_NOERROR;
1611 }
1612
1613 unsigned long GAddress_INET_GetHostAddress(GAddress *address)
1614 {
1615   struct sockaddr_in *addr;
1616
1617   assert(address != NULL);
1618   CHECK_ADDRESS_RETVAL(address, INET, 0);
1619
1620   addr = (struct sockaddr_in *)address->m_addr;
1621
1622   return addr->sin_addr.s_addr;
1623 }
1624
1625 unsigned short GAddress_INET_GetPort(GAddress *address)
1626 {
1627   struct sockaddr_in *addr;
1628
1629   assert(address != NULL);
1630   CHECK_ADDRESS_RETVAL(address, INET, 0);
1631
1632   addr = (struct sockaddr_in *)address->m_addr;
1633   return ntohs(addr->sin_port);
1634 }
1635
1636 /*
1637  * -------------------------------------------------------------------------
1638  * Unix address family
1639  * -------------------------------------------------------------------------
1640  */
1641
1642 #ifdef __EMX__
1643 GSocketError _GAddress_Init_UNIX(GAddress *address)
1644 {
1645   address->m_len  = sizeof(struct sockaddr_un);
1646   address->m_addr = (struct sockaddr *)malloc(address->m_len);
1647   if (address->m_addr == NULL)
1648   {
1649     address->m_error = GSOCK_MEMERR;
1650     return GSOCK_MEMERR;
1651   }
1652
1653   address->m_family = GSOCK_UNIX;
1654   address->m_realfamily = PF_UNIX;
1655   ((struct sockaddr_un *)address->m_addr)->sun_family = AF_UNIX;
1656   ((struct sockaddr_un *)address->m_addr)->sun_path[0] = 0;
1657
1658   return GSOCK_NOERROR;
1659 }
1660
1661 GSocketError GAddress_UNIX_SetPath(GAddress *address, const char *path)
1662 {
1663   struct sockaddr_un *addr;
1664
1665   assert(address != NULL);
1666
1667   CHECK_ADDRESS(address, UNIX);
1668
1669   addr = ((struct sockaddr_un *)address->m_addr);
1670   memcpy(addr->sun_path, path, strlen(path));
1671
1672   return GSOCK_NOERROR;
1673 }
1674
1675 GSocketError GAddress_UNIX_GetPath(GAddress *address, char *path, size_t sbuf)
1676 {
1677   struct sockaddr_un *addr;
1678
1679   assert(address != NULL);
1680   CHECK_ADDRESS(address, UNIX);
1681
1682   addr = (struct sockaddr_un *)address->m_addr;
1683
1684   strncpy(path, addr->sun_path, sbuf);
1685
1686   return GSOCK_NOERROR;
1687 }
1688 #endif
1689   /* __EMX__ */
1690 #endif
1691   /* wxUSE_SOCKETS || defined(__GSOCKET_STANDALONE__) */
1692