src/unix/gsocket.cpp

   1 /* -------------------------------------------------------------------------
   2  * Project: GSocket (Generic Socket) for WX
   3  * Name:    gsocket.c
   4  * Authors: David Elliott (C++ conversion, maintainer)
   5  *          Guilhem Lavaux,
   6  *          Guillermo Rodriguez Garcia <guille@iies.es>
   7  * Purpose: GSocket main Unix and OS/2 file
   8  * Licence: The wxWindows licence
   9  * CVSID:   $Id$
  10  * -------------------------------------------------------------------------
  11  */
  12
  13 /*
  14  * PLEASE don't put C++ comments here - this is a C source file.
  15  */
  16
  17 #ifndef __GSOCKET_STANDALONE__
  18 #include "wx/setup.h"
  19 #endif
  20
  21 #if defined(__VISAGECPP__)
  22 /* Seems to be needed by Visual Age C++, though I don't see how it manages
  23    to not break on including a C++ header into a plain C source file      */
  24 #include "wx/defs.h"
  25 #define BSD_SELECT /* use Berkley Sockets select */
  26 #endif
  27
  28 #if wxUSE_SOCKETS || defined(__GSOCKET_STANDALONE__)
  29
  30 #include <assert.h>
  31 #include <sys/types.h>
  32 #ifdef __VISAGECPP__
  33 #include <string.h>
  34 #include <sys/time.h>
  35 #include <types.h>
  36 #include <netinet/in.h>
  37 #endif
  38 #include <netdb.h>
  39 #include <sys/ioctl.h>
  40
  41 #ifdef __VMS__
  42 #include <socket.h>
  43 struct sockaddr_un
  44 {
  45     u_char  sun_len;        /* sockaddr len including null */
  46     u_char  sun_family;     /* AF_UNIX */
  47     char    sun_path[108];  /* path name (gag) */
  48 };
  49 #else
  50 #include <sys/socket.h>
  51 #include <sys/un.h>
  52 #endif
  53
  54 #ifndef __VISAGECPP__
  55 #include <sys/time.h>
  56 #include <netinet/in.h>
  57 #include <arpa/inet.h>
  58 #include <errno.h>
  59 #include <string.h>
  60 #include <unistd.h>
  61 #else
  62 #include <nerrno.h>
  63 #  if __IBMCPP__ < 400
  64 #include <machine/endian.h>
  65 #include <socket.h>
  66 #include <ioctl.h>
  67 #include <select.h>
  68 #include <unistd.h>
  69
  70 #define EBADF   SOCEBADF
  71
  72 #    ifdef min
  73 #    undef min
  74 #    endif
  75 #  else
  76 #include <sys/socket.h>
  77 #include <sys/ioctl.h>
  78 #include <sys/select.h>
  79
  80 #define close(a) soclose(a)
  81 #define select(a,b,c,d,e) bsdselect(a,b,c,d,e)
  82 int _System bsdselect(int,
  83                       struct fd_set *,
  84                       struct fd_set *,
  85                       struct fd_set *,
  86                       struct timeval *);
  87 int _System soclose(int);
  88 #  endif
  89 #endif
  90 #ifdef __EMX__
  91 #include <sys/select.h>
  92 #endif
  93
  94 #include <stdio.h>
  95 #include <stdlib.h>
  96 #include <stddef.h>
  97 #include <ctype.h>
  98 #ifdef sun
  99 #  include <sys/filio.h>
 100 #endif
 101 #ifdef sgi
 102 #  include <bstring.h>
 103 #endif
 104 #ifdef _AIX
 105 #  include <strings.h>
 106 #endif
 107 #include <signal.h>
 108
 109 #ifndef SOCKLEN_T
 110
 111 #ifdef VMS
 112 #  define SOCKLEN_T unsigned int
 113 #else
 114 #  ifdef __GLIBC__
 115 #    if __GLIBC__ == 2
 116 #      define SOCKLEN_T socklen_t
 117 #    endif
 118 #  else
 119 #    define SOCKLEN_T int
 120 #  endif
 121 #endif
 122
 123 #endif /* SOCKLEN_T */
 124
 125 #ifndef SOCKOPTLEN_T
 126 #define SOCKOPTLEN_T SOCKLEN_T
 127 #endif
 128
 129 /*
 130  * MSW defines this, Unices don't.
 131  */
 132 #ifndef INVALID_SOCKET
 133 #define INVALID_SOCKET -1
 134 #endif
 135
 136 /* UnixWare reportedly needs this for FIONBIO definition */
 137 #ifdef __UNIXWARE__
 138 #include <sys/filio.h>
 139 #endif
 140
 141 /*
 142  * INADDR_BROADCAST is identical to INADDR_NONE which is not defined
 143  * on all systems. INADDR_BROADCAST should be fine to indicate an error.
 144  */
 145 #ifndef INADDR_NONE
 146 #define INADDR_NONE INADDR_BROADCAST
 147 #endif
 148
 149 #define MASK_SIGNAL()                       \
 150 {                                           \
 151   void (*old_handler)(int);                 \
 152                                             \
 153   old_handler = signal(SIGPIPE, SIG_IGN);
 154
 155 #define UNMASK_SIGNAL()                     \
 156   signal(SIGPIPE, old_handler);             \
 157 }
 158
 159 /* If a SIGPIPE is issued by a socket call on a remotely closed socket,
 160    the program will "crash" unless it explicitly handles the SIGPIPE.
 161    By using MSG_NOSIGNAL, the SIGPIPE is suppressed. Later, we will
 162    use SO_NOSIGPIPE (if available), the BSD equivalent. */
 163 #ifdef MSG_NOSIGNAL
 164 #  define GSOCKET_MSG_NOSIGNAL MSG_NOSIGNAL
 165 #else /* MSG_NOSIGNAL not available (FreeBSD including OS X) */
 166 #  define GSOCKET_MSG_NOSIGNAL 0
 167 #endif /* MSG_NOSIGNAL */
 168
 169 #ifndef __GSOCKET_STANDALONE__
 170 #  include "wx/unix/gsockunx.h"
 171 #  include "wx/gsocket.h"
 172 #else
 173 #  include "gsockunx.h"
 174 #  include "gsocket.h"
 175 #endif /* __GSOCKET_STANDALONE__ */
 176
 177 /* debugging helpers */
 178 #ifdef __GSOCKET_DEBUG__
 179 #  define GSocket_Debug(args) printf args
 180 #else
 181 #  define GSocket_Debug(args)
 182 #endif /* __GSOCKET_DEBUG__ */
 183
 184 /* Table of GUI-related functions. We must call them indirectly because
 185  * of wxBase and GUI separation: */
 186
 187 static GSocketGUIFunctionsTable *gs_gui_functions;
 188
 189 class GSocketGUIFunctionsTableNull: public GSocketGUIFunctionsTable
 190 {
 191 public:
 192     virtual bool OnInit();
 193     virtual void OnExit();
 194     virtual bool CanUseEventLoop();
 195     virtual bool Init_Socket(GSocket *socket);
 196     virtual void Destroy_Socket(GSocket *socket);
 197     virtual void Install_Callback(GSocket *socket, GSocketEvent event);
 198     virtual void Uninstall_Callback(GSocket *socket, GSocketEvent event);
 199     virtual void Enable_Events(GSocket *socket);
 200     virtual void Disable_Events(GSocket *socket);
 201 };
 202
 203 bool GSocketGUIFunctionsTableNull::OnInit()
 204 {   return true; }
 205 void GSocketGUIFunctionsTableNull::OnExit()
 206 {}
 207 bool GSocketGUIFunctionsTableNull::CanUseEventLoop()
 208 {   return false; }
 209 bool GSocketGUIFunctionsTableNull::Init_Socket(GSocket *socket)
 210 {   return true; }
 211 void GSocketGUIFunctionsTableNull::Destroy_Socket(GSocket *socket)
 212 {}
 213 void GSocketGUIFunctionsTableNull::Install_Callback(GSocket *socket, GSocketEvent event)
 214 {}
 215 void GSocketGUIFunctionsTableNull::Uninstall_Callback(GSocket *socket, GSocketEvent event)
 216 {}
 217 void GSocketGUIFunctionsTableNull::Enable_Events(GSocket *socket)
 218 {}
 219 void GSocketGUIFunctionsTableNull::Disable_Events(GSocket *socket)
 220 {}
 221 /* Global initialisers */
 222
 223 void GSocket_SetGUIFunctions(GSocketGUIFunctionsTable *guifunc)
 224 {
 225   gs_gui_functions = guifunc;
 226 }
 227
 228 int GSocket_Init(void)
 229 {
 230   if (!gs_gui_functions)
 231   {
 232     static GSocketGUIFunctionsTableNull table;
 233     gs_gui_functions = &table;
 234   }
 235   if ( !gs_gui_functions->OnInit() )
 236     return 0;
 237   return 1;
 238 }
 239
 240 void GSocket_Cleanup(void)
 241 {
 242   if (gs_gui_functions)
 243   {
 244       gs_gui_functions->OnExit();
 245   }
 246 }
 247
 248 /* Constructors / Destructors for GSocket */
 249
 250 GSocket::GSocket()
 251 {
 252   int i;
 253
 254   m_fd                  = INVALID_SOCKET;
 255   for (i=0;i<GSOCK_MAX_EVENT;i++)
 256   {
 257     m_cbacks[i]         = NULL;
 258   }
 259   m_detected            = 0;
 260   m_local               = NULL;
 261   m_peer                = NULL;
 262   m_error               = GSOCK_NOERROR;
 263   m_server              = false;
 264   m_stream              = true;
 265   m_gui_dependent       = NULL;
 266   m_non_blocking        = false;
 267   m_reusable            = false;
 268   m_timeout             = 10*60*1000;
 269                                 /* 10 minutes * 60 sec * 1000 millisec */
 270   m_establishing        = false;
 271
 272   assert(gs_gui_functions);
 273   /* Per-socket GUI-specific initialization */
 274   m_ok = gs_gui_functions->Init_Socket(this);
 275 }
 276
 277 void GSocket::Close()
 278 {
 279     gs_gui_functions->Disable_Events(this);
 280     /* gsockosx.c calls CFSocketInvalidate which closes the socket for us */
 281 #if !(defined(__DARWIN__) && (defined(__WXMAC__) || defined(__WXCOCOA__)))
 282     close(m_fd);
 283 #endif
 284     m_fd = INVALID_SOCKET;
 285 }
 286
 287 GSocket::~GSocket()
 288 {
 289   assert(this);
 290
 291   /* Check that the socket is really shutdowned */
 292   if (m_fd != INVALID_SOCKET)
 293     Shutdown();
 294
 295   /* Per-socket GUI-specific cleanup */
 296   gs_gui_functions->Destroy_Socket(this);
 297
 298   /* Destroy private addresses */
 299   if (m_local)
 300     GAddress_destroy(m_local);
 301
 302   if (m_peer)
 303     GAddress_destroy(m_peer);
 304 }
 305
 306 /* GSocket_Shutdown:
 307  *  Disallow further read/write operations on this socket, close
 308  *  the fd and disable all callbacks.
 309  */
 310 void GSocket::Shutdown()
 311 {
 312   int evt;
 313
 314   assert(this);
 315
 316   /* If socket has been created, shutdown it */
 317   if (m_fd != INVALID_SOCKET)
 318   {
 319     shutdown(m_fd, 2);
 320     Close();
 321   }
 322
 323   /* Disable GUI callbacks */
 324   for (evt = 0; evt < GSOCK_MAX_EVENT; evt++)
 325     m_cbacks[evt] = NULL;
 326
 327   m_detected = GSOCK_LOST_FLAG;
 328 }
 329
 330 /* Address handling */
 331
 332 /* GSocket_SetLocal:
 333  * GSocket_GetLocal:
 334  * GSocket_SetPeer:
 335  * GSocket_GetPeer:
 336  *  Set or get the local or peer address for this socket. The 'set'
 337  *  functions return GSOCK_NOERROR on success, an error code otherwise.
 338  *  The 'get' functions return a pointer to a GAddress object on success,
 339  *  or NULL otherwise, in which case they set the error code of the
 340  *  corresponding GSocket.
 341  *
 342  *  Error codes:
 343  *    GSOCK_INVSOCK - the socket is not valid.
 344  *    GSOCK_INVADDR - the address is not valid.
 345  */
 346 GSocketError GSocket::SetLocal(GAddress *address)
 347 {
 348   assert(this);
 349
 350   /* the socket must be initialized, or it must be a server */
 351   if ((m_fd != INVALID_SOCKET && !m_server))
 352   {
 353     m_error = GSOCK_INVSOCK;
 354     return GSOCK_INVSOCK;
 355   }
 356
 357   /* check address */
 358   if (address == NULL || address->m_family == GSOCK_NOFAMILY)
 359   {
 360     m_error = GSOCK_INVADDR;
 361     return GSOCK_INVADDR;
 362   }
 363
 364   if (m_local)
 365     GAddress_destroy(m_local);
 366
 367   m_local = GAddress_copy(address);
 368
 369   return GSOCK_NOERROR;
 370 }
 371
 372 GSocketError GSocket::SetPeer(GAddress *address)
 373 {
 374   assert(this);
 375
 376   /* check address */
 377   if (address == NULL || address->m_family == GSOCK_NOFAMILY)
 378   {
 379     m_error = GSOCK_INVADDR;
 380     return GSOCK_INVADDR;
 381   }
 382
 383   if (m_peer)
 384     GAddress_destroy(m_peer);
 385
 386   m_peer = GAddress_copy(address);
 387
 388   return GSOCK_NOERROR;
 389 }
 390
 391 GAddress *GSocket::GetLocal()
 392 {
 393   GAddress *address;
 394   struct sockaddr addr;
 395   SOCKLEN_T size = sizeof(addr);
 396   GSocketError err;
 397
 398   assert(this);
 399
 400   /* try to get it from the m_local var first */
 401   if (m_local)
 402     return GAddress_copy(m_local);
 403
 404   /* else, if the socket is initialized, try getsockname */
 405   if (m_fd == INVALID_SOCKET)
 406   {
 407     m_error = GSOCK_INVSOCK;
 408     return NULL;
 409   }
 410
 411   if (getsockname(m_fd, &addr, (SOCKLEN_T *) &size) < 0)
 412   {
 413     m_error = GSOCK_IOERR;
 414     return NULL;
 415   }
 416
 417   /* got a valid address from getsockname, create a GAddress object */
 418   address = GAddress_new();
 419   if (address == NULL)
 420   {
 421     m_error = GSOCK_MEMERR;
 422     return NULL;
 423   }
 424
 425   err = _GAddress_translate_from(address, &addr, size);
 426   if (err != GSOCK_NOERROR)
 427   {
 428     GAddress_destroy(address);
 429     m_error = err;
 430     return NULL;
 431   }
 432
 433   return address;
 434 }
 435
 436 GAddress *GSocket::GetPeer()
 437 {
 438   assert(this);
 439
 440   /* try to get it from the m_peer var */
 441   if (m_peer)
 442     return GAddress_copy(m_peer);
 443
 444   return NULL;
 445 }
 446
 447 /* Server specific parts */
 448
 449 /* GSocket_SetServer:
 450  *  Sets up this socket as a server. The local address must have been
 451  *  set with GSocket_SetLocal() before GSocket_SetServer() is called.
 452  *  Returns GSOCK_NOERROR on success, one of the following otherwise:
 453  *
 454  *  Error codes:
 455  *    GSOCK_INVSOCK - the socket is in use.
 456  *    GSOCK_INVADDR - the local address has not been set.
 457  *    GSOCK_IOERR   - low-level error.
 458  */
 459 GSocketError GSocket::SetServer()
 460 {
 461   int arg = 1;
 462
 463   assert(this);
 464
 465   /* must not be in use */
 466   if (m_fd != INVALID_SOCKET)
 467   {
 468     m_error = GSOCK_INVSOCK;
 469     return GSOCK_INVSOCK;
 470   }
 471
 472   /* the local addr must have been set */
 473   if (!m_local)
 474   {
 475     m_error = GSOCK_INVADDR;
 476     return GSOCK_INVADDR;
 477   }
 478
 479   /* Initialize all fields */
 480   m_stream   = true;
 481   m_server   = true;
 482
 483   /* Create the socket */
 484   m_fd = socket(m_local->m_realfamily, SOCK_STREAM, 0);
 485
 486   if (m_fd == INVALID_SOCKET)
 487   {
 488     m_error = GSOCK_IOERR;
 489     return GSOCK_IOERR;
 490   }
 491
 492   /* FreeBSD variants can't use MSG_NOSIGNAL, and instead use a socket option */
 493 #ifdef SO_NOSIGPIPE
 494   setsockopt(m_fd, SOL_SOCKET, SO_NOSIGPIPE, (const char*)&arg, sizeof(u_long));
 495 #endif
 496
 497   ioctl(m_fd, FIONBIO, &arg);
 498   gs_gui_functions->Enable_Events(this);
 499
 500   /* allow a socket to re-bind if the socket is in the TIME_WAIT
 501      state after being previously closed.
 502    */
 503   if (m_reusable)
 504     setsockopt(m_fd, SOL_SOCKET, SO_REUSEADDR, (const char*)&arg, sizeof(u_long));
 505
 506   /* Bind to the local address,
 507    * retrieve the actual address bound,
 508    * and listen up to 5 connections.
 509    */
 510   if ((bind(m_fd, m_local->m_addr, m_local->m_len) != 0) ||
 511       (getsockname(m_fd,
 512                    m_local->m_addr,
 513                    (SOCKLEN_T *) &m_local->m_len) != 0) ||
 514       (listen(m_fd, 5) != 0))
 515   {
 516     Close();
 517     m_error = GSOCK_IOERR;
 518     return GSOCK_IOERR;
 519   }
 520
 521   return GSOCK_NOERROR;
 522 }
 523
 524 /* GSocket_WaitConnection:
 525  *  Waits for an incoming client connection. Returns a pointer to
 526  *  a GSocket object, or NULL if there was an error, in which case
 527  *  the last error field will be updated for the calling GSocket.
 528  *
 529  *  Error codes (set in the calling GSocket)
 530  *    GSOCK_INVSOCK    - the socket is not valid or not a server.
 531  *    GSOCK_TIMEDOUT   - timeout, no incoming connections.
 532  *    GSOCK_WOULDBLOCK - the call would block and the socket is nonblocking.
 533  *    GSOCK_MEMERR     - couldn't allocate memory.
 534  *    GSOCK_IOERR      - low-level error.
 535  */
 536 GSocket *GSocket::WaitConnection()
 537 {
 538   struct sockaddr from;
 539   SOCKLEN_T fromlen = sizeof(from);
 540   GSocket *connection;
 541   GSocketError err;
 542   int arg = 1;
 543
 544   assert(this);
 545
 546   /* If the socket has already been created, we exit immediately */
 547   if (m_fd == INVALID_SOCKET || !m_server)
 548   {
 549     m_error = GSOCK_INVSOCK;
 550     return NULL;
 551   }
 552
 553   /* Create a GSocket object for the new connection */
 554   connection = GSocket_new();
 555
 556   if (!connection)
 557   {
 558     m_error = GSOCK_MEMERR;
 559     return NULL;
 560   }
 561
 562   /* Wait for a connection (with timeout) */
 563   if (Input_Timeout() == GSOCK_TIMEDOUT)
 564   {
 565     delete connection;
 566     /* m_error set by _GSocket_Input_Timeout */
 567     return NULL;
 568   }
 569
 570   connection->m_fd = accept(m_fd, &from, (SOCKLEN_T *) &fromlen);
 571
 572   /* Reenable CONNECTION events */
 573   Enable(GSOCK_CONNECTION);
 574
 575   if (connection->m_fd == INVALID_SOCKET)
 576   {
 577     if (errno == EWOULDBLOCK)
 578       m_error = GSOCK_WOULDBLOCK;
 579     else
 580       m_error = GSOCK_IOERR;
 581
 582     delete connection;
 583     return NULL;
 584   }
 585
 586   /* Initialize all fields */
 587   connection->m_server   = false;
 588   connection->m_stream   = true;
 589
 590   /* Setup the peer address field */
 591   connection->m_peer = GAddress_new();
 592   if (!connection->m_peer)
 593   {
 594     delete connection;
 595     m_error = GSOCK_MEMERR;
 596     return NULL;
 597   }
 598   err = _GAddress_translate_from(connection->m_peer, &from, fromlen);
 599   if (err != GSOCK_NOERROR)
 600   {
 601     delete connection;
 602     m_error = err;
 603     return NULL;
 604   }
 605 #if defined(__EMX__) || defined(__VISAGECPP__)
 606   ioctl(connection->m_fd, FIONBIO, (char*)&arg, sizeof(arg));
 607 #else
 608   ioctl(connection->m_fd, FIONBIO, &arg);
 609 #endif
 610   gs_gui_functions->Enable_Events(connection);
 611
 612   return connection;
 613 }
 614
 615 bool GSocket::SetReusable()
 616 {
 617     /* socket must not be null, and must not be in use/already bound */
 618     if (this && m_fd == INVALID_SOCKET) {
 619         m_reusable = true;
 620         return true;
 621     }
 622     return false;
 623 }
 624
 625 /* Client specific parts */
 626
 627 /* GSocket_Connect:
 628  *  For stream (connection oriented) sockets, GSocket_Connect() tries
 629  *  to establish a client connection to a server using the peer address
 630  *  as established with GSocket_SetPeer(). Returns GSOCK_NOERROR if the
 631  *  connection has been succesfully established, or one of the error
 632  *  codes listed below. Note that for nonblocking sockets, a return
 633  *  value of GSOCK_WOULDBLOCK doesn't mean a failure. The connection
 634  *  request can be completed later; you should use GSocket_Select()
 635  *  to poll for GSOCK_CONNECTION | GSOCK_LOST, or wait for the
 636  *  corresponding asynchronous events.
 637  *
 638  *  For datagram (non connection oriented) sockets, GSocket_Connect()
 639  *  just sets the peer address established with GSocket_SetPeer() as
 640  *  default destination.
 641  *
 642  *  Error codes:
 643  *    GSOCK_INVSOCK    - the socket is in use or not valid.
 644  *    GSOCK_INVADDR    - the peer address has not been established.
 645  *    GSOCK_TIMEDOUT   - timeout, the connection failed.
 646  *    GSOCK_WOULDBLOCK - connection in progress (nonblocking sockets only)
 647  *    GSOCK_MEMERR     - couldn't allocate memory.
 648  *    GSOCK_IOERR      - low-level error.
 649  */
 650 GSocketError GSocket::Connect(GSocketStream stream)
 651 {
 652   int err, ret;
 653   int arg = 1;
 654
 655   assert(this);
 656
 657   /* Enable CONNECTION events (needed for nonblocking connections) */
 658   Enable(GSOCK_CONNECTION);
 659
 660   if (m_fd != INVALID_SOCKET)
 661   {
 662     m_error = GSOCK_INVSOCK;
 663     return GSOCK_INVSOCK;
 664   }
 665
 666   if (!m_peer)
 667   {
 668     m_error = GSOCK_INVADDR;
 669     return GSOCK_INVADDR;
 670   }
 671
 672   /* Streamed or dgram socket? */
 673   m_stream   = (stream == GSOCK_STREAMED);
 674   m_server   = false;
 675   m_establishing = false;
 676
 677   /* Create the socket */
 678   m_fd = socket(m_peer->m_realfamily,
 679                      m_stream? SOCK_STREAM : SOCK_DGRAM, 0);
 680
 681   if (m_fd == INVALID_SOCKET)
 682   {
 683     m_error = GSOCK_IOERR;
 684     return GSOCK_IOERR;
 685   }
 686
 687   /* FreeBSD variants can't use MSG_NOSIGNAL, and instead use a socket option */
 688 #ifdef SO_NOSIGPIPE
 689   setsockopt(m_fd, SOL_SOCKET, SO_NOSIGPIPE, (const char*)&arg, sizeof(u_long));
 690 #endif
 691
 692 #if defined(__EMX__) || defined(__VISAGECPP__)
 693   ioctl(m_fd, FIONBIO, (char*)&arg, sizeof(arg));
 694 #else
 695   ioctl(m_fd, FIONBIO, &arg);
 696 #endif
 697
 698   /* Connect it to the peer address, with a timeout (see below) */
 699   ret = connect(m_fd, m_peer->m_addr, m_peer->m_len);
 700
 701   /* We only call Enable_Events if we know e aren't shutting down the socket */
 702
 703   if (m_non_blocking)
 704   {
 705     gs_gui_functions->Enable_Events(this);
 706   }
 707
 708   if (ret == -1)
 709   {
 710     err = errno;
 711
 712     /* If connect failed with EINPROGRESS and the GSocket object
 713      * is in blocking mode, we select() for the specified timeout
 714      * checking for writability to see if the connection request
 715      * completes.
 716      */
 717     if ((err == EINPROGRESS) && (!m_non_blocking))
 718     {
 719       if (Output_Timeout() == GSOCK_TIMEDOUT)
 720       {
 721         Close();
 722         /* m_error is set in _GSocket_Output_Timeout */
 723         return GSOCK_TIMEDOUT;
 724       }
 725       else
 726       {
 727         int error;
 728         SOCKOPTLEN_T len = sizeof(error);
 729
 730         getsockopt(m_fd, SOL_SOCKET, SO_ERROR, (char*) &error, &len);
 731
 732         gs_gui_functions->Enable_Events(this);
 733
 734         if (!error)
 735           return GSOCK_NOERROR;
 736       }
 737     }
 738
 739     /* If connect failed with EINPROGRESS and the GSocket object
 740      * is set to nonblocking, we set m_error to GSOCK_WOULDBLOCK
 741      * (and return GSOCK_WOULDBLOCK) but we don't close the socket;
 742      * this way if the connection completes, a GSOCK_CONNECTION
 743      * event will be generated, if enabled.
 744      */
 745     if ((err == EINPROGRESS) && (m_non_blocking))
 746     {
 747       m_establishing = true;
 748       m_error = GSOCK_WOULDBLOCK;
 749       return GSOCK_WOULDBLOCK;
 750     }
 751
 752     /* If connect failed with an error other than EINPROGRESS,
 753      * then the call to GSocket_Connect has failed.
 754      */
 755     Close();
 756     m_error = GSOCK_IOERR;
 757     return GSOCK_IOERR;
 758   }
 759
 760   return GSOCK_NOERROR;
 761 }
 762
 763 /* Datagram sockets */
 764
 765 /* GSocket_SetNonOriented:
 766  *  Sets up this socket as a non-connection oriented (datagram) socket.
 767  *  Before using this function, the local address must have been set
 768  *  with GSocket_SetLocal(), or the call will fail. Returns GSOCK_NOERROR
 769  *  on success, or one of the following otherwise.
 770  *
 771  *  Error codes:
 772  *    GSOCK_INVSOCK - the socket is in use.
 773  *    GSOCK_INVADDR - the local address has not been set.
 774  *    GSOCK_IOERR   - low-level error.
 775  */
 776 GSocketError GSocket::SetNonOriented()
 777 {
 778   int arg = 1;
 779
 780   assert(this);
 781
 782   if (m_fd != INVALID_SOCKET)
 783   {
 784     m_error = GSOCK_INVSOCK;
 785     return GSOCK_INVSOCK;
 786   }
 787
 788   if (!m_local)
 789   {
 790     m_error = GSOCK_INVADDR;
 791     return GSOCK_INVADDR;
 792   }
 793
 794   /* Initialize all fields */
 795   m_stream   = false;
 796   m_server   = false;
 797
 798   /* Create the socket */
 799   m_fd = socket(m_local->m_realfamily, SOCK_DGRAM, 0);
 800
 801   if (m_fd == INVALID_SOCKET)
 802   {
 803     m_error = GSOCK_IOERR;
 804     return GSOCK_IOERR;
 805   }
 806 #if defined(__EMX__) || defined(__VISAGECPP__)
 807   ioctl(m_fd, FIONBIO, (char*)&arg, sizeof(arg));
 808 #else
 809   ioctl(m_fd, FIONBIO, &arg);
 810 #endif
 811   gs_gui_functions->Enable_Events(this);
 812
 813   /* Bind to the local address,
 814    * and retrieve the actual address bound.
 815    */
 816   if ((bind(m_fd, m_local->m_addr, m_local->m_len) != 0) ||
 817       (getsockname(m_fd,
 818                    m_local->m_addr,
 819                    (SOCKLEN_T *) &m_local->m_len) != 0))
 820   {
 821     Close();
 822     m_error = GSOCK_IOERR;
 823     return GSOCK_IOERR;
 824   }
 825
 826   return GSOCK_NOERROR;
 827 }
 828
 829 /* Generic IO */
 830
 831 /* Like recv(), send(), ... */
 832 int GSocket::Read(char *buffer, int size)
 833 {
 834   int ret;
 835
 836   assert(this);
 837
 838   if (m_fd == INVALID_SOCKET || m_server)
 839   {
 840     m_error = GSOCK_INVSOCK;
 841     return -1;
 842   }
 843
 844   /* Disable events during query of socket status */
 845   Disable(GSOCK_INPUT);
 846
 847   /* If the socket is blocking, wait for data (with a timeout) */
 848   if (Input_Timeout() == GSOCK_TIMEDOUT)
 849     /* We no longer return here immediately, otherwise socket events would not be re-enabled! */
 850     ret = -1;
 851   else {
 852     /* Read the data */
 853     if (m_stream)
 854       ret = Recv_Stream(buffer, size);
 855     else
 856       ret = Recv_Dgram(buffer, size);
 857   }
 858
 859   if (ret == -1)
 860   {
 861     if ((errno == EWOULDBLOCK) || (errno == EAGAIN))
 862       m_error = GSOCK_WOULDBLOCK;
 863     else
 864       m_error = GSOCK_IOERR;
 865   }
 866
 867   /* Enable events again now that we are done processing */
 868   Enable(GSOCK_INPUT);
 869
 870   return ret;
 871 }
 872
 873 int GSocket::Write(const char *buffer, int size)
 874 {
 875   int ret;
 876
 877   assert(this);
 878
 879   GSocket_Debug(( "GSocket_Write #1, size %d\n", size ));
 880
 881   if (m_fd == INVALID_SOCKET || m_server)
 882   {
 883     m_error = GSOCK_INVSOCK;
 884     return -1;
 885   }
 886
 887   GSocket_Debug(( "GSocket_Write #2, size %d\n", size ));
 888
 889   /* If the socket is blocking, wait for writability (with a timeout) */
 890   if (Output_Timeout() == GSOCK_TIMEDOUT)
 891     return -1;
 892
 893   GSocket_Debug(( "GSocket_Write #3, size %d\n", size ));
 894
 895   /* Write the data */
 896   if (m_stream)
 897     ret = Send_Stream(buffer, size);
 898   else
 899     ret = Send_Dgram(buffer, size);
 900
 901   GSocket_Debug(( "GSocket_Write #4, size %d\n", size ));
 902
 903   if (ret == -1)
 904   {
 905     if ((errno == EWOULDBLOCK) || (errno == EAGAIN))
 906     {
 907       m_error = GSOCK_WOULDBLOCK;
 908       GSocket_Debug(( "GSocket_Write error WOULDBLOCK\n" ));
 909     }
 910     else
 911     {
 912       m_error = GSOCK_IOERR;
 913       GSocket_Debug(( "GSocket_Write error IOERR\n" ));
 914     }
 915
 916     /* Only reenable OUTPUT events after an error (just like WSAAsyncSelect
 917      * in MSW). Once the first OUTPUT event is received, users can assume
 918      * that the socket is writable until a read operation fails. Only then
 919      * will further OUTPUT events be posted.
 920      */
 921     Enable(GSOCK_OUTPUT);
 922     return -1;
 923   }
 924
 925   GSocket_Debug(( "GSocket_Write #5, size %d ret %d\n", size, ret ));
 926
 927   return ret;
 928 }
 929
 930 /* GSocket_Select:
 931  *  Polls the socket to determine its status. This function will
 932  *  check for the events specified in the 'flags' parameter, and
 933  *  it will return a mask indicating which operations can be
 934  *  performed. This function won't block, regardless of the
 935  *  mode (blocking | nonblocking) of the socket.
 936  */
 937 GSocketEventFlags GSocket::Select(GSocketEventFlags flags)
 938 {
 939   if (!gs_gui_functions->CanUseEventLoop())
 940   {
 941
 942     GSocketEventFlags result = 0;
 943     fd_set readfds;
 944     fd_set writefds;
 945     fd_set exceptfds;
 946     struct timeval tv;
 947
 948     assert(this);
 949
 950     /* Do not use a static struct, Linux can garble it */
 951     tv.tv_sec = m_timeout / 1000;
 952     tv.tv_usec = (m_timeout % 1000) * 1000;
 953
 954     FD_ZERO(&readfds);
 955     FD_ZERO(&writefds);
 956     FD_ZERO(&exceptfds);
 957     FD_SET(m_fd, &readfds);
 958     if (flags & GSOCK_OUTPUT_FLAG || flags & GSOCK_CONNECTION_FLAG)
 959       FD_SET(m_fd, &writefds);
 960     FD_SET(m_fd, &exceptfds);
 961
 962     /* Check 'sticky' CONNECTION flag first */
 963     result |= (GSOCK_CONNECTION_FLAG & m_detected);
 964
 965     /* If we have already detected a LOST event, then don't try
 966      * to do any further processing.
 967      */
 968     if ((m_detected & GSOCK_LOST_FLAG) != 0)
 969     {
 970       m_establishing = false;
 971
 972       return (GSOCK_LOST_FLAG & flags);
 973     }
 974
 975     /* Try select now */
 976     if (select(m_fd + 1, &readfds, &writefds, &exceptfds, &tv) <= 0)
 977     {
 978       /* What to do here? */
 979       return (result & flags);
 980     }
 981
 982     /* Check for readability */
 983     if (FD_ISSET(m_fd, &readfds))
 984     {
 985       char c;
 986
 987       int num = recv(m_fd, &c, 1, MSG_PEEK | GSOCKET_MSG_NOSIGNAL);
 988
 989       if (num > 0)
 990       {
 991         result |= GSOCK_INPUT_FLAG;
 992       }
 993       else
 994       {
 995         if (m_server && m_stream)
 996         {
 997           result |= GSOCK_CONNECTION_FLAG;
 998           m_detected |= GSOCK_CONNECTION_FLAG;
 999         }
1000         else if ((errno != EWOULDBLOCK) && (errno != EAGAIN) && (errno != EINTR))
1001         {
1002           m_detected = GSOCK_LOST_FLAG;
1003           m_establishing = false;
1004
1005           /* LOST event: Abort any further processing */
1006           return (GSOCK_LOST_FLAG & flags);
1007         }
1008       }
1009     }
1010
1011     /* Check for writability */
1012     if (FD_ISSET(m_fd, &writefds))
1013     {
1014       if (m_establishing && !m_server)
1015       {
1016         int error;
1017         SOCKOPTLEN_T len = sizeof(error);
1018
1019         m_establishing = false;
1020
1021         getsockopt(m_fd, SOL_SOCKET, SO_ERROR, (char*)&error, &len);
1022
1023         if (error)
1024         {
1025           m_detected = GSOCK_LOST_FLAG;
1026
1027           /* LOST event: Abort any further processing */
1028           return (GSOCK_LOST_FLAG & flags);
1029         }
1030         else
1031         {
1032           result |= GSOCK_CONNECTION_FLAG;
1033           m_detected |= GSOCK_CONNECTION_FLAG;
1034         }
1035       }
1036       else
1037       {
1038         result |= GSOCK_OUTPUT_FLAG;
1039       }
1040     }
1041
1042     /* Check for exceptions and errors (is this useful in Unices?) */
1043     if (FD_ISSET(m_fd, &exceptfds))
1044     {
1045       m_establishing = false;
1046       m_detected = GSOCK_LOST_FLAG;
1047
1048       /* LOST event: Abort any further processing */
1049       return (GSOCK_LOST_FLAG & flags);
1050     }
1051
1052     return (result & flags);
1053
1054   }
1055   else
1056   {
1057
1058     assert(this);
1059     return flags & m_detected;
1060
1061   }
1062 }
1063
1064 /* Flags */
1065
1066 /* GSocket_SetNonBlocking:
1067  *  Sets the socket to non-blocking mode. All IO calls will return
1068  *  immediately.
1069  */
1070 void GSocket::SetNonBlocking(bool non_block)
1071 {
1072   assert(this);
1073
1074   GSocket_Debug( ("GSocket_SetNonBlocking: %d\n", (int)non_block) );
1075
1076   m_non_blocking = non_block;
1077 }
1078
1079 /* GSocket_SetTimeout:
1080  *  Sets the timeout for blocking calls. Time is expressed in
1081  *  milliseconds.
1082  */
1083 void GSocket::SetTimeout(unsigned long millisec)
1084 {
1085   assert(this);
1086
1087   m_timeout = millisec;
1088 }
1089
1090 /* GSocket_GetError:
1091  *  Returns the last error occured for this socket. Note that successful
1092  *  operations do not clear this back to GSOCK_NOERROR, so use it only
1093  *  after an error.
1094  */
1095 GSocketError WXDLLIMPEXP_NET GSocket::GetError()
1096 {
1097   assert(this);
1098
1099   return m_error;
1100 }
1101
1102 /* Callbacks */
1103
1104 /* GSOCK_INPUT:
1105  *   There is data to be read in the input buffer. If, after a read
1106  *   operation, there is still data available, the callback function will
1107  *   be called again.
1108  * GSOCK_OUTPUT:
1109  *   The socket is available for writing. That is, the next write call
1110  *   won't block. This event is generated only once, when the connection is
1111  *   first established, and then only if a call failed with GSOCK_WOULDBLOCK,
1112  *   when the output buffer empties again. This means that the app should
1113  *   assume that it can write since the first OUTPUT event, and no more
1114  *   OUTPUT events will be generated unless an error occurs.
1115  * GSOCK_CONNECTION:
1116  *   Connection succesfully established, for client sockets, or incoming
1117  *   client connection, for server sockets. Wait for this event (also watch
1118  *   out for GSOCK_LOST) after you issue a nonblocking GSocket_Connect() call.
1119  * GSOCK_LOST:
1120  *   The connection is lost (or a connection request failed); this could
1121  *   be due to a failure, or due to the peer closing it gracefully.
1122  */
1123
1124 /* GSocket_SetCallback:
1125  *  Enables the callbacks specified by 'flags'. Note that 'flags'
1126  *  may be a combination of flags OR'ed toghether, so the same
1127  *  callback function can be made to accept different events.
1128  *  The callback function must have the following prototype:
1129  *
1130  *  void function(GSocket *socket, GSocketEvent event, char *cdata)
1131  */
1132 void GSocket::SetCallback(GSocketEventFlags flags,
1133                          GSocketCallback callback, char *cdata)
1134 {
1135   int count;
1136
1137   assert(this);
1138
1139   for (count = 0; count < GSOCK_MAX_EVENT; count++)
1140   {
1141     if ((flags & (1 << count)) != 0)
1142     {
1143       m_cbacks[count] = callback;
1144       m_data[count] = cdata;
1145     }
1146   }
1147 }
1148
1149 /* GSocket_UnsetCallback:
1150  *  Disables all callbacks specified by 'flags', which may be a
1151  *  combination of flags OR'ed toghether.
1152  */
1153 void GSocket::UnsetCallback(GSocketEventFlags flags)
1154 {
1155   int count;
1156
1157   assert(this);
1158
1159   for (count = 0; count < GSOCK_MAX_EVENT; count++)
1160   {
1161     if ((flags & (1 << count)) != 0)
1162     {
1163       m_cbacks[count] = NULL;
1164       m_data[count] = NULL;
1165     }
1166   }
1167 }
1168
1169 GSocketError GSocket::GetSockOpt(int level, int optname,
1170                                 void *optval, int *optlen)
1171 {
1172     if (getsockopt(m_fd, level, optname, (char*)optval, (SOCKOPTLEN_T*)optlen) == 0)
1173     {
1174         return GSOCK_NOERROR;
1175     }
1176     return GSOCK_OPTERR;
1177 }
1178
1179 GSocketError GSocket::SetSockOpt(int level, int optname,
1180                                 const void *optval, int optlen)
1181 {
1182     if (setsockopt(m_fd, level, optname, (const char*)optval, optlen) == 0)
1183     {
1184         return GSOCK_NOERROR;
1185     }
1186     return GSOCK_OPTERR;
1187 }
1188
1189 #define CALL_CALLBACK(socket, event) {                                  \
1190   socket->Disable(event);                                               \
1191   if (socket->m_cbacks[event])                                          \
1192     socket->m_cbacks[event](socket, event, socket->m_data[event]);      \
1193 }
1194
1195
1196 void GSocket::Enable(GSocketEvent event)
1197 {
1198   m_detected &= ~(1 << event);
1199   gs_gui_functions->Install_Callback(this, event);
1200 }
1201
1202 void GSocket::Disable(GSocketEvent event)
1203 {
1204   m_detected |= (1 << event);
1205   gs_gui_functions->Uninstall_Callback(this, event);
1206 }
1207
1208 /* _GSocket_Input_Timeout:
1209  *  For blocking sockets, wait until data is available or
1210  *  until timeout ellapses.
1211  */
1212 GSocketError GSocket::Input_Timeout()
1213 {
1214   struct timeval tv;
1215   fd_set readfds;
1216   int ret;
1217
1218   /* Linux select() will overwrite the struct on return */
1219   tv.tv_sec  = (m_timeout / 1000);
1220   tv.tv_usec = (m_timeout % 1000) * 1000;
1221
1222   if (!m_non_blocking)
1223   {
1224     FD_ZERO(&readfds);
1225     FD_SET(m_fd, &readfds);
1226     ret = select(m_fd + 1, &readfds, NULL, NULL, &tv);
1227     if (ret == 0)
1228     {
1229       GSocket_Debug(( "GSocket_Input_Timeout, select returned 0\n" ));
1230       m_error = GSOCK_TIMEDOUT;
1231       return GSOCK_TIMEDOUT;
1232     }
1233     if (ret == -1)
1234     {
1235       GSocket_Debug(( "GSocket_Input_Timeout, select returned -1\n" ));
1236       if (errno == EBADF) { GSocket_Debug(( "Invalid file descriptor\n" )); }
1237       if (errno == EINTR) { GSocket_Debug(( "A non blocked signal was caught\n" )); }
1238       if (errno == EINVAL) { GSocket_Debug(( "The highest number descriptor is negative\n" )); }
1239       if (errno == ENOMEM) { GSocket_Debug(( "Not enough memory\n" )); }
1240       m_error = GSOCK_TIMEDOUT;
1241       return GSOCK_TIMEDOUT;
1242     }
1243   }
1244   return GSOCK_NOERROR;
1245 }
1246
1247 /* _GSocket_Output_Timeout:
1248  *  For blocking sockets, wait until data can be sent without
1249  *  blocking or until timeout ellapses.
1250  */
1251 GSocketError GSocket::Output_Timeout()
1252 {
1253   struct timeval tv;
1254   fd_set writefds;
1255   int ret;
1256
1257   /* Linux select() will overwrite the struct on return */
1258   tv.tv_sec  = (m_timeout / 1000);
1259   tv.tv_usec = (m_timeout % 1000) * 1000;
1260
1261   GSocket_Debug( ("m_non_blocking has: %d\n", (int)m_non_blocking) );
1262
1263   if (!m_non_blocking)
1264   {
1265     FD_ZERO(&writefds);
1266     FD_SET(m_fd, &writefds);
1267     ret = select(m_fd + 1, NULL, &writefds, NULL, &tv);
1268     if (ret == 0)
1269     {
1270       GSocket_Debug(( "GSocket_Output_Timeout, select returned 0\n" ));
1271       m_error = GSOCK_TIMEDOUT;
1272       return GSOCK_TIMEDOUT;
1273     }
1274     if (ret == -1)
1275     {
1276       GSocket_Debug(( "GSocket_Output_Timeout, select returned -1\n" ));
1277       if (errno == EBADF) { GSocket_Debug(( "Invalid file descriptor\n" )); }
1278       if (errno == EINTR) { GSocket_Debug(( "A non blocked signal was caught\n" )); }
1279       if (errno == EINVAL) { GSocket_Debug(( "The highest number descriptor is negative\n" )); }
1280       if (errno == ENOMEM) { GSocket_Debug(( "Not enough memory\n" )); }
1281       m_error = GSOCK_TIMEDOUT;
1282       return GSOCK_TIMEDOUT;
1283     }
1284     if ( ! FD_ISSET(m_fd, &writefds) ) {
1285         GSocket_Debug(( "GSocket_Output_Timeout is buggy!\n" ));
1286     }
1287     else {
1288         GSocket_Debug(( "GSocket_Output_Timeout seems correct\n" ));
1289     }
1290   }
1291   else
1292   {
1293     GSocket_Debug(( "GSocket_Output_Timeout, didn't try select!\n" ));
1294   }
1295
1296   return GSOCK_NOERROR;
1297 }
1298
1299 int GSocket::Recv_Stream(char *buffer, int size)
1300 {
1301   int ret;
1302   do
1303   {
1304     ret = recv(m_fd, buffer, size, GSOCKET_MSG_NOSIGNAL);
1305   } while (ret == -1 && errno == EINTR); /* Loop until not interrupted */
1306   return ret;
1307 }
1308
1309 int GSocket::Recv_Dgram(char *buffer, int size)
1310 {
1311   struct sockaddr from;
1312   SOCKLEN_T fromlen = sizeof(from);
1313   int ret;
1314   GSocketError err;
1315
1316   fromlen = sizeof(from);
1317
1318   do
1319   {
1320     ret = recvfrom(m_fd, buffer, size, 0, &from, (SOCKLEN_T *) &fromlen);
1321   } while (ret == -1 && errno == EINTR); /* Loop until not interrupted */
1322
1323   if (ret == -1)
1324     return -1;
1325
1326   /* Translate a system address into a GSocket address */
1327   if (!m_peer)
1328   {
1329     m_peer = GAddress_new();
1330     if (!m_peer)
1331     {
1332       m_error = GSOCK_MEMERR;
1333       return -1;
1334     }
1335   }
1336   err = _GAddress_translate_from(m_peer, &from, fromlen);
1337   if (err != GSOCK_NOERROR)
1338   {
1339     GAddress_destroy(m_peer);
1340     m_peer  = NULL;
1341     m_error = err;
1342     return -1;
1343   }
1344
1345   return ret;
1346 }
1347
1348 int GSocket::Send_Stream(const char *buffer, int size)
1349 {
1350   int ret;
1351
1352 #ifndef __VISAGECPP__
1353    MASK_SIGNAL();
1354 #endif
1355   do
1356   {
1357     ret = send(m_fd, (char *)buffer, size, GSOCKET_MSG_NOSIGNAL);
1358   } while (ret == -1 && errno == EINTR); /* Loop until not interrupted */
1359 #ifndef __VISAGECPP__
1360   UNMASK_SIGNAL();
1361 #endif
1362
1363   return ret;
1364 }
1365
1366 int GSocket::Send_Dgram(const char *buffer, int size)
1367 {
1368   struct sockaddr *addr;
1369   int len, ret;
1370   GSocketError err;
1371
1372   if (!m_peer)
1373   {
1374     m_error = GSOCK_INVADDR;
1375     return -1;
1376   }
1377
1378   err = _GAddress_translate_to(m_peer, &addr, &len);
1379   if (err != GSOCK_NOERROR)
1380   {
1381     m_error = err;
1382     return -1;
1383   }
1384
1385 #ifndef __VISAGECPP__
1386   MASK_SIGNAL();
1387 #endif
1388   do
1389   {
1390     ret = sendto(m_fd, (char *)buffer, size, 0, addr, len);
1391   } while (ret == -1 && errno == EINTR); /* Loop until not interrupted */
1392 #ifndef __VISAGECPP__
1393   UNMASK_SIGNAL();
1394 #endif
1395
1396   /* Frees memory allocated from _GAddress_translate_to */
1397   free(addr);
1398
1399   return ret;
1400 }
1401
1402 void GSocket::Detected_Read()
1403 {
1404   char c;
1405
1406   /* Safeguard against straggling call to Detected_Read */
1407   if (m_fd == INVALID_SOCKET)
1408   {
1409     return;
1410   }
1411
1412   /* If we have already detected a LOST event, then don't try
1413    * to do any further processing.
1414    */
1415   if ((m_detected & GSOCK_LOST_FLAG) != 0)
1416   {
1417     m_establishing = false;
1418
1419     CALL_CALLBACK(this, GSOCK_LOST);
1420     Shutdown();
1421     return;
1422   }
1423
1424   int num =  recv(m_fd, &c, 1, MSG_PEEK | GSOCKET_MSG_NOSIGNAL);
1425
1426   if (num > 0)
1427   {
1428     CALL_CALLBACK(this, GSOCK_INPUT);
1429   }
1430   else
1431   {
1432     if (m_server && m_stream)
1433     {
1434       CALL_CALLBACK(this, GSOCK_CONNECTION);
1435     }
1436     else
1437     {
1438       /* Do not throw a lost event in cases where the socket isn't really lost */
1439       if ((errno == EWOULDBLOCK) || (errno == EAGAIN) || (errno == EINTR))
1440       {
1441         CALL_CALLBACK(this, GSOCK_INPUT);
1442       }
1443       else
1444       {
1445         CALL_CALLBACK(this, GSOCK_LOST);
1446         Shutdown();
1447       }
1448     }
1449   }
1450 }
1451
1452 void GSocket::Detected_Write()
1453 {
1454   /* If we have already detected a LOST event, then don't try
1455    * to do any further processing.
1456    */
1457   if ((m_detected & GSOCK_LOST_FLAG) != 0)
1458   {
1459     m_establishing = false;
1460
1461     CALL_CALLBACK(this, GSOCK_LOST);
1462     Shutdown();
1463     return;
1464   }
1465
1466   if (m_establishing && !m_server)
1467   {
1468     int error;
1469     SOCKOPTLEN_T len = sizeof(error);
1470
1471     m_establishing = false;
1472
1473     getsockopt(m_fd, SOL_SOCKET, SO_ERROR, (char*)&error, &len);
1474
1475     if (error)
1476     {
1477       CALL_CALLBACK(this, GSOCK_LOST);
1478       Shutdown();
1479     }
1480     else
1481     {
1482       CALL_CALLBACK(this, GSOCK_CONNECTION);
1483       /* We have to fire this event by hand because CONNECTION (for clients)
1484        * and OUTPUT are internally the same and we just disabled CONNECTION
1485        * events with the above macro.
1486        */
1487       CALL_CALLBACK(this, GSOCK_OUTPUT);
1488     }
1489   }
1490   else
1491   {
1492     CALL_CALLBACK(this, GSOCK_OUTPUT);
1493   }
1494 }
1495
1496 /* Compatibility functions for GSocket */
1497 GSocket *GSocket_new(void)
1498 {
1499     GSocket *newsocket = new GSocket();
1500     if(newsocket->IsOk())
1501         return newsocket;
1502     delete newsocket;
1503     return NULL;
1504 }
1505
1506 /*
1507  * -------------------------------------------------------------------------
1508  * GAddress
1509  * -------------------------------------------------------------------------
1510  */
1511
1512 /* CHECK_ADDRESS verifies that the current address family is either
1513  * GSOCK_NOFAMILY or GSOCK_*family*, and if it is GSOCK_NOFAMILY, it
1514  * initalizes it to be a GSOCK_*family*. In other cases, it returns
1515  * an appropiate error code.
1516  *
1517  * CHECK_ADDRESS_RETVAL does the same but returning 'retval' on error.
1518  */
1519 #define CHECK_ADDRESS(address, family)                              \
1520 {                                                                   \
1521   if (address->m_family == GSOCK_NOFAMILY)                          \
1522     if (_GAddress_Init_##family(address) != GSOCK_NOERROR)          \
1523       return address->m_error;                                      \
1524   if (address->m_family != GSOCK_##family)                          \
1525   {                                                                 \
1526     address->m_error = GSOCK_INVADDR;                               \
1527     return GSOCK_INVADDR;                                           \
1528   }                                                                 \
1529 }
1530
1531 #define CHECK_ADDRESS_RETVAL(address, family, retval)               \
1532 {                                                                   \
1533   if (address->m_family == GSOCK_NOFAMILY)                          \
1534     if (_GAddress_Init_##family(address) != GSOCK_NOERROR)          \
1535       return retval;                                                \
1536   if (address->m_family != GSOCK_##family)                          \
1537   {                                                                 \
1538     address->m_error = GSOCK_INVADDR;                               \
1539     return retval;                                                  \
1540   }                                                                 \
1541 }
1542
1543
1544 GAddress *GAddress_new(void)
1545 {
1546   GAddress *address;
1547
1548   if ((address = (GAddress *) malloc(sizeof(GAddress))) == NULL)
1549     return NULL;
1550
1551   address->m_family  = GSOCK_NOFAMILY;
1552   address->m_addr    = NULL;
1553   address->m_len     = 0;
1554
1555   return address;
1556 }
1557
1558 GAddress *GAddress_copy(GAddress *address)
1559 {
1560   GAddress *addr2;
1561
1562   assert(address != NULL);
1563
1564   if ((addr2 = (GAddress *) malloc(sizeof(GAddress))) == NULL)
1565     return NULL;
1566
1567   memcpy(addr2, address, sizeof(GAddress));
1568
1569   if (address->m_addr && address->m_len > 0)
1570   {
1571     addr2->m_addr = (struct sockaddr *)malloc(addr2->m_len);
1572     if (addr2->m_addr == NULL)
1573     {
1574       free(addr2);
1575       return NULL;
1576     }
1577     memcpy(addr2->m_addr, address->m_addr, addr2->m_len);
1578   }
1579
1580   return addr2;
1581 }
1582
1583 void GAddress_destroy(GAddress *address)
1584 {
1585   assert(address != NULL);
1586
1587   if (address->m_addr)
1588     free(address->m_addr);
1589
1590   free(address);
1591 }
1592
1593 void GAddress_SetFamily(GAddress *address, GAddressType type)
1594 {
1595   assert(address != NULL);
1596
1597   address->m_family = type;
1598 }
1599
1600 GAddressType GAddress_GetFamily(GAddress *address)
1601 {
1602   assert(address != NULL);
1603
1604   return address->m_family;
1605 }
1606
1607 GSocketError _GAddress_translate_from(GAddress *address,
1608                                       struct sockaddr *addr, int len)
1609 {
1610   address->m_realfamily = addr->sa_family;
1611   switch (addr->sa_family)
1612   {
1613     case AF_INET:
1614       address->m_family = GSOCK_INET;
1615       break;
1616     case AF_UNIX:
1617       address->m_family = GSOCK_UNIX;
1618       break;
1619 #ifdef AF_INET6
1620     case AF_INET6:
1621       address->m_family = GSOCK_INET6;
1622       break;
1623 #endif
1624     default:
1625     {
1626       address->m_error = GSOCK_INVOP;
1627       return GSOCK_INVOP;
1628     }
1629   }
1630
1631   if (address->m_addr)
1632     free(address->m_addr);
1633
1634   address->m_len  = len;
1635   address->m_addr = (struct sockaddr *)malloc(len);
1636
1637   if (address->m_addr == NULL)
1638   {
1639     address->m_error = GSOCK_MEMERR;
1640     return GSOCK_MEMERR;
1641   }
1642   memcpy(address->m_addr, addr, len);
1643
1644   return GSOCK_NOERROR;
1645 }
1646
1647 GSocketError _GAddress_translate_to(GAddress *address,
1648                                     struct sockaddr **addr, int *len)
1649 {
1650   if (!address->m_addr)
1651   {
1652     address->m_error = GSOCK_INVADDR;
1653     return GSOCK_INVADDR;
1654   }
1655
1656   *len = address->m_len;
1657   *addr = (struct sockaddr *)malloc(address->m_len);
1658   if (*addr == NULL)
1659   {
1660     address->m_error = GSOCK_MEMERR;
1661     return GSOCK_MEMERR;
1662   }
1663
1664   memcpy(*addr, address->m_addr, address->m_len);
1665   return GSOCK_NOERROR;
1666 }
1667
1668 /*
1669  * -------------------------------------------------------------------------
1670  * Internet address family
1671  * -------------------------------------------------------------------------
1672  */
1673
1674 GSocketError _GAddress_Init_INET(GAddress *address)
1675 {
1676   address->m_len  = sizeof(struct sockaddr_in);
1677   address->m_addr = (struct sockaddr *) malloc(address->m_len);
1678   if (address->m_addr == NULL)
1679   {
1680     address->m_error = GSOCK_MEMERR;
1681     return GSOCK_MEMERR;
1682   }
1683
1684   address->m_family = GSOCK_INET;
1685   address->m_realfamily = PF_INET;
1686   ((struct sockaddr_in *)address->m_addr)->sin_family = AF_INET;
1687   ((struct sockaddr_in *)address->m_addr)->sin_addr.s_addr = INADDR_ANY;
1688
1689   return GSOCK_NOERROR;
1690 }
1691
1692 GSocketError GAddress_INET_SetHostName(GAddress *address, const char *hostname)
1693 {
1694   struct hostent *he;
1695   struct in_addr *addr;
1696
1697   assert(address != NULL);
1698
1699   CHECK_ADDRESS(address, INET);
1700
1701   addr = &(((struct sockaddr_in *)address->m_addr)->sin_addr);
1702
1703   /* If it is a numeric host name, convert it now */
1704 #if defined(HAVE_INET_ATON)
1705   if (inet_aton(hostname, addr) == 0)
1706   {
1707 #elif defined(HAVE_INET_ADDR)
1708   if ( (addr->s_addr = inet_addr(hostname)) == (in_addr_t)-1 )
1709   {
1710 #else
1711   /* Use gethostbyname by default */
1712 #ifndef __WXMAC__
1713   int val = 1;  /* VA doesn't like constants in conditional expressions */
1714   if (val)
1715 #endif
1716   {
1717 #endif
1718     struct in_addr *array_addr;
1719
1720     /* It is a real name, we solve it */
1721     if ((he = gethostbyname(hostname)) == NULL)
1722     {
1723       /* Reset to invalid address */
1724       addr->s_addr = INADDR_NONE;
1725       address->m_error = GSOCK_NOHOST;
1726       return GSOCK_NOHOST;
1727     }
1728     array_addr = (struct in_addr *) *(he->h_addr_list);
1729     addr->s_addr = array_addr[0].s_addr;
1730   }
1731   return GSOCK_NOERROR;
1732 }
1733
1734 GSocketError GAddress_INET_SetAnyAddress(GAddress *address)
1735 {
1736   return GAddress_INET_SetHostAddress(address, INADDR_ANY);
1737 }
1738
1739 GSocketError GAddress_INET_SetHostAddress(GAddress *address,
1740                                           unsigned long hostaddr)
1741 {
1742   struct in_addr *addr;
1743
1744   assert(address != NULL);
1745
1746   CHECK_ADDRESS(address, INET);
1747
1748   addr = &(((struct sockaddr_in *)address->m_addr)->sin_addr);
1749   addr->s_addr = htonl(hostaddr);
1750
1751   return GSOCK_NOERROR;
1752 }
1753
1754 GSocketError GAddress_INET_SetPortName(GAddress *address, const char *port,
1755                                        const char *protocol)
1756 {
1757   struct servent *se;
1758   struct sockaddr_in *addr;
1759
1760   assert(address != NULL);
1761   CHECK_ADDRESS(address, INET);
1762
1763   if (!port)
1764   {
1765     address->m_error = GSOCK_INVPORT;
1766     return GSOCK_INVPORT;
1767   }
1768
1769 #if defined(__WXPM__) && defined(__EMX__)
1770   se = getservbyname(port, (char*)protocol);
1771 #else
1772   se = getservbyname(port, protocol);
1773 #endif
1774   if (!se)
1775   {
1776     /* the cast to int suppresses compiler warnings about subscript having the
1777        type char */
1778     if (isdigit((int)port[0]))
1779     {
1780       int port_int;
1781
1782       port_int = atoi(port);
1783       addr = (struct sockaddr_in *)address->m_addr;
1784       addr->sin_port = htons(port_int);
1785       return GSOCK_NOERROR;
1786     }
1787
1788     address->m_error = GSOCK_INVPORT;
1789     return GSOCK_INVPORT;
1790   }
1791
1792   addr = (struct sockaddr_in *)address->m_addr;
1793   addr->sin_port = se->s_port;
1794
1795   return GSOCK_NOERROR;
1796 }
1797
1798 GSocketError GAddress_INET_SetPort(GAddress *address, unsigned short port)
1799 {
1800   struct sockaddr_in *addr;
1801
1802   assert(address != NULL);
1803   CHECK_ADDRESS(address, INET);
1804
1805   addr = (struct sockaddr_in *)address->m_addr;
1806   addr->sin_port = htons(port);
1807
1808   return GSOCK_NOERROR;
1809 }
1810
1811 GSocketError GAddress_INET_GetHostName(GAddress *address, char *hostname, size_t sbuf)
1812 {
1813   struct hostent *he;
1814   char *addr_buf;
1815   struct sockaddr_in *addr;
1816
1817   assert(address != NULL);
1818   CHECK_ADDRESS(address, INET);
1819
1820   addr = (struct sockaddr_in *)address->m_addr;
1821   addr_buf = (char *)&(addr->sin_addr);
1822
1823   he = gethostbyaddr(addr_buf, sizeof(addr->sin_addr), AF_INET);
1824   if (he == NULL)
1825   {
1826     address->m_error = GSOCK_NOHOST;
1827     return GSOCK_NOHOST;
1828   }
1829
1830   strncpy(hostname, he->h_name, sbuf);
1831
1832   return GSOCK_NOERROR;
1833 }
1834
1835 unsigned long GAddress_INET_GetHostAddress(GAddress *address)
1836 {
1837   struct sockaddr_in *addr;
1838
1839   assert(address != NULL);
1840   CHECK_ADDRESS_RETVAL(address, INET, 0);
1841
1842   addr = (struct sockaddr_in *)address->m_addr;
1843
1844   return ntohl(addr->sin_addr.s_addr);
1845 }
1846
1847 unsigned short GAddress_INET_GetPort(GAddress *address)
1848 {
1849   struct sockaddr_in *addr;
1850
1851   assert(address != NULL);
1852   CHECK_ADDRESS_RETVAL(address, INET, 0);
1853
1854   addr = (struct sockaddr_in *)address->m_addr;
1855   return ntohs(addr->sin_port);
1856 }
1857
1858 /*
1859  * -------------------------------------------------------------------------
1860  * Unix address family
1861  * -------------------------------------------------------------------------
1862  */
1863
1864 #ifndef __VISAGECPP__
1865 GSocketError _GAddress_Init_UNIX(GAddress *address)
1866 {
1867   address->m_len  = sizeof(struct sockaddr_un);
1868   address->m_addr = (struct sockaddr *)malloc(address->m_len);
1869   if (address->m_addr == NULL)
1870   {
1871     address->m_error = GSOCK_MEMERR;
1872     return GSOCK_MEMERR;
1873   }
1874
1875   address->m_family = GSOCK_UNIX;
1876   address->m_realfamily = PF_UNIX;
1877   ((struct sockaddr_un *)address->m_addr)->sun_family = AF_UNIX;
1878   ((struct sockaddr_un *)address->m_addr)->sun_path[0] = 0;
1879
1880   return GSOCK_NOERROR;
1881 }
1882
1883 #define UNIX_SOCK_PATHLEN (sizeof(addr->sun_path)/sizeof(addr->sun_path[0]))
1884
1885 GSocketError GAddress_UNIX_SetPath(GAddress *address, const char *path)
1886 {
1887   struct sockaddr_un *addr;
1888
1889   assert(address != NULL);
1890
1891   CHECK_ADDRESS(address, UNIX);
1892
1893   addr = ((struct sockaddr_un *)address->m_addr);
1894   strncpy(addr->sun_path, path, UNIX_SOCK_PATHLEN);
1895   addr->sun_path[UNIX_SOCK_PATHLEN - 1] = '\0';
1896
1897   return GSOCK_NOERROR;
1898 }
1899
1900 GSocketError GAddress_UNIX_GetPath(GAddress *address, char *path, size_t sbuf)
1901 {
1902   struct sockaddr_un *addr;
1903
1904   assert(address != NULL);
1905   CHECK_ADDRESS(address, UNIX);
1906
1907   addr = (struct sockaddr_un *)address->m_addr;
1908
1909   strncpy(path, addr->sun_path, sbuf);
1910
1911   return GSOCK_NOERROR;
1912 }
1913 #endif  /* !defined(__VISAGECPP__) */
1914 #endif  /* wxUSE_SOCKETS || defined(__GSOCKET_STANDALONE__) */
1915