src/unix/gsocket.cpp

   1 /* -------------------------------------------------------------------------
   2  * Project:     GSocket (Generic Socket) for WX
   3  * Name:        gsocket.c
   4  * Copyright:   (c) Guilhem Lavaux
   5  * Licence:     wxWindows Licence
   6  * Authors:     David Elliott (C++ conversion, maintainer)
   7  *              Guilhem Lavaux,
   8  *              Guillermo Rodriguez Garcia <guille@iies.es>
   9  * Purpose:     GSocket main Unix and OS/2 file
  10  * Licence:     The wxWindows licence
  11  * CVSID:       $Id$
  12  * -------------------------------------------------------------------------
  13  */
  14
  15 /*
  16  * PLEASE don't put C++ comments here - this is a C source file.
  17  */
  18
  19 #if defined(__WATCOMC__)
  20 #include "wx/wxprec.h"
  21 #include <errno.h>
  22 #include <nerrno.h>
  23 #endif
  24
  25 #ifndef __GSOCKET_STANDALONE__
  26 #include "wx/setup.h"
  27 #endif
  28
  29 #ifndef WXUNUSED
  30 #define WXUNUSED(x)
  31 #endif
  32
  33 #if defined(__VISAGECPP__)
  34 /* Seems to be needed by Visual Age C++, though I don't see how it manages
  35    to not break on including a C++ header into a plain C source file      */
  36 #include "wx/defs.h"
  37 #define BSD_SELECT /* use Berkley Sockets select */
  38 #endif
  39
  40 #if wxUSE_SOCKETS || defined(__GSOCKET_STANDALONE__)
  41
  42 #include <assert.h>
  43 #include <sys/types.h>
  44 #ifdef __VISAGECPP__
  45 #include <string.h>
  46 #include <sys/time.h>
  47 #include <types.h>
  48 #include <netinet/in.h>
  49 #endif
  50 #include <netdb.h>
  51 #include <sys/ioctl.h>
  52
  53 #ifdef __VMS__
  54 #include <socket.h>
  55 struct sockaddr_un
  56 {
  57     u_char  sun_len;        /* sockaddr len including null */
  58     u_char  sun_family;     /* AF_UNIX */
  59     char    sun_path[108];  /* path name (gag) */
  60 };
  61 #else
  62 #include <sys/socket.h>
  63 #include <sys/un.h>
  64 #endif
  65
  66 #ifndef __VISAGECPP__
  67 #include <sys/time.h>
  68 #include <netinet/in.h>
  69 #include <arpa/inet.h>
  70 #include <errno.h>
  71 #include <string.h>
  72 #include <unistd.h>
  73 #else
  74 #include <nerrno.h>
  75 #  if __IBMCPP__ < 400
  76 #include <machine/endian.h>
  77 #include <socket.h>
  78 #include <ioctl.h>
  79 #include <select.h>
  80 #include <unistd.h>
  81
  82 #define EBADF   SOCEBADF
  83
  84 #    ifdef min
  85 #    undef min
  86 #    endif
  87 #  else
  88 #include <sys/socket.h>
  89 #include <sys/ioctl.h>
  90 #include <sys/select.h>
  91
  92 #define close(a) soclose(a)
  93 #define select(a,b,c,d,e) bsdselect(a,b,c,d,e)
  94 int _System bsdselect(int,
  95                       struct fd_set *,
  96                       struct fd_set *,
  97                       struct fd_set *,
  98                       struct timeval *);
  99 int _System soclose(int);
 100 #  endif
 101 #endif
 102 #ifdef __EMX__
 103 #include <sys/select.h>
 104 #endif
 105
 106 #include <stdio.h>
 107 #include <stdlib.h>
 108 #include <stddef.h>
 109 #include <ctype.h>
 110 #ifdef sun
 111 #  include <sys/filio.h>
 112 #endif
 113 #ifdef sgi
 114 #  include <bstring.h>
 115 #endif
 116 #ifdef _AIX
 117 #  include <strings.h>
 118 #endif
 119 #include <signal.h>
 120
 121 #ifndef SOCKLEN_T
 122
 123 #ifdef VMS
 124 #  define SOCKLEN_T unsigned int
 125 #else
 126 #  ifdef __GLIBC__
 127 #    if __GLIBC__ == 2
 128 #      define SOCKLEN_T socklen_t
 129 #    endif
 130 #  elif defined(__WXMAC__)
 131 #    define SOCKLEN_T socklen_t
 132 #  else
 133 #    define SOCKLEN_T int
 134 #  endif
 135 #endif
 136
 137 #endif /* SOCKLEN_T */
 138
 139 #ifndef SOCKOPTLEN_T
 140 #define SOCKOPTLEN_T SOCKLEN_T
 141 #endif
 142
 143 /*
 144  * MSW defines this, Unices don't.
 145  */
 146 #ifndef INVALID_SOCKET
 147 #define INVALID_SOCKET -1
 148 #endif
 149
 150 /* UnixWare reportedly needs this for FIONBIO definition */
 151 #ifdef __UNIXWARE__
 152 #include <sys/filio.h>
 153 #endif
 154
 155 /*
 156  * INADDR_BROADCAST is identical to INADDR_NONE which is not defined
 157  * on all systems. INADDR_BROADCAST should be fine to indicate an error.
 158  */
 159 #ifndef INADDR_NONE
 160 #define INADDR_NONE INADDR_BROADCAST
 161 #endif
 162
 163 #if defined(__VISAGECPP__) || defined(__WATCOMC__)
 164
 165     #define MASK_SIGNAL() {
 166     #define UNMASK_SIGNAL() }
 167
 168 #else
 169
 170     #define MASK_SIGNAL()                       \
 171     {                                           \
 172         void (*old_handler)(int);               \
 173                                                 \
 174         old_handler = signal(SIGPIPE, SIG_IGN);
 175
 176     #define UNMASK_SIGNAL()                     \
 177         signal(SIGPIPE, old_handler);           \
 178     }
 179
 180 #endif
 181
 182 /* If a SIGPIPE is issued by a socket call on a remotely closed socket,
 183    the program will "crash" unless it explicitly handles the SIGPIPE.
 184    By using MSG_NOSIGNAL, the SIGPIPE is suppressed. Later, we will
 185    use SO_NOSIGPIPE (if available), the BSD equivalent. */
 186 #ifdef MSG_NOSIGNAL
 187 #  define GSOCKET_MSG_NOSIGNAL MSG_NOSIGNAL
 188 #else /* MSG_NOSIGNAL not available (FreeBSD including OS X) */
 189 #  define GSOCKET_MSG_NOSIGNAL 0
 190 #endif /* MSG_NOSIGNAL */
 191
 192 #ifndef __GSOCKET_STANDALONE__
 193 #  include "wx/unix/gsockunx.h"
 194 #  include "wx/gsocket.h"
 195 #else
 196 #  include "gsockunx.h"
 197 #  include "gsocket.h"
 198 #endif /* __GSOCKET_STANDALONE__ */
 199
 200 /* debugging helpers */
 201 #ifdef __GSOCKET_DEBUG__
 202 #  define GSocket_Debug(args) printf args
 203 #else
 204 #  define GSocket_Debug(args)
 205 #endif /* __GSOCKET_DEBUG__ */
 206
 207 /* Table of GUI-related functions. We must call them indirectly because
 208  * of wxBase and GUI separation: */
 209
 210 static GSocketGUIFunctionsTable *gs_gui_functions;
 211
 212 class GSocketGUIFunctionsTableNull: public GSocketGUIFunctionsTable
 213 {
 214 public:
 215     virtual bool OnInit();
 216     virtual void OnExit();
 217     virtual bool CanUseEventLoop();
 218     virtual bool Init_Socket(GSocket *socket);
 219     virtual void Destroy_Socket(GSocket *socket);
 220     virtual void Install_Callback(GSocket *socket, GSocketEvent event);
 221     virtual void Uninstall_Callback(GSocket *socket, GSocketEvent event);
 222     virtual void Enable_Events(GSocket *socket);
 223     virtual void Disable_Events(GSocket *socket);
 224 };
 225
 226 bool GSocketGUIFunctionsTableNull::OnInit()
 227 {   return true; }
 228 void GSocketGUIFunctionsTableNull::OnExit()
 229 {}
 230 bool GSocketGUIFunctionsTableNull::CanUseEventLoop()
 231 {   return false; }
 232 bool GSocketGUIFunctionsTableNull::Init_Socket(GSocket *WXUNUSED(socket))
 233 {   return true; }
 234 void GSocketGUIFunctionsTableNull::Destroy_Socket(GSocket *WXUNUSED(socket))
 235 {}
 236 void GSocketGUIFunctionsTableNull::Install_Callback(GSocket *WXUNUSED(socket), GSocketEvent WXUNUSED(event))
 237 {}
 238 void GSocketGUIFunctionsTableNull::Uninstall_Callback(GSocket *WXUNUSED(socket), GSocketEvent WXUNUSED(event))
 239 {}
 240 void GSocketGUIFunctionsTableNull::Enable_Events(GSocket *WXUNUSED(socket))
 241 {}
 242 void GSocketGUIFunctionsTableNull::Disable_Events(GSocket *WXUNUSED(socket))
 243 {}
 244 /* Global initialisers */
 245
 246 void GSocket_SetGUIFunctions(GSocketGUIFunctionsTable *guifunc)
 247 {
 248   gs_gui_functions = guifunc;
 249 }
 250
 251 int GSocket_Init(void)
 252 {
 253   if (!gs_gui_functions)
 254   {
 255     static GSocketGUIFunctionsTableNull table;
 256     gs_gui_functions = &table;
 257   }
 258   if ( !gs_gui_functions->OnInit() )
 259     return 0;
 260   return 1;
 261 }
 262
 263 void GSocket_Cleanup(void)
 264 {
 265   if (gs_gui_functions)
 266   {
 267       gs_gui_functions->OnExit();
 268   }
 269 }
 270
 271 /* Constructors / Destructors for GSocket */
 272
 273 GSocket::GSocket()
 274 {
 275   int i;
 276
 277   m_fd                  = INVALID_SOCKET;
 278   for (i=0;i<GSOCK_MAX_EVENT;i++)
 279   {
 280     m_cbacks[i]         = NULL;
 281   }
 282   m_detected            = 0;
 283   m_local               = NULL;
 284   m_peer                = NULL;
 285   m_error               = GSOCK_NOERROR;
 286   m_server              = false;
 287   m_stream              = true;
 288   m_gui_dependent       = NULL;
 289   m_non_blocking        = false;
 290   m_reusable            = false;
 291   m_timeout             = 10*60*1000;
 292                                 /* 10 minutes * 60 sec * 1000 millisec */
 293   m_establishing        = false;
 294
 295   assert(gs_gui_functions);
 296   /* Per-socket GUI-specific initialization */
 297   m_ok = gs_gui_functions->Init_Socket(this);
 298 }
 299
 300 void GSocket::Close()
 301 {
 302     gs_gui_functions->Disable_Events(this);
 303     /* gsockosx.c calls CFSocketInvalidate which closes the socket for us */
 304 #if !(defined(__DARWIN__) && (defined(__WXMAC__) || defined(__WXCOCOA__)))
 305     close(m_fd);
 306 #endif
 307     m_fd = INVALID_SOCKET;
 308 }
 309
 310 GSocket::~GSocket()
 311 {
 312   assert(this);
 313
 314   /* Check that the socket is really shutdowned */
 315   if (m_fd != INVALID_SOCKET)
 316     Shutdown();
 317
 318   /* Per-socket GUI-specific cleanup */
 319   gs_gui_functions->Destroy_Socket(this);
 320
 321   /* Destroy private addresses */
 322   if (m_local)
 323     GAddress_destroy(m_local);
 324
 325   if (m_peer)
 326     GAddress_destroy(m_peer);
 327 }
 328
 329 /* GSocket_Shutdown:
 330  *  Disallow further read/write operations on this socket, close
 331  *  the fd and disable all callbacks.
 332  */
 333 void GSocket::Shutdown()
 334 {
 335   int evt;
 336
 337   assert(this);
 338
 339   /* If socket has been created, shutdown it */
 340   if (m_fd != INVALID_SOCKET)
 341   {
 342     shutdown(m_fd, 2);
 343     Close();
 344   }
 345
 346   /* Disable GUI callbacks */
 347   for (evt = 0; evt < GSOCK_MAX_EVENT; evt++)
 348     m_cbacks[evt] = NULL;
 349
 350   m_detected = GSOCK_LOST_FLAG;
 351 }
 352
 353 /* Address handling */
 354
 355 /* GSocket_SetLocal:
 356  * GSocket_GetLocal:
 357  * GSocket_SetPeer:
 358  * GSocket_GetPeer:
 359  *  Set or get the local or peer address for this socket. The 'set'
 360  *  functions return GSOCK_NOERROR on success, an error code otherwise.
 361  *  The 'get' functions return a pointer to a GAddress object on success,
 362  *  or NULL otherwise, in which case they set the error code of the
 363  *  corresponding GSocket.
 364  *
 365  *  Error codes:
 366  *    GSOCK_INVSOCK - the socket is not valid.
 367  *    GSOCK_INVADDR - the address is not valid.
 368  */
 369 GSocketError GSocket::SetLocal(GAddress *address)
 370 {
 371   assert(this);
 372
 373   /* the socket must be initialized, or it must be a server */
 374   if ((m_fd != INVALID_SOCKET && !m_server))
 375   {
 376     m_error = GSOCK_INVSOCK;
 377     return GSOCK_INVSOCK;
 378   }
 379
 380   /* check address */
 381   if (address == NULL || address->m_family == GSOCK_NOFAMILY)
 382   {
 383     m_error = GSOCK_INVADDR;
 384     return GSOCK_INVADDR;
 385   }
 386
 387   if (m_local)
 388     GAddress_destroy(m_local);
 389
 390   m_local = GAddress_copy(address);
 391
 392   return GSOCK_NOERROR;
 393 }
 394
 395 GSocketError GSocket::SetPeer(GAddress *address)
 396 {
 397   assert(this);
 398
 399   /* check address */
 400   if (address == NULL || address->m_family == GSOCK_NOFAMILY)
 401   {
 402     m_error = GSOCK_INVADDR;
 403     return GSOCK_INVADDR;
 404   }
 405
 406   if (m_peer)
 407     GAddress_destroy(m_peer);
 408
 409   m_peer = GAddress_copy(address);
 410
 411   return GSOCK_NOERROR;
 412 }
 413
 414 GAddress *GSocket::GetLocal()
 415 {
 416   GAddress *address;
 417   struct sockaddr addr;
 418   SOCKLEN_T size = sizeof(addr);
 419   GSocketError err;
 420
 421   assert(this);
 422
 423   /* try to get it from the m_local var first */
 424   if (m_local)
 425     return GAddress_copy(m_local);
 426
 427   /* else, if the socket is initialized, try getsockname */
 428   if (m_fd == INVALID_SOCKET)
 429   {
 430     m_error = GSOCK_INVSOCK;
 431     return NULL;
 432   }
 433
 434   if (getsockname(m_fd, &addr, (SOCKLEN_T *) &size) < 0)
 435   {
 436     m_error = GSOCK_IOERR;
 437     return NULL;
 438   }
 439
 440   /* got a valid address from getsockname, create a GAddress object */
 441   address = GAddress_new();
 442   if (address == NULL)
 443   {
 444     m_error = GSOCK_MEMERR;
 445     return NULL;
 446   }
 447
 448   err = _GAddress_translate_from(address, &addr, size);
 449   if (err != GSOCK_NOERROR)
 450   {
 451     GAddress_destroy(address);
 452     m_error = err;
 453     return NULL;
 454   }
 455
 456   return address;
 457 }
 458
 459 GAddress *GSocket::GetPeer()
 460 {
 461   assert(this);
 462
 463   /* try to get it from the m_peer var */
 464   if (m_peer)
 465     return GAddress_copy(m_peer);
 466
 467   return NULL;
 468 }
 469
 470 /* Server specific parts */
 471
 472 /* GSocket_SetServer:
 473  *  Sets up this socket as a server. The local address must have been
 474  *  set with GSocket_SetLocal() before GSocket_SetServer() is called.
 475  *  Returns GSOCK_NOERROR on success, one of the following otherwise:
 476  *
 477  *  Error codes:
 478  *    GSOCK_INVSOCK - the socket is in use.
 479  *    GSOCK_INVADDR - the local address has not been set.
 480  *    GSOCK_IOERR   - low-level error.
 481  */
 482 GSocketError GSocket::SetServer()
 483 {
 484   int arg = 1;
 485
 486   assert(this);
 487
 488   /* must not be in use */
 489   if (m_fd != INVALID_SOCKET)
 490   {
 491     m_error = GSOCK_INVSOCK;
 492     return GSOCK_INVSOCK;
 493   }
 494
 495   /* the local addr must have been set */
 496   if (!m_local)
 497   {
 498     m_error = GSOCK_INVADDR;
 499     return GSOCK_INVADDR;
 500   }
 501
 502   /* Initialize all fields */
 503   m_stream   = true;
 504   m_server   = true;
 505
 506   /* Create the socket */
 507   m_fd = socket(m_local->m_realfamily, SOCK_STREAM, 0);
 508
 509   if (m_fd == INVALID_SOCKET)
 510   {
 511     m_error = GSOCK_IOERR;
 512     return GSOCK_IOERR;
 513   }
 514
 515   /* FreeBSD variants can't use MSG_NOSIGNAL, and instead use a socket option */
 516 #ifdef SO_NOSIGPIPE
 517   setsockopt(m_fd, SOL_SOCKET, SO_NOSIGPIPE, (const char*)&arg, sizeof(u_long));
 518 #endif
 519
 520   ioctl(m_fd, FIONBIO, &arg);
 521   gs_gui_functions->Enable_Events(this);
 522
 523   /* allow a socket to re-bind if the socket is in the TIME_WAIT
 524      state after being previously closed.
 525    */
 526   if (m_reusable)
 527     setsockopt(m_fd, SOL_SOCKET, SO_REUSEADDR, (const char*)&arg, sizeof(u_long));
 528
 529   /* Bind to the local address,
 530    * retrieve the actual address bound,
 531    * and listen up to 5 connections.
 532    */
 533   if ((bind(m_fd, m_local->m_addr, m_local->m_len) != 0) ||
 534       (getsockname(m_fd,
 535                    m_local->m_addr,
 536                    (SOCKLEN_T *) &m_local->m_len) != 0) ||
 537       (listen(m_fd, 5) != 0))
 538   {
 539     Close();
 540     m_error = GSOCK_IOERR;
 541     return GSOCK_IOERR;
 542   }
 543
 544   return GSOCK_NOERROR;
 545 }
 546
 547 /* GSocket_WaitConnection:
 548  *  Waits for an incoming client connection. Returns a pointer to
 549  *  a GSocket object, or NULL if there was an error, in which case
 550  *  the last error field will be updated for the calling GSocket.
 551  *
 552  *  Error codes (set in the calling GSocket)
 553  *    GSOCK_INVSOCK    - the socket is not valid or not a server.
 554  *    GSOCK_TIMEDOUT   - timeout, no incoming connections.
 555  *    GSOCK_WOULDBLOCK - the call would block and the socket is nonblocking.
 556  *    GSOCK_MEMERR     - couldn't allocate memory.
 557  *    GSOCK_IOERR      - low-level error.
 558  */
 559 GSocket *GSocket::WaitConnection()
 560 {
 561   struct sockaddr from;
 562   SOCKLEN_T fromlen = sizeof(from);
 563   GSocket *connection;
 564   GSocketError err;
 565   int arg = 1;
 566
 567   assert(this);
 568
 569   /* If the socket has already been created, we exit immediately */
 570   if (m_fd == INVALID_SOCKET || !m_server)
 571   {
 572     m_error = GSOCK_INVSOCK;
 573     return NULL;
 574   }
 575
 576   /* Create a GSocket object for the new connection */
 577   connection = GSocket_new();
 578
 579   if (!connection)
 580   {
 581     m_error = GSOCK_MEMERR;
 582     return NULL;
 583   }
 584
 585   /* Wait for a connection (with timeout) */
 586   if (Input_Timeout() == GSOCK_TIMEDOUT)
 587   {
 588     delete connection;
 589     /* m_error set by _GSocket_Input_Timeout */
 590     return NULL;
 591   }
 592
 593   connection->m_fd = accept(m_fd, &from, (SOCKLEN_T *) &fromlen);
 594
 595   /* Reenable CONNECTION events */
 596   Enable(GSOCK_CONNECTION);
 597
 598   if (connection->m_fd == INVALID_SOCKET)
 599   {
 600     if (errno == EWOULDBLOCK)
 601       m_error = GSOCK_WOULDBLOCK;
 602     else
 603       m_error = GSOCK_IOERR;
 604
 605     delete connection;
 606     return NULL;
 607   }
 608
 609   /* Initialize all fields */
 610   connection->m_server   = false;
 611   connection->m_stream   = true;
 612
 613   /* Setup the peer address field */
 614   connection->m_peer = GAddress_new();
 615   if (!connection->m_peer)
 616   {
 617     delete connection;
 618     m_error = GSOCK_MEMERR;
 619     return NULL;
 620   }
 621   err = _GAddress_translate_from(connection->m_peer, &from, fromlen);
 622   if (err != GSOCK_NOERROR)
 623   {
 624     delete connection;
 625     m_error = err;
 626     return NULL;
 627   }
 628 #if defined(__EMX__) || defined(__VISAGECPP__)
 629   ioctl(connection->m_fd, FIONBIO, (char*)&arg, sizeof(arg));
 630 #else
 631   ioctl(connection->m_fd, FIONBIO, &arg);
 632 #endif
 633   gs_gui_functions->Enable_Events(connection);
 634
 635   return connection;
 636 }
 637
 638 bool GSocket::SetReusable()
 639 {
 640     /* socket must not be null, and must not be in use/already bound */
 641     if (this && m_fd == INVALID_SOCKET) {
 642         m_reusable = true;
 643         return true;
 644     }
 645     return false;
 646 }
 647
 648 /* Client specific parts */
 649
 650 /* GSocket_Connect:
 651  *  For stream (connection oriented) sockets, GSocket_Connect() tries
 652  *  to establish a client connection to a server using the peer address
 653  *  as established with GSocket_SetPeer(). Returns GSOCK_NOERROR if the
 654  *  connection has been successfully established, or one of the error
 655  *  codes listed below. Note that for nonblocking sockets, a return
 656  *  value of GSOCK_WOULDBLOCK doesn't mean a failure. The connection
 657  *  request can be completed later; you should use GSocket_Select()
 658  *  to poll for GSOCK_CONNECTION | GSOCK_LOST, or wait for the
 659  *  corresponding asynchronous events.
 660  *
 661  *  For datagram (non connection oriented) sockets, GSocket_Connect()
 662  *  just sets the peer address established with GSocket_SetPeer() as
 663  *  default destination.
 664  *
 665  *  Error codes:
 666  *    GSOCK_INVSOCK    - the socket is in use or not valid.
 667  *    GSOCK_INVADDR    - the peer address has not been established.
 668  *    GSOCK_TIMEDOUT   - timeout, the connection failed.
 669  *    GSOCK_WOULDBLOCK - connection in progress (nonblocking sockets only)
 670  *    GSOCK_MEMERR     - couldn't allocate memory.
 671  *    GSOCK_IOERR      - low-level error.
 672  */
 673 GSocketError GSocket::Connect(GSocketStream stream)
 674 {
 675   int err, ret;
 676   int arg = 1;
 677
 678   assert(this);
 679
 680   /* Enable CONNECTION events (needed for nonblocking connections) */
 681   Enable(GSOCK_CONNECTION);
 682
 683   if (m_fd != INVALID_SOCKET)
 684   {
 685     m_error = GSOCK_INVSOCK;
 686     return GSOCK_INVSOCK;
 687   }
 688
 689   if (!m_peer)
 690   {
 691     m_error = GSOCK_INVADDR;
 692     return GSOCK_INVADDR;
 693   }
 694
 695   /* Streamed or dgram socket? */
 696   m_stream   = (stream == GSOCK_STREAMED);
 697   m_server   = false;
 698   m_establishing = false;
 699
 700   /* Create the socket */
 701   m_fd = socket(m_peer->m_realfamily,
 702                      m_stream? SOCK_STREAM : SOCK_DGRAM, 0);
 703
 704   if (m_fd == INVALID_SOCKET)
 705   {
 706     m_error = GSOCK_IOERR;
 707     return GSOCK_IOERR;
 708   }
 709
 710   /* FreeBSD variants can't use MSG_NOSIGNAL, and instead use a socket option */
 711 #ifdef SO_NOSIGPIPE
 712   setsockopt(m_fd, SOL_SOCKET, SO_NOSIGPIPE, (const char*)&arg, sizeof(u_long));
 713 #endif
 714
 715 #if defined(__EMX__) || defined(__VISAGECPP__)
 716   ioctl(m_fd, FIONBIO, (char*)&arg, sizeof(arg));
 717 #else
 718   ioctl(m_fd, FIONBIO, &arg);
 719 #endif
 720
 721   /* Connect it to the peer address, with a timeout (see below) */
 722   ret = connect(m_fd, m_peer->m_addr, m_peer->m_len);
 723
 724   /* We only call Enable_Events if we know e aren't shutting down the socket */
 725
 726   if (m_non_blocking)
 727   {
 728     gs_gui_functions->Enable_Events(this);
 729   }
 730
 731   if (ret == -1)
 732   {
 733     err = errno;
 734
 735     /* If connect failed with EINPROGRESS and the GSocket object
 736      * is in blocking mode, we select() for the specified timeout
 737      * checking for writability to see if the connection request
 738      * completes.
 739      */
 740     if ((err == EINPROGRESS) && (!m_non_blocking))
 741     {
 742       if (Output_Timeout() == GSOCK_TIMEDOUT)
 743       {
 744         Close();
 745         /* m_error is set in _GSocket_Output_Timeout */
 746         return GSOCK_TIMEDOUT;
 747       }
 748       else
 749       {
 750         int error;
 751         SOCKOPTLEN_T len = sizeof(error);
 752
 753         getsockopt(m_fd, SOL_SOCKET, SO_ERROR, (char*) &error, &len);
 754
 755         gs_gui_functions->Enable_Events(this);
 756
 757         if (!error)
 758           return GSOCK_NOERROR;
 759       }
 760     }
 761
 762     /* If connect failed with EINPROGRESS and the GSocket object
 763      * is set to nonblocking, we set m_error to GSOCK_WOULDBLOCK
 764      * (and return GSOCK_WOULDBLOCK) but we don't close the socket;
 765      * this way if the connection completes, a GSOCK_CONNECTION
 766      * event will be generated, if enabled.
 767      */
 768     if ((err == EINPROGRESS) && (m_non_blocking))
 769     {
 770       m_establishing = true;
 771       m_error = GSOCK_WOULDBLOCK;
 772       return GSOCK_WOULDBLOCK;
 773     }
 774
 775     /* If connect failed with an error other than EINPROGRESS,
 776      * then the call to GSocket_Connect has failed.
 777      */
 778     Close();
 779     m_error = GSOCK_IOERR;
 780     return GSOCK_IOERR;
 781   }
 782
 783   return GSOCK_NOERROR;
 784 }
 785
 786 /* Datagram sockets */
 787
 788 /* GSocket_SetNonOriented:
 789  *  Sets up this socket as a non-connection oriented (datagram) socket.
 790  *  Before using this function, the local address must have been set
 791  *  with GSocket_SetLocal(), or the call will fail. Returns GSOCK_NOERROR
 792  *  on success, or one of the following otherwise.
 793  *
 794  *  Error codes:
 795  *    GSOCK_INVSOCK - the socket is in use.
 796  *    GSOCK_INVADDR - the local address has not been set.
 797  *    GSOCK_IOERR   - low-level error.
 798  */
 799 GSocketError GSocket::SetNonOriented()
 800 {
 801   int arg = 1;
 802
 803   assert(this);
 804
 805   if (m_fd != INVALID_SOCKET)
 806   {
 807     m_error = GSOCK_INVSOCK;
 808     return GSOCK_INVSOCK;
 809   }
 810
 811   if (!m_local)
 812   {
 813     m_error = GSOCK_INVADDR;
 814     return GSOCK_INVADDR;
 815   }
 816
 817   /* Initialize all fields */
 818   m_stream   = false;
 819   m_server   = false;
 820
 821   /* Create the socket */
 822   m_fd = socket(m_local->m_realfamily, SOCK_DGRAM, 0);
 823
 824   if (m_fd == INVALID_SOCKET)
 825   {
 826     m_error = GSOCK_IOERR;
 827     return GSOCK_IOERR;
 828   }
 829 #if defined(__EMX__) || defined(__VISAGECPP__)
 830   ioctl(m_fd, FIONBIO, (char*)&arg, sizeof(arg));
 831 #else
 832   ioctl(m_fd, FIONBIO, &arg);
 833 #endif
 834   gs_gui_functions->Enable_Events(this);
 835
 836   /* Bind to the local address,
 837    * and retrieve the actual address bound.
 838    */
 839   if ((bind(m_fd, m_local->m_addr, m_local->m_len) != 0) ||
 840       (getsockname(m_fd,
 841                    m_local->m_addr,
 842                    (SOCKLEN_T *) &m_local->m_len) != 0))
 843   {
 844     Close();
 845     m_error = GSOCK_IOERR;
 846     return GSOCK_IOERR;
 847   }
 848
 849   return GSOCK_NOERROR;
 850 }
 851
 852 /* Generic IO */
 853
 854 /* Like recv(), send(), ... */
 855 int GSocket::Read(char *buffer, int size)
 856 {
 857   int ret;
 858
 859   assert(this);
 860
 861   if (m_fd == INVALID_SOCKET || m_server)
 862   {
 863     m_error = GSOCK_INVSOCK;
 864     return -1;
 865   }
 866
 867   /* Disable events during query of socket status */
 868   Disable(GSOCK_INPUT);
 869
 870   /* If the socket is blocking, wait for data (with a timeout) */
 871   if (Input_Timeout() == GSOCK_TIMEDOUT)
 872     /* We no longer return here immediately, otherwise socket events would not be re-enabled! */
 873     ret = -1;
 874   else {
 875     /* Read the data */
 876     if (m_stream)
 877       ret = Recv_Stream(buffer, size);
 878     else
 879       ret = Recv_Dgram(buffer, size);
 880   }
 881
 882   if (ret == -1)
 883   {
 884     if ((errno == EWOULDBLOCK) || (errno == EAGAIN))
 885       m_error = GSOCK_WOULDBLOCK;
 886     else
 887       m_error = GSOCK_IOERR;
 888   }
 889
 890   /* Enable events again now that we are done processing */
 891   Enable(GSOCK_INPUT);
 892
 893   return ret;
 894 }
 895
 896 int GSocket::Write(const char *buffer, int size)
 897 {
 898   int ret;
 899
 900   assert(this);
 901
 902   GSocket_Debug(( "GSocket_Write #1, size %d\n", size ));
 903
 904   if (m_fd == INVALID_SOCKET || m_server)
 905   {
 906     m_error = GSOCK_INVSOCK;
 907     return -1;
 908   }
 909
 910   GSocket_Debug(( "GSocket_Write #2, size %d\n", size ));
 911
 912   /* If the socket is blocking, wait for writability (with a timeout) */
 913   if (Output_Timeout() == GSOCK_TIMEDOUT)
 914     return -1;
 915
 916   GSocket_Debug(( "GSocket_Write #3, size %d\n", size ));
 917
 918   /* Write the data */
 919   if (m_stream)
 920     ret = Send_Stream(buffer, size);
 921   else
 922     ret = Send_Dgram(buffer, size);
 923
 924   GSocket_Debug(( "GSocket_Write #4, size %d\n", size ));
 925
 926   if (ret == -1)
 927   {
 928     if ((errno == EWOULDBLOCK) || (errno == EAGAIN))
 929     {
 930       m_error = GSOCK_WOULDBLOCK;
 931       GSocket_Debug(( "GSocket_Write error WOULDBLOCK\n" ));
 932     }
 933     else
 934     {
 935       m_error = GSOCK_IOERR;
 936       GSocket_Debug(( "GSocket_Write error IOERR\n" ));
 937     }
 938
 939     /* Only reenable OUTPUT events after an error (just like WSAAsyncSelect
 940      * in MSW). Once the first OUTPUT event is received, users can assume
 941      * that the socket is writable until a read operation fails. Only then
 942      * will further OUTPUT events be posted.
 943      */
 944     Enable(GSOCK_OUTPUT);
 945     return -1;
 946   }
 947
 948   GSocket_Debug(( "GSocket_Write #5, size %d ret %d\n", size, ret ));
 949
 950   return ret;
 951 }
 952
 953 /* GSocket_Select:
 954  *  Polls the socket to determine its status. This function will
 955  *  check for the events specified in the 'flags' parameter, and
 956  *  it will return a mask indicating which operations can be
 957  *  performed. This function won't block, regardless of the
 958  *  mode (blocking | nonblocking) of the socket.
 959  */
 960 GSocketEventFlags GSocket::Select(GSocketEventFlags flags)
 961 {
 962   if (!gs_gui_functions->CanUseEventLoop())
 963   {
 964
 965     GSocketEventFlags result = 0;
 966     fd_set readfds;
 967     fd_set writefds;
 968     fd_set exceptfds;
 969     struct timeval tv;
 970
 971     assert(this);
 972
 973     /* Do not use a static struct, Linux can garble it */
 974     tv.tv_sec = m_timeout / 1000;
 975     tv.tv_usec = (m_timeout % 1000) * 1000;
 976
 977     FD_ZERO(&readfds);
 978     FD_ZERO(&writefds);
 979     FD_ZERO(&exceptfds);
 980     FD_SET(m_fd, &readfds);
 981     if (flags & GSOCK_OUTPUT_FLAG || flags & GSOCK_CONNECTION_FLAG)
 982       FD_SET(m_fd, &writefds);
 983     FD_SET(m_fd, &exceptfds);
 984
 985     /* Check 'sticky' CONNECTION flag first */
 986     result |= (GSOCK_CONNECTION_FLAG & m_detected);
 987
 988     /* If we have already detected a LOST event, then don't try
 989      * to do any further processing.
 990      */
 991     if ((m_detected & GSOCK_LOST_FLAG) != 0)
 992     {
 993       m_establishing = false;
 994
 995       return (GSOCK_LOST_FLAG & flags);
 996     }
 997
 998     /* Try select now */
 999     if (select(m_fd + 1, &readfds, &writefds, &exceptfds, &tv) <= 0)
1000     {
1001       /* What to do here? */
1002       return (result & flags);
1003     }
1004
1005     /* Check for readability */
1006     if (FD_ISSET(m_fd, &readfds))
1007     {
1008       char c;
1009
1010       int num = recv(m_fd, &c, 1, MSG_PEEK | GSOCKET_MSG_NOSIGNAL);
1011
1012       if (num > 0)
1013       {
1014         result |= GSOCK_INPUT_FLAG;
1015       }
1016       else
1017       {
1018         if (m_server && m_stream)
1019         {
1020           result |= GSOCK_CONNECTION_FLAG;
1021           m_detected |= GSOCK_CONNECTION_FLAG;
1022         }
1023         else if ((errno != EWOULDBLOCK) && (errno != EAGAIN) && (errno != EINTR))
1024         {
1025           m_detected = GSOCK_LOST_FLAG;
1026           m_establishing = false;
1027
1028           /* LOST event: Abort any further processing */
1029           return (GSOCK_LOST_FLAG & flags);
1030         }
1031       }
1032     }
1033
1034     /* Check for writability */
1035     if (FD_ISSET(m_fd, &writefds))
1036     {
1037       if (m_establishing && !m_server)
1038       {
1039         int error;
1040         SOCKOPTLEN_T len = sizeof(error);
1041
1042         m_establishing = false;
1043
1044         getsockopt(m_fd, SOL_SOCKET, SO_ERROR, (char*)&error, &len);
1045
1046         if (error)
1047         {
1048           m_detected = GSOCK_LOST_FLAG;
1049
1050           /* LOST event: Abort any further processing */
1051           return (GSOCK_LOST_FLAG & flags);
1052         }
1053         else
1054         {
1055           result |= GSOCK_CONNECTION_FLAG;
1056           m_detected |= GSOCK_CONNECTION_FLAG;
1057         }
1058       }
1059       else
1060       {
1061         result |= GSOCK_OUTPUT_FLAG;
1062       }
1063     }
1064
1065     /* Check for exceptions and errors (is this useful in Unices?) */
1066     if (FD_ISSET(m_fd, &exceptfds))
1067     {
1068       m_establishing = false;
1069       m_detected = GSOCK_LOST_FLAG;
1070
1071       /* LOST event: Abort any further processing */
1072       return (GSOCK_LOST_FLAG & flags);
1073     }
1074
1075     return (result & flags);
1076
1077   }
1078   else
1079   {
1080
1081     assert(this);
1082     return flags & m_detected;
1083
1084   }
1085 }
1086
1087 /* Flags */
1088
1089 /* GSocket_SetNonBlocking:
1090  *  Sets the socket to non-blocking mode. All IO calls will return
1091  *  immediately.
1092  */
1093 void GSocket::SetNonBlocking(bool non_block)
1094 {
1095   assert(this);
1096
1097   GSocket_Debug( ("GSocket_SetNonBlocking: %d\n", (int)non_block) );
1098
1099   m_non_blocking = non_block;
1100 }
1101
1102 /* GSocket_SetTimeout:
1103  *  Sets the timeout for blocking calls. Time is expressed in
1104  *  milliseconds.
1105  */
1106 void GSocket::SetTimeout(unsigned long millisec)
1107 {
1108   assert(this);
1109
1110   m_timeout = millisec;
1111 }
1112
1113 /* GSocket_GetError:
1114  *  Returns the last error occurred for this socket. Note that successful
1115  *  operations do not clear this back to GSOCK_NOERROR, so use it only
1116  *  after an error.
1117  */
1118 GSocketError WXDLLIMPEXP_NET GSocket::GetError()
1119 {
1120   assert(this);
1121
1122   return m_error;
1123 }
1124
1125 /* Callbacks */
1126
1127 /* GSOCK_INPUT:
1128  *   There is data to be read in the input buffer. If, after a read
1129  *   operation, there is still data available, the callback function will
1130  *   be called again.
1131  * GSOCK_OUTPUT:
1132  *   The socket is available for writing. That is, the next write call
1133  *   won't block. This event is generated only once, when the connection is
1134  *   first established, and then only if a call failed with GSOCK_WOULDBLOCK,
1135  *   when the output buffer empties again. This means that the app should
1136  *   assume that it can write since the first OUTPUT event, and no more
1137  *   OUTPUT events will be generated unless an error occurs.
1138  * GSOCK_CONNECTION:
1139  *   Connection successfully established, for client sockets, or incoming
1140  *   client connection, for server sockets. Wait for this event (also watch
1141  *   out for GSOCK_LOST) after you issue a nonblocking GSocket_Connect() call.
1142  * GSOCK_LOST:
1143  *   The connection is lost (or a connection request failed); this could
1144  *   be due to a failure, or due to the peer closing it gracefully.
1145  */
1146
1147 /* GSocket_SetCallback:
1148  *  Enables the callbacks specified by 'flags'. Note that 'flags'
1149  *  may be a combination of flags OR'ed toghether, so the same
1150  *  callback function can be made to accept different events.
1151  *  The callback function must have the following prototype:
1152  *
1153  *  void function(GSocket *socket, GSocketEvent event, char *cdata)
1154  */
1155 void GSocket::SetCallback(GSocketEventFlags flags,
1156                          GSocketCallback callback, char *cdata)
1157 {
1158   int count;
1159
1160   assert(this);
1161
1162   for (count = 0; count < GSOCK_MAX_EVENT; count++)
1163   {
1164     if ((flags & (1 << count)) != 0)
1165     {
1166       m_cbacks[count] = callback;
1167       m_data[count] = cdata;
1168     }
1169   }
1170 }
1171
1172 /* GSocket_UnsetCallback:
1173  *  Disables all callbacks specified by 'flags', which may be a
1174  *  combination of flags OR'ed toghether.
1175  */
1176 void GSocket::UnsetCallback(GSocketEventFlags flags)
1177 {
1178   int count;
1179
1180   assert(this);
1181
1182   for (count = 0; count < GSOCK_MAX_EVENT; count++)
1183   {
1184     if ((flags & (1 << count)) != 0)
1185     {
1186       m_cbacks[count] = NULL;
1187       m_data[count] = NULL;
1188     }
1189   }
1190 }
1191
1192 GSocketError GSocket::GetSockOpt(int level, int optname,
1193                                 void *optval, int *optlen)
1194 {
1195     if (getsockopt(m_fd, level, optname, (char*)optval, (SOCKOPTLEN_T*)optlen) == 0)
1196     {
1197         return GSOCK_NOERROR;
1198     }
1199     return GSOCK_OPTERR;
1200 }
1201
1202 GSocketError GSocket::SetSockOpt(int level, int optname,
1203                                 const void *optval, int optlen)
1204 {
1205     if (setsockopt(m_fd, level, optname, (const char*)optval, optlen) == 0)
1206     {
1207         return GSOCK_NOERROR;
1208     }
1209     return GSOCK_OPTERR;
1210 }
1211
1212 #define CALL_CALLBACK(socket, event) {                                  \
1213   socket->Disable(event);                                               \
1214   if (socket->m_cbacks[event])                                          \
1215     socket->m_cbacks[event](socket, event, socket->m_data[event]);      \
1216 }
1217
1218
1219 void GSocket::Enable(GSocketEvent event)
1220 {
1221   m_detected &= ~(1 << event);
1222   gs_gui_functions->Install_Callback(this, event);
1223 }
1224
1225 void GSocket::Disable(GSocketEvent event)
1226 {
1227   m_detected |= (1 << event);
1228   gs_gui_functions->Uninstall_Callback(this, event);
1229 }
1230
1231 /* _GSocket_Input_Timeout:
1232  *  For blocking sockets, wait until data is available or
1233  *  until timeout ellapses.
1234  */
1235 GSocketError GSocket::Input_Timeout()
1236 {
1237   struct timeval tv;
1238   fd_set readfds;
1239   int ret;
1240
1241   /* Linux select() will overwrite the struct on return */
1242   tv.tv_sec  = (m_timeout / 1000);
1243   tv.tv_usec = (m_timeout % 1000) * 1000;
1244
1245   if (!m_non_blocking)
1246   {
1247     FD_ZERO(&readfds);
1248     FD_SET(m_fd, &readfds);
1249     ret = select(m_fd + 1, &readfds, NULL, NULL, &tv);
1250     if (ret == 0)
1251     {
1252       GSocket_Debug(( "GSocket_Input_Timeout, select returned 0\n" ));
1253       m_error = GSOCK_TIMEDOUT;
1254       return GSOCK_TIMEDOUT;
1255     }
1256     if (ret == -1)
1257     {
1258       GSocket_Debug(( "GSocket_Input_Timeout, select returned -1\n" ));
1259       if (errno == EBADF) { GSocket_Debug(( "Invalid file descriptor\n" )); }
1260       if (errno == EINTR) { GSocket_Debug(( "A non blocked signal was caught\n" )); }
1261       if (errno == EINVAL) { GSocket_Debug(( "The highest number descriptor is negative\n" )); }
1262       if (errno == ENOMEM) { GSocket_Debug(( "Not enough memory\n" )); }
1263       m_error = GSOCK_TIMEDOUT;
1264       return GSOCK_TIMEDOUT;
1265     }
1266   }
1267   return GSOCK_NOERROR;
1268 }
1269
1270 /* _GSocket_Output_Timeout:
1271  *  For blocking sockets, wait until data can be sent without
1272  *  blocking or until timeout ellapses.
1273  */
1274 GSocketError GSocket::Output_Timeout()
1275 {
1276   struct timeval tv;
1277   fd_set writefds;
1278   int ret;
1279
1280   /* Linux select() will overwrite the struct on return */
1281   tv.tv_sec  = (m_timeout / 1000);
1282   tv.tv_usec = (m_timeout % 1000) * 1000;
1283
1284   GSocket_Debug( ("m_non_blocking has: %d\n", (int)m_non_blocking) );
1285
1286   if (!m_non_blocking)
1287   {
1288     FD_ZERO(&writefds);
1289     FD_SET(m_fd, &writefds);
1290     ret = select(m_fd + 1, NULL, &writefds, NULL, &tv);
1291     if (ret == 0)
1292     {
1293       GSocket_Debug(( "GSocket_Output_Timeout, select returned 0\n" ));
1294       m_error = GSOCK_TIMEDOUT;
1295       return GSOCK_TIMEDOUT;
1296     }
1297     if (ret == -1)
1298     {
1299       GSocket_Debug(( "GSocket_Output_Timeout, select returned -1\n" ));
1300       if (errno == EBADF) { GSocket_Debug(( "Invalid file descriptor\n" )); }
1301       if (errno == EINTR) { GSocket_Debug(( "A non blocked signal was caught\n" )); }
1302       if (errno == EINVAL) { GSocket_Debug(( "The highest number descriptor is negative\n" )); }
1303       if (errno == ENOMEM) { GSocket_Debug(( "Not enough memory\n" )); }
1304       m_error = GSOCK_TIMEDOUT;
1305       return GSOCK_TIMEDOUT;
1306     }
1307     if ( ! FD_ISSET(m_fd, &writefds) ) {
1308         GSocket_Debug(( "GSocket_Output_Timeout is buggy!\n" ));
1309     }
1310     else {
1311         GSocket_Debug(( "GSocket_Output_Timeout seems correct\n" ));
1312     }
1313   }
1314   else
1315   {
1316     GSocket_Debug(( "GSocket_Output_Timeout, didn't try select!\n" ));
1317   }
1318
1319   return GSOCK_NOERROR;
1320 }
1321
1322 int GSocket::Recv_Stream(char *buffer, int size)
1323 {
1324   int ret;
1325   do
1326   {
1327     ret = recv(m_fd, buffer, size, GSOCKET_MSG_NOSIGNAL);
1328   } while (ret == -1 && errno == EINTR); /* Loop until not interrupted */
1329   return ret;
1330 }
1331
1332 int GSocket::Recv_Dgram(char *buffer, int size)
1333 {
1334   struct sockaddr from;
1335   SOCKLEN_T fromlen = sizeof(from);
1336   int ret;
1337   GSocketError err;
1338
1339   fromlen = sizeof(from);
1340
1341   do
1342   {
1343     ret = recvfrom(m_fd, buffer, size, 0, &from, (SOCKLEN_T *) &fromlen);
1344   } while (ret == -1 && errno == EINTR); /* Loop until not interrupted */
1345
1346   if (ret == -1)
1347     return -1;
1348
1349   /* Translate a system address into a GSocket address */
1350   if (!m_peer)
1351   {
1352     m_peer = GAddress_new();
1353     if (!m_peer)
1354     {
1355       m_error = GSOCK_MEMERR;
1356       return -1;
1357     }
1358   }
1359   err = _GAddress_translate_from(m_peer, &from, fromlen);
1360   if (err != GSOCK_NOERROR)
1361   {
1362     GAddress_destroy(m_peer);
1363     m_peer  = NULL;
1364     m_error = err;
1365     return -1;
1366   }
1367
1368   return ret;
1369 }
1370
1371 int GSocket::Send_Stream(const char *buffer, int size)
1372 {
1373   int ret;
1374
1375   MASK_SIGNAL();
1376
1377   do
1378   {
1379     ret = send(m_fd, (char *)buffer, size, GSOCKET_MSG_NOSIGNAL);
1380   } while (ret == -1 && errno == EINTR); /* Loop until not interrupted */
1381
1382   UNMASK_SIGNAL();
1383
1384   return ret;
1385 }
1386
1387 int GSocket::Send_Dgram(const char *buffer, int size)
1388 {
1389   struct sockaddr *addr;
1390   int len, ret;
1391   GSocketError err;
1392
1393   if (!m_peer)
1394   {
1395     m_error = GSOCK_INVADDR;
1396     return -1;
1397   }
1398
1399   err = _GAddress_translate_to(m_peer, &addr, &len);
1400   if (err != GSOCK_NOERROR)
1401   {
1402     m_error = err;
1403     return -1;
1404   }
1405
1406   MASK_SIGNAL();
1407
1408   do
1409   {
1410     ret = sendto(m_fd, (char *)buffer, size, 0, addr, len);
1411   } while (ret == -1 && errno == EINTR); /* Loop until not interrupted */
1412
1413   UNMASK_SIGNAL();
1414
1415   /* Frees memory allocated from _GAddress_translate_to */
1416   free(addr);
1417
1418   return ret;
1419 }
1420
1421 void GSocket::Detected_Read()
1422 {
1423   char c;
1424
1425   /* Safeguard against straggling call to Detected_Read */
1426   if (m_fd == INVALID_SOCKET)
1427   {
1428     return;
1429   }
1430
1431   /* If we have already detected a LOST event, then don't try
1432    * to do any further processing.
1433    */
1434   if ((m_detected & GSOCK_LOST_FLAG) != 0)
1435   {
1436     m_establishing = false;
1437
1438     CALL_CALLBACK(this, GSOCK_LOST);
1439     Shutdown();
1440     return;
1441   }
1442
1443   int num =  recv(m_fd, &c, 1, MSG_PEEK | GSOCKET_MSG_NOSIGNAL);
1444
1445   if (num > 0)
1446   {
1447     CALL_CALLBACK(this, GSOCK_INPUT);
1448   }
1449   else
1450   {
1451     if (m_server && m_stream)
1452     {
1453       CALL_CALLBACK(this, GSOCK_CONNECTION);
1454     }
1455     else
1456     {
1457       /* Do not throw a lost event in cases where the socket isn't really lost */
1458       if ((errno == EWOULDBLOCK) || (errno == EAGAIN) || (errno == EINTR))
1459       {
1460         CALL_CALLBACK(this, GSOCK_INPUT);
1461       }
1462       else
1463       {
1464         CALL_CALLBACK(this, GSOCK_LOST);
1465         Shutdown();
1466       }
1467     }
1468   }
1469 }
1470
1471 void GSocket::Detected_Write()
1472 {
1473   /* If we have already detected a LOST event, then don't try
1474    * to do any further processing.
1475    */
1476   if ((m_detected & GSOCK_LOST_FLAG) != 0)
1477   {
1478     m_establishing = false;
1479
1480     CALL_CALLBACK(this, GSOCK_LOST);
1481     Shutdown();
1482     return;
1483   }
1484
1485   if (m_establishing && !m_server)
1486   {
1487     int error;
1488     SOCKOPTLEN_T len = sizeof(error);
1489
1490     m_establishing = false;
1491
1492     getsockopt(m_fd, SOL_SOCKET, SO_ERROR, (char*)&error, &len);
1493
1494     if (error)
1495     {
1496       CALL_CALLBACK(this, GSOCK_LOST);
1497       Shutdown();
1498     }
1499     else
1500     {
1501       CALL_CALLBACK(this, GSOCK_CONNECTION);
1502       /* We have to fire this event by hand because CONNECTION (for clients)
1503        * and OUTPUT are internally the same and we just disabled CONNECTION
1504        * events with the above macro.
1505        */
1506       CALL_CALLBACK(this, GSOCK_OUTPUT);
1507     }
1508   }
1509   else
1510   {
1511     CALL_CALLBACK(this, GSOCK_OUTPUT);
1512   }
1513 }
1514
1515 /* Compatibility functions for GSocket */
1516 GSocket *GSocket_new(void)
1517 {
1518     GSocket *newsocket = new GSocket();
1519     if(newsocket->IsOk())
1520         return newsocket;
1521     delete newsocket;
1522     return NULL;
1523 }
1524
1525 /*
1526  * -------------------------------------------------------------------------
1527  * GAddress
1528  * -------------------------------------------------------------------------
1529  */
1530
1531 /* CHECK_ADDRESS verifies that the current address family is either
1532  * GSOCK_NOFAMILY or GSOCK_*family*, and if it is GSOCK_NOFAMILY, it
1533  * initalizes it to be a GSOCK_*family*. In other cases, it returns
1534  * an appropiate error code.
1535  *
1536  * CHECK_ADDRESS_RETVAL does the same but returning 'retval' on error.
1537  */
1538 #define CHECK_ADDRESS(address, family)                              \
1539 {                                                                   \
1540   if (address->m_family == GSOCK_NOFAMILY)                          \
1541     if (_GAddress_Init_##family(address) != GSOCK_NOERROR)          \
1542       return address->m_error;                                      \
1543   if (address->m_family != GSOCK_##family)                          \
1544   {                                                                 \
1545     address->m_error = GSOCK_INVADDR;                               \
1546     return GSOCK_INVADDR;                                           \
1547   }                                                                 \
1548 }
1549
1550 #define CHECK_ADDRESS_RETVAL(address, family, retval)               \
1551 {                                                                   \
1552   if (address->m_family == GSOCK_NOFAMILY)                          \
1553     if (_GAddress_Init_##family(address) != GSOCK_NOERROR)          \
1554       return retval;                                                \
1555   if (address->m_family != GSOCK_##family)                          \
1556   {                                                                 \
1557     address->m_error = GSOCK_INVADDR;                               \
1558     return retval;                                                  \
1559   }                                                                 \
1560 }
1561
1562
1563 GAddress *GAddress_new(void)
1564 {
1565   GAddress *address;
1566
1567   if ((address = (GAddress *) malloc(sizeof(GAddress))) == NULL)
1568     return NULL;
1569
1570   address->m_family  = GSOCK_NOFAMILY;
1571   address->m_addr    = NULL;
1572   address->m_len     = 0;
1573
1574   return address;
1575 }
1576
1577 GAddress *GAddress_copy(GAddress *address)
1578 {
1579   GAddress *addr2;
1580
1581   assert(address != NULL);
1582
1583   if ((addr2 = (GAddress *) malloc(sizeof(GAddress))) == NULL)
1584     return NULL;
1585
1586   memcpy(addr2, address, sizeof(GAddress));
1587
1588   if (address->m_addr && address->m_len > 0)
1589   {
1590     addr2->m_addr = (struct sockaddr *)malloc(addr2->m_len);
1591     if (addr2->m_addr == NULL)
1592     {
1593       free(addr2);
1594       return NULL;
1595     }
1596     memcpy(addr2->m_addr, address->m_addr, addr2->m_len);
1597   }
1598
1599   return addr2;
1600 }
1601
1602 void GAddress_destroy(GAddress *address)
1603 {
1604   assert(address != NULL);
1605
1606   if (address->m_addr)
1607     free(address->m_addr);
1608
1609   free(address);
1610 }
1611
1612 void GAddress_SetFamily(GAddress *address, GAddressType type)
1613 {
1614   assert(address != NULL);
1615
1616   address->m_family = type;
1617 }
1618
1619 GAddressType GAddress_GetFamily(GAddress *address)
1620 {
1621   assert(address != NULL);
1622
1623   return address->m_family;
1624 }
1625
1626 GSocketError _GAddress_translate_from(GAddress *address,
1627                                       struct sockaddr *addr, int len)
1628 {
1629   address->m_realfamily = addr->sa_family;
1630   switch (addr->sa_family)
1631   {
1632     case AF_INET:
1633       address->m_family = GSOCK_INET;
1634       break;
1635     case AF_UNIX:
1636       address->m_family = GSOCK_UNIX;
1637       break;
1638 #ifdef AF_INET6
1639     case AF_INET6:
1640       address->m_family = GSOCK_INET6;
1641       break;
1642 #endif
1643     default:
1644     {
1645       address->m_error = GSOCK_INVOP;
1646       return GSOCK_INVOP;
1647     }
1648   }
1649
1650   if (address->m_addr)
1651     free(address->m_addr);
1652
1653   address->m_len  = len;
1654   address->m_addr = (struct sockaddr *)malloc(len);
1655
1656   if (address->m_addr == NULL)
1657   {
1658     address->m_error = GSOCK_MEMERR;
1659     return GSOCK_MEMERR;
1660   }
1661   memcpy(address->m_addr, addr, len);
1662
1663   return GSOCK_NOERROR;
1664 }
1665
1666 GSocketError _GAddress_translate_to(GAddress *address,
1667                                     struct sockaddr **addr, int *len)
1668 {
1669   if (!address->m_addr)
1670   {
1671     address->m_error = GSOCK_INVADDR;
1672     return GSOCK_INVADDR;
1673   }
1674
1675   *len = address->m_len;
1676   *addr = (struct sockaddr *)malloc(address->m_len);
1677   if (*addr == NULL)
1678   {
1679     address->m_error = GSOCK_MEMERR;
1680     return GSOCK_MEMERR;
1681   }
1682
1683   memcpy(*addr, address->m_addr, address->m_len);
1684   return GSOCK_NOERROR;
1685 }
1686
1687 /*
1688  * -------------------------------------------------------------------------
1689  * Internet address family
1690  * -------------------------------------------------------------------------
1691  */
1692
1693 GSocketError _GAddress_Init_INET(GAddress *address)
1694 {
1695   address->m_len  = sizeof(struct sockaddr_in);
1696   address->m_addr = (struct sockaddr *) malloc(address->m_len);
1697   if (address->m_addr == NULL)
1698   {
1699     address->m_error = GSOCK_MEMERR;
1700     return GSOCK_MEMERR;
1701   }
1702
1703   address->m_family = GSOCK_INET;
1704   address->m_realfamily = PF_INET;
1705   ((struct sockaddr_in *)address->m_addr)->sin_family = AF_INET;
1706   ((struct sockaddr_in *)address->m_addr)->sin_addr.s_addr = INADDR_ANY;
1707
1708   return GSOCK_NOERROR;
1709 }
1710
1711 GSocketError GAddress_INET_SetHostName(GAddress *address, const char *hostname)
1712 {
1713   struct hostent *he;
1714   struct in_addr *addr;
1715
1716   assert(address != NULL);
1717
1718   CHECK_ADDRESS(address, INET);
1719
1720   addr = &(((struct sockaddr_in *)address->m_addr)->sin_addr);
1721
1722   /* If it is a numeric host name, convert it now */
1723 #if defined(HAVE_INET_ATON)
1724   if (inet_aton(hostname, addr) == 0)
1725   {
1726 #elif defined(HAVE_INET_ADDR)
1727   if ( (addr->s_addr = inet_addr(hostname)) == (unsigned)-1 )
1728   {
1729 #else
1730   /* Use gethostbyname by default */
1731 #ifndef __WXMAC__
1732   int val = 1;  /* VA doesn't like constants in conditional expressions */
1733   if (val)
1734 #endif
1735   {
1736 #endif
1737     struct in_addr *array_addr;
1738
1739     /* It is a real name, we solve it */
1740     if ((he = gethostbyname(hostname)) == NULL)
1741     {
1742       /* Reset to invalid address */
1743       addr->s_addr = INADDR_NONE;
1744       address->m_error = GSOCK_NOHOST;
1745       return GSOCK_NOHOST;
1746     }
1747     array_addr = (struct in_addr *) *(he->h_addr_list);
1748     addr->s_addr = array_addr[0].s_addr;
1749   }
1750   return GSOCK_NOERROR;
1751 }
1752
1753 GSocketError GAddress_INET_SetAnyAddress(GAddress *address)
1754 {
1755   return GAddress_INET_SetHostAddress(address, INADDR_ANY);
1756 }
1757
1758 GSocketError GAddress_INET_SetHostAddress(GAddress *address,
1759                                           unsigned long hostaddr)
1760 {
1761   struct in_addr *addr;
1762
1763   assert(address != NULL);
1764
1765   CHECK_ADDRESS(address, INET);
1766
1767   addr = &(((struct sockaddr_in *)address->m_addr)->sin_addr);
1768   addr->s_addr = htonl(hostaddr);
1769
1770   return GSOCK_NOERROR;
1771 }
1772
1773 GSocketError GAddress_INET_SetPortName(GAddress *address, const char *port,
1774                                        const char *protocol)
1775 {
1776   struct servent *se;
1777   struct sockaddr_in *addr;
1778
1779   assert(address != NULL);
1780   CHECK_ADDRESS(address, INET);
1781
1782   if (!port)
1783   {
1784     address->m_error = GSOCK_INVPORT;
1785     return GSOCK_INVPORT;
1786   }
1787
1788 #if defined(__WXPM__) && defined(__EMX__)
1789   se = getservbyname(port, (char*)protocol);
1790 #else
1791   se = getservbyname(port, protocol);
1792 #endif
1793   if (!se)
1794   {
1795     /* the cast to int suppresses compiler warnings about subscript having the
1796        type char */
1797     if (isdigit((int)port[0]))
1798     {
1799       int port_int;
1800
1801       port_int = atoi(port);
1802       addr = (struct sockaddr_in *)address->m_addr;
1803       addr->sin_port = htons(port_int);
1804       return GSOCK_NOERROR;
1805     }
1806
1807     address->m_error = GSOCK_INVPORT;
1808     return GSOCK_INVPORT;
1809   }
1810
1811   addr = (struct sockaddr_in *)address->m_addr;
1812   addr->sin_port = se->s_port;
1813
1814   return GSOCK_NOERROR;
1815 }
1816
1817 GSocketError GAddress_INET_SetPort(GAddress *address, unsigned short port)
1818 {
1819   struct sockaddr_in *addr;
1820
1821   assert(address != NULL);
1822   CHECK_ADDRESS(address, INET);
1823
1824   addr = (struct sockaddr_in *)address->m_addr;
1825   addr->sin_port = htons(port);
1826
1827   return GSOCK_NOERROR;
1828 }
1829
1830 GSocketError GAddress_INET_GetHostName(GAddress *address, char *hostname, size_t sbuf)
1831 {
1832   struct hostent *he;
1833   char *addr_buf;
1834   struct sockaddr_in *addr;
1835
1836   assert(address != NULL);
1837   CHECK_ADDRESS(address, INET);
1838
1839   addr = (struct sockaddr_in *)address->m_addr;
1840   addr_buf = (char *)&(addr->sin_addr);
1841
1842   he = gethostbyaddr(addr_buf, sizeof(addr->sin_addr), AF_INET);
1843   if (he == NULL)
1844   {
1845     address->m_error = GSOCK_NOHOST;
1846     return GSOCK_NOHOST;
1847   }
1848
1849   strncpy(hostname, he->h_name, sbuf);
1850
1851   return GSOCK_NOERROR;
1852 }
1853
1854 unsigned long GAddress_INET_GetHostAddress(GAddress *address)
1855 {
1856   struct sockaddr_in *addr;
1857
1858   assert(address != NULL);
1859   CHECK_ADDRESS_RETVAL(address, INET, 0);
1860
1861   addr = (struct sockaddr_in *)address->m_addr;
1862
1863   return ntohl(addr->sin_addr.s_addr);
1864 }
1865
1866 unsigned short GAddress_INET_GetPort(GAddress *address)
1867 {
1868   struct sockaddr_in *addr;
1869
1870   assert(address != NULL);
1871   CHECK_ADDRESS_RETVAL(address, INET, 0);
1872
1873   addr = (struct sockaddr_in *)address->m_addr;
1874   return ntohs(addr->sin_port);
1875 }
1876
1877 /*
1878  * -------------------------------------------------------------------------
1879  * Unix address family
1880  * -------------------------------------------------------------------------
1881  */
1882
1883 #ifndef __VISAGECPP__
1884 GSocketError _GAddress_Init_UNIX(GAddress *address)
1885 {
1886   address->m_len  = sizeof(struct sockaddr_un);
1887   address->m_addr = (struct sockaddr *)malloc(address->m_len);
1888   if (address->m_addr == NULL)
1889   {
1890     address->m_error = GSOCK_MEMERR;
1891     return GSOCK_MEMERR;
1892   }
1893
1894   address->m_family = GSOCK_UNIX;
1895   address->m_realfamily = PF_UNIX;
1896   ((struct sockaddr_un *)address->m_addr)->sun_family = AF_UNIX;
1897   ((struct sockaddr_un *)address->m_addr)->sun_path[0] = 0;
1898
1899   return GSOCK_NOERROR;
1900 }
1901
1902 #define UNIX_SOCK_PATHLEN (sizeof(addr->sun_path)/sizeof(addr->sun_path[0]))
1903
1904 GSocketError GAddress_UNIX_SetPath(GAddress *address, const char *path)
1905 {
1906   struct sockaddr_un *addr;
1907
1908   assert(address != NULL);
1909
1910   CHECK_ADDRESS(address, UNIX);
1911
1912   addr = ((struct sockaddr_un *)address->m_addr);
1913   strncpy(addr->sun_path, path, UNIX_SOCK_PATHLEN);
1914   addr->sun_path[UNIX_SOCK_PATHLEN - 1] = '\0';
1915
1916   return GSOCK_NOERROR;
1917 }
1918
1919 GSocketError GAddress_UNIX_GetPath(GAddress *address, char *path, size_t sbuf)
1920 {
1921   struct sockaddr_un *addr;
1922
1923   assert(address != NULL);
1924   CHECK_ADDRESS(address, UNIX);
1925
1926   addr = (struct sockaddr_un *)address->m_addr;
1927
1928   strncpy(path, addr->sun_path, sbuf);
1929
1930   return GSOCK_NOERROR;
1931 }
1932 #endif  /* !defined(__VISAGECPP__) */
1933 #endif  /* wxUSE_SOCKETS || defined(__GSOCKET_STANDALONE__) */