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 #if defined(__WATCOMC__)
  16 #include "wx/wxprec.h"
  17 #include <errno.h>
  18 #include <nerrno.h>
  19 #endif
  20
  21 #ifndef __GSOCKET_STANDALONE__
  22 #include "wx/defs.h"
  23 #endif
  24
  25 #if defined(__VISAGECPP__)
  26 #define BSD_SELECT /* use Berkeley Sockets select */
  27 #endif
  28
  29 #if wxUSE_SOCKETS || defined(__GSOCKET_STANDALONE__)
  30
  31 #include <assert.h>
  32 #include <sys/types.h>
  33 #ifdef __VISAGECPP__
  34 #include <string.h>
  35 #include <sys/time.h>
  36 #include <types.h>
  37 #include <netinet/in.h>
  38 #endif
  39 #include <netdb.h>
  40 #include <sys/ioctl.h>
  41
  42 #ifdef HAVE_SYS_SELECT_H
  43 #   include <sys/select.h>
  44 #endif
  45
  46 #ifdef __VMS__
  47 #include <socket.h>
  48 struct sockaddr_un
  49 {
  50     u_char  sun_len;        /* sockaddr len including null */
  51     u_char  sun_family;     /* AF_UNIX */
  52     char    sun_path[108];  /* path name (gag) */
  53 };
  54 #else
  55 #include <sys/socket.h>
  56 #include <sys/un.h>
  57 #endif
  58
  59 #ifndef __VISAGECPP__
  60 #include <sys/time.h>
  61 #include <netinet/in.h>
  62 #include <arpa/inet.h>
  63 #include <errno.h>
  64 #include <string.h>
  65 #include <unistd.h>
  66 #else
  67 #include <nerrno.h>
  68 #  if __IBMCPP__ < 400
  69 #include <machine/endian.h>
  70 #include <socket.h>
  71 #include <ioctl.h>
  72 #include <select.h>
  73 #include <unistd.h>
  74
  75 #define EBADF   SOCEBADF
  76
  77 #    ifdef min
  78 #    undef min
  79 #    endif
  80 #  else
  81 #include <sys/socket.h>
  82 #include <sys/ioctl.h>
  83 #include <sys/select.h>
  84
  85 #define close(a) soclose(a)
  86 #define select(a,b,c,d,e) bsdselect(a,b,c,d,e)
  87 int _System bsdselect(int,
  88                       struct fd_set *,
  89                       struct fd_set *,
  90                       struct fd_set *,
  91                       struct timeval *);
  92 int _System soclose(int);
  93 #  endif
  94 #endif
  95 #ifdef __EMX__
  96 #include <sys/select.h>
  97 #endif
  98
  99 #include <stdio.h>
 100 #include <stdlib.h>
 101 #include <stddef.h>
 102 #include <ctype.h>
 103 #ifdef sun
 104 #  include <sys/filio.h>
 105 #endif
 106 #ifdef sgi
 107 #  include <bstring.h>
 108 #endif
 109 #ifdef _AIX
 110 #  include <strings.h>
 111 #endif
 112 #include <signal.h>
 113
 114 #ifndef WX_SOCKLEN_T
 115
 116 #ifdef VMS
 117 #  define WX_SOCKLEN_T unsigned int
 118 #else
 119 #  ifdef __GLIBC__
 120 #    if __GLIBC__ == 2
 121 #      define WX_SOCKLEN_T socklen_t
 122 #    endif
 123 #  elif defined(__WXMAC__)
 124 #    define WX_SOCKLEN_T socklen_t
 125 #  else
 126 #    define WX_SOCKLEN_T int
 127 #  endif
 128 #endif
 129
 130 #endif /* SOCKLEN_T */
 131
 132 #ifndef SOCKOPTLEN_T
 133 #define SOCKOPTLEN_T WX_SOCKLEN_T
 134 #endif
 135
 136 /*
 137  * MSW defines this, Unices don't.
 138  */
 139 #ifndef INVALID_SOCKET
 140 #define INVALID_SOCKET -1
 141 #endif
 142
 143 /* UnixWare reportedly needs this for FIONBIO definition */
 144 #ifdef __UNIXWARE__
 145 #include <sys/filio.h>
 146 #endif
 147
 148 /*
 149  * INADDR_BROADCAST is identical to INADDR_NONE which is not defined
 150  * on all systems. INADDR_BROADCAST should be fine to indicate an error.
 151  */
 152 #ifndef INADDR_NONE
 153 #define INADDR_NONE INADDR_BROADCAST
 154 #endif
 155
 156 #if defined(__VISAGECPP__) || defined(__WATCOMC__)
 157
 158     #define MASK_SIGNAL() {
 159     #define UNMASK_SIGNAL() }
 160
 161 #else
 162     extern "C" { typedef void (*wxSigHandler)(int); }
 163
 164     #define MASK_SIGNAL()                       \
 165     {                                           \
 166         wxSigHandler old_handler = signal(SIGPIPE, SIG_IGN);
 167
 168     #define UNMASK_SIGNAL()                     \
 169         signal(SIGPIPE, old_handler);           \
 170     }
 171
 172 #endif
 173
 174 /* If a SIGPIPE is issued by a socket call on a remotely closed socket,
 175    the program will "crash" unless it explicitly handles the SIGPIPE.
 176    By using MSG_NOSIGNAL, the SIGPIPE is suppressed. Later, we will
 177    use SO_NOSIGPIPE (if available), the BSD equivalent. */
 178 #ifdef MSG_NOSIGNAL
 179 #  define GSOCKET_MSG_NOSIGNAL MSG_NOSIGNAL
 180 #else /* MSG_NOSIGNAL not available (FreeBSD including OS X) */
 181 #  define GSOCKET_MSG_NOSIGNAL 0
 182 #endif /* MSG_NOSIGNAL */
 183
 184 #ifndef __GSOCKET_STANDALONE__
 185 #  include "wx/unix/gsockunx.h"
 186 #  include "wx/unix/private.h"
 187 #  include "wx/gsocket.h"
 188 #if wxUSE_THREADS && (defined(HAVE_GETHOSTBYNAME) || defined(HAVE_GETSERVBYNAME))
 189 #  include "wx/thread.h"
 190 #endif
 191 #else
 192 #  include "gsockunx.h"
 193 #  include "gsocket.h"
 194 #  ifndef WXUNUSED
 195 #    define WXUNUSED(x)
 196 #  endif
 197 #endif /* __GSOCKET_STANDALONE__ */
 198
 199 #if defined(HAVE_GETHOSTBYNAME)
 200 static struct hostent * deepCopyHostent(struct hostent *h,
 201                                         const struct hostent *he,
 202                                         char *buffer, int size, int *err)
 203 {
 204   /* copy old structure */
 205   memcpy(h, he, sizeof(struct hostent));
 206
 207   /* copy name */
 208   int len = strlen(h->h_name);
 209   if (len > size)
 210   {
 211     *err = ENOMEM;
 212     return NULL;
 213   }
 214   memcpy(buffer, h->h_name, len);
 215   buffer[len] = '\0';
 216   h->h_name = buffer;
 217
 218   /* track position in the buffer */
 219   int pos = len + 1;
 220
 221   /* reuse len to store address length */
 222   len = h->h_length;
 223
 224   /* ensure pointer alignment */
 225   unsigned int misalign = sizeof(char *) - pos%sizeof(char *);
 226   if(misalign < sizeof(char *))
 227     pos += misalign;
 228
 229   /* leave space for pointer list */
 230   char **p = h->h_addr_list, **q;
 231   char **h_addr_list = (char **)(buffer + pos);
 232   while(*(p++) != 0)
 233     pos += sizeof(char *);
 234
 235   /* copy addresses and fill new pointer list */
 236   for (p = h->h_addr_list, q = h_addr_list; *p != 0; p++, q++)
 237   {
 238     if (size < pos + len)
 239     {
 240       *err = ENOMEM;
 241       return NULL;
 242     }
 243     memcpy(buffer + pos, *p, len); /* copy content */
 244     *q = buffer + pos; /* set copied pointer to copied content */
 245     pos += len;
 246   }
 247   *++q = 0; /* null terminate the pointer list */
 248   h->h_addr_list = h_addr_list; /* copy pointer to pointers */
 249
 250   /* ensure word alignment of pointers */
 251   misalign = sizeof(char *) - pos%sizeof(char *);
 252   if(misalign < sizeof(char *))
 253     pos += misalign;
 254
 255   /* leave space for pointer list */
 256   p = h->h_aliases;
 257   char **h_aliases = (char **)(buffer + pos);
 258   while(*(p++) != 0)
 259     pos += sizeof(char *);
 260
 261   /* copy aliases and fill new pointer list */
 262   for (p = h->h_aliases, q = h_aliases; *p != 0; p++, q++)
 263   {
 264     len = strlen(*p);
 265     if (size <= pos + len)
 266     {
 267       *err = ENOMEM;
 268       return NULL;
 269     }
 270     memcpy(buffer + pos, *p, len); /* copy content */
 271     buffer[pos + len] = '\0';
 272     *q = buffer + pos; /* set copied pointer to copied content */
 273     pos += len + 1;
 274   }
 275   *++q = 0; /* null terminate the pointer list */
 276   h->h_aliases = h_aliases; /* copy pointer to pointers */
 277
 278   return h;
 279 }
 280 #endif
 281
 282 #if defined(HAVE_GETHOSTBYNAME) && wxUSE_THREADS
 283 static wxMutex nameLock;
 284 #endif
 285 struct hostent * wxGethostbyname_r(const char *hostname, struct hostent *h,
 286                                    void *buffer, int size, int *err)
 287
 288 {
 289   struct hostent *he = NULL;
 290   *err = 0;
 291 #if defined(HAVE_FUNC_GETHOSTBYNAME_R_6)
 292   if (gethostbyname_r(hostname, h, (char*)buffer, size, &he, err))
 293     he = NULL;
 294 #elif defined(HAVE_FUNC_GETHOSTBYNAME_R_5)
 295   he = gethostbyname_r(hostname, h, (char*)buffer, size, err);
 296 #elif defined(HAVE_FUNC_GETHOSTBYNAME_R_3)
 297   if (gethostbyname_r(hostname, h, (struct hostent_data*) buffer))
 298   {
 299     he = NULL;
 300     *err = h_errno;
 301   }
 302   else
 303     he = h;
 304 #elif defined(HAVE_GETHOSTBYNAME)
 305 #if wxUSE_THREADS
 306   wxMutexLocker locker(nameLock);
 307 #endif
 308   he = gethostbyname(hostname);
 309   if (!he)
 310     *err = h_errno;
 311   else
 312     he = deepCopyHostent(h, he, (char*)buffer, size, err);
 313 #endif
 314   return he;
 315 }
 316
 317 #if defined(HAVE_GETHOSTBYNAME) && wxUSE_THREADS
 318 static wxMutex addrLock;
 319 #endif
 320 struct hostent * wxGethostbyaddr_r(const char *addr_buf, int buf_size,
 321                                    int proto, struct hostent *h,
 322                                    void *buffer, int size, int *err)
 323 {
 324   struct hostent *he = NULL;
 325   *err = 0;
 326 #if defined(HAVE_FUNC_GETHOSTBYNAME_R_6)
 327   if (gethostbyaddr_r(addr_buf, buf_size, proto, h,
 328                       (char*)buffer, size, &he, err))
 329     he = NULL;
 330 #elif defined(HAVE_FUNC_GETHOSTBYNAME_R_5)
 331   he = gethostbyaddr_r(addr_buf, buf_size, proto, h, (char*)buffer, size, err);
 332 #elif defined(HAVE_FUNC_GETHOSTBYNAME_R_3)
 333   if (gethostbyaddr_r(addr_buf, buf_size, proto, h,
 334                         (struct hostent_data*) buffer))
 335   {
 336     he = NULL;
 337     *err = h_errno;
 338   }
 339   else
 340     he = h;
 341 #elif defined(HAVE_GETHOSTBYNAME)
 342 #if wxUSE_THREADS
 343   wxMutexLocker locker(addrLock);
 344 #endif
 345   he = gethostbyaddr(addr_buf, buf_size, proto);
 346   if (!he)
 347     *err = h_errno;
 348   else
 349     he = deepCopyHostent(h, he, (char*)buffer, size, err);
 350 #endif
 351   return he;
 352 }
 353
 354 #if defined(HAVE_GETSERVBYNAME)
 355 static struct servent * deepCopyServent(struct servent *s,
 356                                         const struct servent *se,
 357                                         char *buffer, int size)
 358 {
 359   /* copy plain old structure */
 360   memcpy(s, se, sizeof(struct servent));
 361
 362   /* copy name */
 363   int len = strlen(s->s_name);
 364   if (len >= size)
 365   {
 366     return NULL;
 367   }
 368   memcpy(buffer, s->s_name, len);
 369   buffer[len] = '\0';
 370   s->s_name = buffer;
 371
 372   /* track position in the buffer */
 373   int pos = len + 1;
 374
 375   /* copy protocol */
 376   len = strlen(s->s_proto);
 377   if (pos + len >= size)
 378   {
 379     return NULL;
 380   }
 381   memcpy(buffer + pos, s->s_proto, len);
 382   buffer[pos + len] = '\0';
 383   s->s_proto = buffer + pos;
 384
 385   /* track position in the buffer */
 386   pos += len + 1;
 387
 388   /* ensure pointer alignment */
 389   unsigned int misalign = sizeof(char *) - pos%sizeof(char *);
 390   if(misalign < sizeof(char *))
 391     pos += misalign;
 392
 393   /* leave space for pointer list */
 394   char **p = s->s_aliases, **q;
 395   char **s_aliases = (char **)(buffer + pos);
 396   while(*(p++) != 0)
 397     pos += sizeof(char *);
 398
 399   /* copy addresses and fill new pointer list */
 400   for (p = s->s_aliases, q = s_aliases; *p != 0; p++, q++){
 401     len = strlen(*p);
 402     if (size <= pos + len)
 403     {
 404       return NULL;
 405     }
 406     memcpy(buffer + pos, *p, len); /* copy content */
 407     buffer[pos + len] = '\0';
 408     *q = buffer + pos; /* set copied pointer to copied content */
 409     pos += len + 1;
 410   }
 411   *++q = 0; /* null terminate the pointer list */
 412   s->s_aliases = s_aliases; /* copy pointer to pointers */
 413   return s;
 414 }
 415 #endif
 416
 417 #if defined(HAVE_GETSERVBYNAME) && wxUSE_THREADS
 418 static wxMutex servLock;
 419 #endif
 420 struct servent *wxGetservbyname_r(const char *port, const char *protocol,
 421                                   struct servent *serv, void *buffer, int size)
 422 {
 423   struct servent *se = NULL;
 424 #if defined(HAVE_FUNC_GETSERVBYNAME_R_6)
 425   if (getservbyname_r(port, protocol, serv, (char*)buffer, size, &se))
 426     se = NULL;
 427 #elif defined(HAVE_FUNC_GETSERVBYNAME_R_5)
 428   se = getservbyname_r(port, protocol, serv, (char*)buffer, size);
 429 #elif defined(HAVE_FUNC_GETSERVBYNAME_R_4)
 430   if (getservbyname_r(port, protocol, serv, (struct servent_data*) buffer))
 431     se = NULL;
 432   else
 433     se = serv;
 434 #elif defined(HAVE_GETSERVBYNAME)
 435 #if wxUSE_THREADS
 436   wxMutexLocker locker(servLock);
 437 #endif
 438   se = getservbyname(port, protocol);
 439   if (se)
 440     se = deepCopyServent(serv, se, (char*)buffer, size);
 441 #endif
 442   return se;
 443 }
 444
 445 /* debugging helpers */
 446 #ifdef __GSOCKET_DEBUG__
 447 #  define GSocket_Debug(args) printf args
 448 #else
 449 #  define GSocket_Debug(args)
 450 #endif /* __GSOCKET_DEBUG__ */
 451
 452 /* Table of GUI-related functions. We must call them indirectly because
 453  * of wxBase and GUI separation: */
 454
 455 static GSocketGUIFunctionsTable *gs_gui_functions;
 456
 457 class GSocketGUIFunctionsTableNull: public GSocketGUIFunctionsTable
 458 {
 459 public:
 460     virtual bool OnInit();
 461     virtual void OnExit();
 462     virtual bool CanUseEventLoop();
 463     virtual bool Init_Socket(GSocket *socket);
 464     virtual void Destroy_Socket(GSocket *socket);
 465     virtual void Install_Callback(GSocket *socket, GSocketEvent event);
 466     virtual void Uninstall_Callback(GSocket *socket, GSocketEvent event);
 467     virtual void Enable_Events(GSocket *socket);
 468     virtual void Disable_Events(GSocket *socket);
 469 };
 470
 471 bool GSocketGUIFunctionsTableNull::OnInit()
 472 {   return true; }
 473 void GSocketGUIFunctionsTableNull::OnExit()
 474 {}
 475 bool GSocketGUIFunctionsTableNull::CanUseEventLoop()
 476 {   return false; }
 477 bool GSocketGUIFunctionsTableNull::Init_Socket(GSocket *WXUNUSED(socket))
 478 {   return true; }
 479 void GSocketGUIFunctionsTableNull::Destroy_Socket(GSocket *WXUNUSED(socket))
 480 {}
 481 void GSocketGUIFunctionsTableNull::Install_Callback(GSocket *WXUNUSED(socket), GSocketEvent WXUNUSED(event))
 482 {}
 483 void GSocketGUIFunctionsTableNull::Uninstall_Callback(GSocket *WXUNUSED(socket), GSocketEvent WXUNUSED(event))
 484 {}
 485 void GSocketGUIFunctionsTableNull::Enable_Events(GSocket *WXUNUSED(socket))
 486 {}
 487 void GSocketGUIFunctionsTableNull::Disable_Events(GSocket *WXUNUSED(socket))
 488 {}
 489 /* Global initialisers */
 490
 491 void GSocket_SetGUIFunctions(GSocketGUIFunctionsTable *guifunc)
 492 {
 493   gs_gui_functions = guifunc;
 494 }
 495
 496 int GSocket_Init(void)
 497 {
 498   if (!gs_gui_functions)
 499   {
 500     static GSocketGUIFunctionsTableNull table;
 501     gs_gui_functions = &table;
 502   }
 503   if ( !gs_gui_functions->OnInit() )
 504     return 0;
 505   return 1;
 506 }
 507
 508 void GSocket_Cleanup(void)
 509 {
 510   if (gs_gui_functions)
 511   {
 512       gs_gui_functions->OnExit();
 513   }
 514 }
 515
 516 /* Constructors / Destructors for GSocket */
 517
 518 GSocket::GSocket()
 519 {
 520   int i;
 521
 522   m_fd                  = INVALID_SOCKET;
 523   for (i=0;i<GSOCK_MAX_EVENT;i++)
 524   {
 525     m_cbacks[i]         = NULL;
 526   }
 527   m_detected            = 0;
 528   m_local               = NULL;
 529   m_peer                = NULL;
 530   m_error               = GSOCK_NOERROR;
 531   m_server              = false;
 532   m_stream              = true;
 533   m_gui_dependent       = NULL;
 534   m_non_blocking        = false;
 535   m_reusable            = false;
 536   m_timeout             = 10*60*1000;
 537                                 /* 10 minutes * 60 sec * 1000 millisec */
 538   m_establishing        = false;
 539
 540   assert(gs_gui_functions);
 541   /* Per-socket GUI-specific initialization */
 542   m_ok = gs_gui_functions->Init_Socket(this);
 543 }
 544
 545 void GSocket::Close()
 546 {
 547     gs_gui_functions->Disable_Events(this);
 548     /* gsockosx.c calls CFSocketInvalidate which closes the socket for us */
 549 #if !(defined(__DARWIN__) && (defined(__WXMAC__) || defined(__WXCOCOA__)))
 550     close(m_fd);
 551 #endif
 552     m_fd = INVALID_SOCKET;
 553 }
 554
 555 GSocket::~GSocket()
 556 {
 557   assert(this);
 558
 559   /* Check that the socket is really shutdowned */
 560   if (m_fd != INVALID_SOCKET)
 561     Shutdown();
 562
 563   /* Per-socket GUI-specific cleanup */
 564   gs_gui_functions->Destroy_Socket(this);
 565
 566   /* Destroy private addresses */
 567   if (m_local)
 568     GAddress_destroy(m_local);
 569
 570   if (m_peer)
 571     GAddress_destroy(m_peer);
 572 }
 573
 574 /* GSocket_Shutdown:
 575  *  Disallow further read/write operations on this socket, close
 576  *  the fd and disable all callbacks.
 577  */
 578 void GSocket::Shutdown()
 579 {
 580   int evt;
 581
 582   assert(this);
 583
 584   /* Don't allow events to fire after socket has been closed */
 585   gs_gui_functions->Disable_Events(this);
 586
 587   /* If socket has been created, shutdown it */
 588   if (m_fd != INVALID_SOCKET)
 589   {
 590     shutdown(m_fd, 1);
 591     Close();
 592   }
 593
 594   /* Disable GUI callbacks */
 595   for (evt = 0; evt < GSOCK_MAX_EVENT; evt++)
 596     m_cbacks[evt] = NULL;
 597
 598   m_detected = GSOCK_LOST_FLAG;
 599 }
 600
 601 /* Address handling */
 602
 603 /* GSocket_SetLocal:
 604  * GSocket_GetLocal:
 605  * GSocket_SetPeer:
 606  * GSocket_GetPeer:
 607  *  Set or get the local or peer address for this socket. The 'set'
 608  *  functions return GSOCK_NOERROR on success, an error code otherwise.
 609  *  The 'get' functions return a pointer to a GAddress object on success,
 610  *  or NULL otherwise, in which case they set the error code of the
 611  *  corresponding GSocket.
 612  *
 613  *  Error codes:
 614  *    GSOCK_INVSOCK - the socket is not valid.
 615  *    GSOCK_INVADDR - the address is not valid.
 616  */
 617 GSocketError GSocket::SetLocal(GAddress *address)
 618 {
 619   assert(this);
 620
 621   /* the socket must be initialized, or it must be a server */
 622   if ((m_fd != INVALID_SOCKET && !m_server))
 623   {
 624     m_error = GSOCK_INVSOCK;
 625     return GSOCK_INVSOCK;
 626   }
 627
 628   /* check address */
 629   if (address == NULL || address->m_family == GSOCK_NOFAMILY)
 630   {
 631     m_error = GSOCK_INVADDR;
 632     return GSOCK_INVADDR;
 633   }
 634
 635   if (m_local)
 636     GAddress_destroy(m_local);
 637
 638   m_local = GAddress_copy(address);
 639
 640   return GSOCK_NOERROR;
 641 }
 642
 643 GSocketError GSocket::SetPeer(GAddress *address)
 644 {
 645   assert(this);
 646
 647   /* check address */
 648   if (address == NULL || address->m_family == GSOCK_NOFAMILY)
 649   {
 650     m_error = GSOCK_INVADDR;
 651     return GSOCK_INVADDR;
 652   }
 653
 654   if (m_peer)
 655     GAddress_destroy(m_peer);
 656
 657   m_peer = GAddress_copy(address);
 658
 659   return GSOCK_NOERROR;
 660 }
 661
 662 GAddress *GSocket::GetLocal()
 663 {
 664   GAddress *address;
 665   struct sockaddr addr;
 666   WX_SOCKLEN_T size = sizeof(addr);
 667   GSocketError err;
 668
 669   assert(this);
 670
 671   /* try to get it from the m_local var first */
 672   if (m_local)
 673     return GAddress_copy(m_local);
 674
 675   /* else, if the socket is initialized, try getsockname */
 676   if (m_fd == INVALID_SOCKET)
 677   {
 678     m_error = GSOCK_INVSOCK;
 679     return NULL;
 680   }
 681
 682   if (getsockname(m_fd, &addr, (WX_SOCKLEN_T *) &size) < 0)
 683   {
 684     m_error = GSOCK_IOERR;
 685     return NULL;
 686   }
 687
 688   /* got a valid address from getsockname, create a GAddress object */
 689   address = GAddress_new();
 690   if (address == NULL)
 691   {
 692     m_error = GSOCK_MEMERR;
 693     return NULL;
 694   }
 695
 696   err = _GAddress_translate_from(address, &addr, size);
 697   if (err != GSOCK_NOERROR)
 698   {
 699     GAddress_destroy(address);
 700     m_error = err;
 701     return NULL;
 702   }
 703
 704   return address;
 705 }
 706
 707 GAddress *GSocket::GetPeer()
 708 {
 709   assert(this);
 710
 711   /* try to get it from the m_peer var */
 712   if (m_peer)
 713     return GAddress_copy(m_peer);
 714
 715   return NULL;
 716 }
 717
 718 /* Server specific parts */
 719
 720 /* GSocket_SetServer:
 721  *  Sets up this socket as a server. The local address must have been
 722  *  set with GSocket_SetLocal() before GSocket_SetServer() is called.
 723  *  Returns GSOCK_NOERROR on success, one of the following otherwise:
 724  *
 725  *  Error codes:
 726  *    GSOCK_INVSOCK - the socket is in use.
 727  *    GSOCK_INVADDR - the local address has not been set.
 728  *    GSOCK_IOERR   - low-level error.
 729  */
 730 GSocketError GSocket::SetServer()
 731 {
 732   int arg = 1;
 733
 734   assert(this);
 735
 736   /* must not be in use */
 737   if (m_fd != INVALID_SOCKET)
 738   {
 739     m_error = GSOCK_INVSOCK;
 740     return GSOCK_INVSOCK;
 741   }
 742
 743   /* the local addr must have been set */
 744   if (!m_local)
 745   {
 746     m_error = GSOCK_INVADDR;
 747     return GSOCK_INVADDR;
 748   }
 749
 750   /* Initialize all fields */
 751   m_stream   = true;
 752   m_server   = true;
 753
 754   /* Create the socket */
 755   m_fd = socket(m_local->m_realfamily, SOCK_STREAM, 0);
 756
 757   if (m_fd == INVALID_SOCKET)
 758   {
 759     m_error = GSOCK_IOERR;
 760     return GSOCK_IOERR;
 761   }
 762
 763   /* FreeBSD variants can't use MSG_NOSIGNAL, and instead use a socket option */
 764 #ifdef SO_NOSIGPIPE
 765   setsockopt(m_fd, SOL_SOCKET, SO_NOSIGPIPE, (const char*)&arg, sizeof(arg));
 766 #endif
 767
 768   ioctl(m_fd, FIONBIO, &arg);
 769   gs_gui_functions->Enable_Events(this);
 770
 771   /* allow a socket to re-bind if the socket is in the TIME_WAIT
 772      state after being previously closed.
 773    */
 774   if (m_reusable)
 775   {
 776     setsockopt(m_fd, SOL_SOCKET, SO_REUSEADDR, (const char*)&arg, sizeof(arg));
 777 #ifdef SO_REUSEPORT
 778     setsockopt(m_fd, SOL_SOCKET, SO_REUSEPORT, (const char*)&arg, sizeof(arg));
 779 #endif
 780   }
 781
 782   /* Bind to the local address,
 783    * retrieve the actual address bound,
 784    * and listen up to 5 connections.
 785    */
 786   if ((bind(m_fd, m_local->m_addr, m_local->m_len) != 0) ||
 787       (getsockname(m_fd,
 788                    m_local->m_addr,
 789                    (WX_SOCKLEN_T *) &m_local->m_len) != 0) ||
 790       (listen(m_fd, 5) != 0))
 791   {
 792     Close();
 793     m_error = GSOCK_IOERR;
 794     return GSOCK_IOERR;
 795   }
 796
 797   return GSOCK_NOERROR;
 798 }
 799
 800 /* GSocket_WaitConnection:
 801  *  Waits for an incoming client connection. Returns a pointer to
 802  *  a GSocket object, or NULL if there was an error, in which case
 803  *  the last error field will be updated for the calling GSocket.
 804  *
 805  *  Error codes (set in the calling GSocket)
 806  *    GSOCK_INVSOCK    - the socket is not valid or not a server.
 807  *    GSOCK_TIMEDOUT   - timeout, no incoming connections.
 808  *    GSOCK_WOULDBLOCK - the call would block and the socket is nonblocking.
 809  *    GSOCK_MEMERR     - couldn't allocate memory.
 810  *    GSOCK_IOERR      - low-level error.
 811  */
 812 GSocket *GSocket::WaitConnection()
 813 {
 814   struct sockaddr from;
 815   WX_SOCKLEN_T fromlen = sizeof(from);
 816   GSocket *connection;
 817   GSocketError err;
 818   int arg = 1;
 819
 820   assert(this);
 821
 822   /* If the socket has already been created, we exit immediately */
 823   if (m_fd == INVALID_SOCKET || !m_server)
 824   {
 825     m_error = GSOCK_INVSOCK;
 826     return NULL;
 827   }
 828
 829   /* Create a GSocket object for the new connection */
 830   connection = GSocket_new();
 831
 832   if (!connection)
 833   {
 834     m_error = GSOCK_MEMERR;
 835     return NULL;
 836   }
 837
 838   /* Wait for a connection (with timeout) */
 839   if (Input_Timeout() == GSOCK_TIMEDOUT)
 840   {
 841     delete connection;
 842     /* m_error set by _GSocket_Input_Timeout */
 843     return NULL;
 844   }
 845
 846   connection->m_fd = accept(m_fd, &from, (WX_SOCKLEN_T *) &fromlen);
 847
 848   /* Reenable CONNECTION events */
 849   Enable(GSOCK_CONNECTION);
 850
 851   if (connection->m_fd == INVALID_SOCKET)
 852   {
 853     if (errno == EWOULDBLOCK)
 854       m_error = GSOCK_WOULDBLOCK;
 855     else
 856       m_error = GSOCK_IOERR;
 857
 858     delete connection;
 859     return NULL;
 860   }
 861
 862   /* Initialize all fields */
 863   connection->m_server   = false;
 864   connection->m_stream   = true;
 865
 866   /* Setup the peer address field */
 867   connection->m_peer = GAddress_new();
 868   if (!connection->m_peer)
 869   {
 870     delete connection;
 871     m_error = GSOCK_MEMERR;
 872     return NULL;
 873   }
 874
 875   err = _GAddress_translate_from(connection->m_peer, &from, fromlen);
 876   if (err != GSOCK_NOERROR)
 877   {
 878     delete connection;
 879     m_error = err;
 880     return NULL;
 881   }
 882
 883 #if defined(__EMX__) || defined(__VISAGECPP__)
 884   ioctl(connection->m_fd, FIONBIO, (char*)&arg, sizeof(arg));
 885 #else
 886   ioctl(connection->m_fd, FIONBIO, &arg);
 887 #endif
 888   gs_gui_functions->Enable_Events(connection);
 889
 890   return connection;
 891 }
 892
 893 bool GSocket::SetReusable()
 894 {
 895     /* socket must not be null, and must not be in use/already bound */
 896     if (this && m_fd == INVALID_SOCKET)
 897     {
 898         m_reusable = true;
 899
 900         return true;
 901     }
 902
 903     return false;
 904 }
 905
 906 /* Client specific parts */
 907
 908 /* GSocket_Connect:
 909  *  For stream (connection oriented) sockets, GSocket_Connect() tries
 910  *  to establish a client connection to a server using the peer address
 911  *  as established with GSocket_SetPeer(). Returns GSOCK_NOERROR if the
 912  *  connection has been successfully established, or one of the error
 913  *  codes listed below. Note that for nonblocking sockets, a return
 914  *  value of GSOCK_WOULDBLOCK doesn't mean a failure. The connection
 915  *  request can be completed later; you should use GSocket_Select()
 916  *  to poll for GSOCK_CONNECTION | GSOCK_LOST, or wait for the
 917  *  corresponding asynchronous events.
 918  *
 919  *  For datagram (non connection oriented) sockets, GSocket_Connect()
 920  *  just sets the peer address established with GSocket_SetPeer() as
 921  *  default destination.
 922  *
 923  *  Error codes:
 924  *    GSOCK_INVSOCK    - the socket is in use or not valid.
 925  *    GSOCK_INVADDR    - the peer address has not been established.
 926  *    GSOCK_TIMEDOUT   - timeout, the connection failed.
 927  *    GSOCK_WOULDBLOCK - connection in progress (nonblocking sockets only)
 928  *    GSOCK_MEMERR     - couldn't allocate memory.
 929  *    GSOCK_IOERR      - low-level error.
 930  */
 931 GSocketError GSocket::Connect(GSocketStream stream)
 932 {
 933   int err, ret;
 934   int arg = 1;
 935
 936   assert(this);
 937
 938   /* Enable CONNECTION events (needed for nonblocking connections) */
 939   Enable(GSOCK_CONNECTION);
 940
 941   if (m_fd != INVALID_SOCKET)
 942   {
 943     m_error = GSOCK_INVSOCK;
 944     return GSOCK_INVSOCK;
 945   }
 946
 947   if (!m_peer)
 948   {
 949     m_error = GSOCK_INVADDR;
 950     return GSOCK_INVADDR;
 951   }
 952
 953   /* Streamed or dgram socket? */
 954   m_stream   = (stream == GSOCK_STREAMED);
 955   m_server   = false;
 956   m_establishing = false;
 957
 958   /* Create the socket */
 959   m_fd = socket(m_peer->m_realfamily,
 960                      m_stream? SOCK_STREAM : SOCK_DGRAM, 0);
 961
 962   if (m_fd == INVALID_SOCKET)
 963   {
 964     m_error = GSOCK_IOERR;
 965     return GSOCK_IOERR;
 966   }
 967
 968   /* FreeBSD variants can't use MSG_NOSIGNAL, and instead use a socket option */
 969 #ifdef SO_NOSIGPIPE
 970   setsockopt(m_fd, SOL_SOCKET, SO_NOSIGPIPE, (const char*)&arg, sizeof(arg));
 971 #endif
 972
 973 #if defined(__EMX__) || defined(__VISAGECPP__)
 974   ioctl(m_fd, FIONBIO, (char*)&arg, sizeof(arg));
 975 #else
 976   ioctl(m_fd, FIONBIO, &arg);
 977 #endif
 978
 979   // If the reuse flag is set, use the applicable socket reuse flags(s)
 980   if (m_reusable)
 981   {
 982     setsockopt(m_fd, SOL_SOCKET, SO_REUSEADDR, (const char*)&arg, sizeof(arg));
 983 #ifdef SO_REUSEPORT
 984     setsockopt(m_fd, SOL_SOCKET, SO_REUSEPORT, (const char*)&arg, sizeof(arg));
 985 #endif
 986   }
 987
 988   // If a local address has been set, then we need to bind to it before calling connect
 989   if (m_local && m_local->m_addr)
 990   {
 991      bind(m_fd, m_local->m_addr, m_local->m_len);
 992   }
 993
 994   /* Connect it to the peer address, with a timeout (see below) */
 995   ret = connect(m_fd, m_peer->m_addr, m_peer->m_len);
 996
 997   /* We only call Enable_Events if we know we aren't shutting down the socket.
 998    * NB: Enable_Events needs to be called whether the socket is blocking or
 999    * non-blocking, it just shouldn't be called prior to knowing there is a
1000    * connection _if_ blocking sockets are being used.
1001    * If connect above returns 0, we are already connected and need to make the
1002    * call to Enable_Events now.
1003    */
1004
1005   if (m_non_blocking || ret == 0)
1006     gs_gui_functions->Enable_Events(this);
1007
1008   if (ret == -1)
1009   {
1010     err = errno;
1011
1012     /* If connect failed with EINPROGRESS and the GSocket object
1013      * is in blocking mode, we select() for the specified timeout
1014      * checking for writability to see if the connection request
1015      * completes.
1016      */
1017     if ((err == EINPROGRESS) && (!m_non_blocking))
1018     {
1019       if (Output_Timeout() == GSOCK_TIMEDOUT)
1020       {
1021         Close();
1022         /* m_error is set in _GSocket_Output_Timeout */
1023         return GSOCK_TIMEDOUT;
1024       }
1025       else
1026       {
1027         int error;
1028         SOCKOPTLEN_T len = sizeof(error);
1029
1030         getsockopt(m_fd, SOL_SOCKET, SO_ERROR, (char*) &error, &len);
1031
1032         gs_gui_functions->Enable_Events(this);
1033
1034         if (!error)
1035           return GSOCK_NOERROR;
1036       }
1037     }
1038
1039     /* If connect failed with EINPROGRESS and the GSocket object
1040      * is set to nonblocking, we set m_error to GSOCK_WOULDBLOCK
1041      * (and return GSOCK_WOULDBLOCK) but we don't close the socket;
1042      * this way if the connection completes, a GSOCK_CONNECTION
1043      * event will be generated, if enabled.
1044      */
1045     if ((err == EINPROGRESS) && (m_non_blocking))
1046     {
1047       m_establishing = true;
1048       m_error = GSOCK_WOULDBLOCK;
1049       return GSOCK_WOULDBLOCK;
1050     }
1051
1052     /* If connect failed with an error other than EINPROGRESS,
1053      * then the call to GSocket_Connect has failed.
1054      */
1055     Close();
1056     m_error = GSOCK_IOERR;
1057
1058     return GSOCK_IOERR;
1059   }
1060
1061   return GSOCK_NOERROR;
1062 }
1063
1064 /* Datagram sockets */
1065
1066 /* GSocket_SetNonOriented:
1067  *  Sets up this socket as a non-connection oriented (datagram) socket.
1068  *  Before using this function, the local address must have been set
1069  *  with GSocket_SetLocal(), or the call will fail. Returns GSOCK_NOERROR
1070  *  on success, or one of the following otherwise.
1071  *
1072  *  Error codes:
1073  *    GSOCK_INVSOCK - the socket is in use.
1074  *    GSOCK_INVADDR - the local address has not been set.
1075  *    GSOCK_IOERR   - low-level error.
1076  */
1077 GSocketError GSocket::SetNonOriented()
1078 {
1079   int arg = 1;
1080
1081   assert(this);
1082
1083   if (m_fd != INVALID_SOCKET)
1084   {
1085     m_error = GSOCK_INVSOCK;
1086     return GSOCK_INVSOCK;
1087   }
1088
1089   if (!m_local)
1090   {
1091     m_error = GSOCK_INVADDR;
1092     return GSOCK_INVADDR;
1093   }
1094
1095   /* Initialize all fields */
1096   m_stream   = false;
1097   m_server   = false;
1098
1099   /* Create the socket */
1100   m_fd = socket(m_local->m_realfamily, SOCK_DGRAM, 0);
1101
1102   if (m_fd == INVALID_SOCKET)
1103   {
1104     m_error = GSOCK_IOERR;
1105     return GSOCK_IOERR;
1106   }
1107 #if defined(__EMX__) || defined(__VISAGECPP__)
1108   ioctl(m_fd, FIONBIO, (char*)&arg, sizeof(arg));
1109 #else
1110   ioctl(m_fd, FIONBIO, &arg);
1111 #endif
1112   gs_gui_functions->Enable_Events(this);
1113
1114   if (m_reusable)
1115   {
1116     setsockopt(m_fd, SOL_SOCKET, SO_REUSEADDR, (const char*)&arg, sizeof(arg));
1117 #ifdef SO_REUSEPORT
1118     setsockopt(m_fd, SOL_SOCKET, SO_REUSEPORT, (const char*)&arg, sizeof(arg));
1119 #endif
1120   }
1121
1122   /* Bind to the local address,
1123    * and retrieve the actual address bound.
1124    */
1125   if ((bind(m_fd, m_local->m_addr, m_local->m_len) != 0) ||
1126       (getsockname(m_fd,
1127                    m_local->m_addr,
1128                    (WX_SOCKLEN_T *) &m_local->m_len) != 0))
1129   {
1130     Close();
1131     m_error = GSOCK_IOERR;
1132     return GSOCK_IOERR;
1133   }
1134
1135   return GSOCK_NOERROR;
1136 }
1137
1138 /* Generic IO */
1139
1140 /* Like recv(), send(), ... */
1141 int GSocket::Read(char *buffer, int size)
1142 {
1143   int ret;
1144
1145   assert(this);
1146
1147   if (m_fd == INVALID_SOCKET || m_server)
1148   {
1149     m_error = GSOCK_INVSOCK;
1150     return -1;
1151   }
1152
1153   /* Disable events during query of socket status */
1154   Disable(GSOCK_INPUT);
1155
1156   /* If the socket is blocking, wait for data (with a timeout) */
1157   if (Input_Timeout() == GSOCK_TIMEDOUT) {
1158     m_error = GSOCK_TIMEDOUT;
1159     /* Don't return here immediately, otherwise socket events would not be
1160      * re-enabled! */
1161     ret = -1;
1162   }
1163   else
1164   {
1165     /* Read the data */
1166     if (m_stream)
1167       ret = Recv_Stream(buffer, size);
1168     else
1169       ret = Recv_Dgram(buffer, size);
1170
1171     /* If recv returned zero, then the connection has been gracefully closed.
1172      * Otherwise, recv has returned an error (-1), in which case we have lost the
1173      * socket only if errno does _not_ indicate that there may be more data to read.
1174      */
1175     if (ret == 0)
1176     {
1177       /* Make sure wxSOCKET_LOST event gets sent and shut down the socket */
1178       m_detected = GSOCK_LOST_FLAG;
1179       Detected_Read();
1180       return 0;
1181     }
1182     else if (ret == -1)
1183     {
1184       if ((errno == EWOULDBLOCK) || (errno == EAGAIN))
1185         m_error = GSOCK_WOULDBLOCK;
1186       else
1187         m_error = GSOCK_IOERR;
1188     }
1189   }
1190
1191   /* Enable events again now that we are done processing */
1192   Enable(GSOCK_INPUT);
1193
1194   return ret;
1195 }
1196
1197 int GSocket::Write(const char *buffer, int size)
1198 {
1199   int ret;
1200
1201   assert(this);
1202
1203   GSocket_Debug(( "GSocket_Write #1, size %d\n", size ));
1204
1205   if (m_fd == INVALID_SOCKET || m_server)
1206   {
1207     m_error = GSOCK_INVSOCK;
1208     return -1;
1209   }
1210
1211   GSocket_Debug(( "GSocket_Write #2, size %d\n", size ));
1212
1213   /* If the socket is blocking, wait for writability (with a timeout) */
1214   if (Output_Timeout() == GSOCK_TIMEDOUT)
1215     return -1;
1216
1217   GSocket_Debug(( "GSocket_Write #3, size %d\n", size ));
1218
1219   /* Write the data */
1220   if (m_stream)
1221     ret = Send_Stream(buffer, size);
1222   else
1223     ret = Send_Dgram(buffer, size);
1224
1225   GSocket_Debug(( "GSocket_Write #4, size %d\n", size ));
1226
1227   if (ret == -1)
1228   {
1229     if ((errno == EWOULDBLOCK) || (errno == EAGAIN))
1230     {
1231       m_error = GSOCK_WOULDBLOCK;
1232       GSocket_Debug(( "GSocket_Write error WOULDBLOCK\n" ));
1233     }
1234     else
1235     {
1236       m_error = GSOCK_IOERR;
1237       GSocket_Debug(( "GSocket_Write error IOERR\n" ));
1238     }
1239
1240     /* Only reenable OUTPUT events after an error (just like WSAAsyncSelect
1241      * in MSW). Once the first OUTPUT event is received, users can assume
1242      * that the socket is writable until a read operation fails. Only then
1243      * will further OUTPUT events be posted.
1244      */
1245     Enable(GSOCK_OUTPUT);
1246
1247     return -1;
1248   }
1249
1250   GSocket_Debug(( "GSocket_Write #5, size %d ret %d\n", size, ret ));
1251
1252   return ret;
1253 }
1254
1255 /* GSocket_Select:
1256  *  Polls the socket to determine its status. This function will
1257  *  check for the events specified in the 'flags' parameter, and
1258  *  it will return a mask indicating which operations can be
1259  *  performed. This function won't block, regardless of the
1260  *  mode (blocking | nonblocking) of the socket.
1261  */
1262 GSocketEventFlags GSocket::Select(GSocketEventFlags flags)
1263 {
1264   if (!gs_gui_functions->CanUseEventLoop())
1265   {
1266
1267     GSocketEventFlags result = 0;
1268     fd_set readfds;
1269     fd_set writefds;
1270     fd_set exceptfds;
1271     struct timeval tv;
1272
1273     assert(this);
1274
1275     if (m_fd == -1)
1276         return (GSOCK_LOST_FLAG & flags);
1277
1278     /* Do not use a static struct, Linux can garble it */
1279     tv.tv_sec = m_timeout / 1000;
1280     tv.tv_usec = (m_timeout % 1000) * 1000;
1281
1282     wxFD_ZERO(&readfds);
1283     wxFD_ZERO(&writefds);
1284     wxFD_ZERO(&exceptfds);
1285     wxFD_SET(m_fd, &readfds);
1286     if (flags & GSOCK_OUTPUT_FLAG || flags & GSOCK_CONNECTION_FLAG)
1287       wxFD_SET(m_fd, &writefds);
1288     wxFD_SET(m_fd, &exceptfds);
1289
1290     /* Check 'sticky' CONNECTION flag first */
1291     result |= (GSOCK_CONNECTION_FLAG & m_detected);
1292
1293     /* If we have already detected a LOST event, then don't try
1294      * to do any further processing.
1295      */
1296     if ((m_detected & GSOCK_LOST_FLAG) != 0)
1297     {
1298       m_establishing = false;
1299
1300       return (GSOCK_LOST_FLAG & flags);
1301     }
1302
1303     /* Try select now */
1304     if (select(m_fd + 1, &readfds, &writefds, &exceptfds, &tv) <= 0)
1305     {
1306       /* What to do here? */
1307       return (result & flags);
1308     }
1309
1310     /* Check for exceptions and errors */
1311     if (wxFD_ISSET(m_fd, &exceptfds))
1312     {
1313       m_establishing = false;
1314       m_detected = GSOCK_LOST_FLAG;
1315
1316       /* LOST event: Abort any further processing */
1317       return (GSOCK_LOST_FLAG & flags);
1318     }
1319
1320     /* Check for readability */
1321     if (wxFD_ISSET(m_fd, &readfds))
1322     {
1323       result |= GSOCK_INPUT_FLAG;
1324
1325       if (m_server && m_stream)
1326       {
1327         /* This is a TCP server socket that detected a connection.
1328           While the INPUT_FLAG is also set, it doesn't matter on
1329           this kind of  sockets, as we can only Accept() from them. */
1330         result |= GSOCK_CONNECTION_FLAG;
1331         m_detected |= GSOCK_CONNECTION_FLAG;
1332       }
1333     }
1334
1335     /* Check for writability */
1336     if (wxFD_ISSET(m_fd, &writefds))
1337     {
1338       if (m_establishing && !m_server)
1339       {
1340         int error;
1341         SOCKOPTLEN_T len = sizeof(error);
1342
1343         m_establishing = false;
1344
1345         getsockopt(m_fd, SOL_SOCKET, SO_ERROR, (char*)&error, &len);
1346
1347         if (error)
1348         {
1349           m_detected = GSOCK_LOST_FLAG;
1350
1351           /* LOST event: Abort any further processing */
1352           return (GSOCK_LOST_FLAG & flags);
1353         }
1354         else
1355         {
1356           result |= GSOCK_CONNECTION_FLAG;
1357           m_detected |= GSOCK_CONNECTION_FLAG;
1358         }
1359       }
1360       else
1361       {
1362         result |= GSOCK_OUTPUT_FLAG;
1363       }
1364     }
1365
1366     return (result & flags);
1367
1368   }
1369   else
1370   {
1371     assert(this);
1372     return flags & m_detected;
1373   }
1374 }
1375
1376 /* Flags */
1377
1378 /* GSocket_SetNonBlocking:
1379  *  Sets the socket to non-blocking mode. All IO calls will return
1380  *  immediately.
1381  */
1382 void GSocket::SetNonBlocking(bool non_block)
1383 {
1384   assert(this);
1385
1386   GSocket_Debug( ("GSocket_SetNonBlocking: %d\n", (int)non_block) );
1387
1388   m_non_blocking = non_block;
1389 }
1390
1391 /* GSocket_SetTimeout:
1392  *  Sets the timeout for blocking calls. Time is expressed in
1393  *  milliseconds.
1394  */
1395 void GSocket::SetTimeout(unsigned long millisec)
1396 {
1397   assert(this);
1398
1399   m_timeout = millisec;
1400 }
1401
1402 /* GSocket_GetError:
1403  *  Returns the last error occurred for this socket. Note that successful
1404  *  operations do not clear this back to GSOCK_NOERROR, so use it only
1405  *  after an error.
1406  */
1407 GSocketError WXDLLIMPEXP_NET GSocket::GetError()
1408 {
1409   assert(this);
1410
1411   return m_error;
1412 }
1413
1414 /* Callbacks */
1415
1416 /* GSOCK_INPUT:
1417  *   There is data to be read in the input buffer. If, after a read
1418  *   operation, there is still data available, the callback function will
1419  *   be called again.
1420  * GSOCK_OUTPUT:
1421  *   The socket is available for writing. That is, the next write call
1422  *   won't block. This event is generated only once, when the connection is
1423  *   first established, and then only if a call failed with GSOCK_WOULDBLOCK,
1424  *   when the output buffer empties again. This means that the app should
1425  *   assume that it can write since the first OUTPUT event, and no more
1426  *   OUTPUT events will be generated unless an error occurs.
1427  * GSOCK_CONNECTION:
1428  *   Connection successfully established, for client sockets, or incoming
1429  *   client connection, for server sockets. Wait for this event (also watch
1430  *   out for GSOCK_LOST) after you issue a nonblocking GSocket_Connect() call.
1431  * GSOCK_LOST:
1432  *   The connection is lost (or a connection request failed); this could
1433  *   be due to a failure, or due to the peer closing it gracefully.
1434  */
1435
1436 /* GSocket_SetCallback:
1437  *  Enables the callbacks specified by 'flags'. Note that 'flags'
1438  *  may be a combination of flags OR'ed toghether, so the same
1439  *  callback function can be made to accept different events.
1440  *  The callback function must have the following prototype:
1441  *
1442  *  void function(GSocket *socket, GSocketEvent event, char *cdata)
1443  */
1444 void GSocket::SetCallback(GSocketEventFlags flags,
1445                          GSocketCallback callback, char *cdata)
1446 {
1447   int count;
1448
1449   assert(this);
1450
1451   for (count = 0; count < GSOCK_MAX_EVENT; count++)
1452   {
1453     if ((flags & (1 << count)) != 0)
1454     {
1455       m_cbacks[count] = callback;
1456       m_data[count] = cdata;
1457     }
1458   }
1459 }
1460
1461 /* GSocket_UnsetCallback:
1462  *  Disables all callbacks specified by 'flags', which may be a
1463  *  combination of flags OR'ed toghether.
1464  */
1465 void GSocket::UnsetCallback(GSocketEventFlags flags)
1466 {
1467   int count;
1468
1469   assert(this);
1470
1471   for (count = 0; count < GSOCK_MAX_EVENT; count++)
1472   {
1473     if ((flags & (1 << count)) != 0)
1474     {
1475       m_cbacks[count] = NULL;
1476       m_data[count] = NULL;
1477     }
1478   }
1479 }
1480
1481 GSocketError GSocket::GetSockOpt(int level, int optname,
1482                                 void *optval, int *optlen)
1483 {
1484     if (getsockopt(m_fd, level, optname, (char*)optval, (SOCKOPTLEN_T*)optlen) == 0)
1485         return GSOCK_NOERROR;
1486
1487     return GSOCK_OPTERR;
1488 }
1489
1490 GSocketError GSocket::SetSockOpt(int level, int optname,
1491                                 const void *optval, int optlen)
1492 {
1493     if (setsockopt(m_fd, level, optname, (const char*)optval, optlen) == 0)
1494         return GSOCK_NOERROR;
1495
1496     return GSOCK_OPTERR;
1497 }
1498
1499 #define CALL_CALLBACK(socket, event) {                                  \
1500   socket->Disable(event);                                               \
1501   if (socket->m_cbacks[event])                                          \
1502     socket->m_cbacks[event](socket, event, socket->m_data[event]);      \
1503 }
1504
1505
1506 void GSocket::Enable(GSocketEvent event)
1507 {
1508   m_detected &= ~(1 << event);
1509   gs_gui_functions->Install_Callback(this, event);
1510 }
1511
1512 void GSocket::Disable(GSocketEvent event)
1513 {
1514   m_detected |= (1 << event);
1515   gs_gui_functions->Uninstall_Callback(this, event);
1516 }
1517
1518 /* _GSocket_Input_Timeout:
1519  *  For blocking sockets, wait until data is available or
1520  *  until timeout ellapses.
1521  */
1522 GSocketError GSocket::Input_Timeout()
1523 {
1524   struct timeval tv;
1525   fd_set readfds;
1526   int ret;
1527
1528   /* Linux select() will overwrite the struct on return */
1529   tv.tv_sec  = (m_timeout / 1000);
1530   tv.tv_usec = (m_timeout % 1000) * 1000;
1531
1532   if (!m_non_blocking)
1533   {
1534     wxFD_ZERO(&readfds);
1535     wxFD_SET(m_fd, &readfds);
1536     ret = select(m_fd + 1, &readfds, NULL, NULL, &tv);
1537     if (ret == 0)
1538     {
1539       GSocket_Debug(( "GSocket_Input_Timeout, select returned 0\n" ));
1540       m_error = GSOCK_TIMEDOUT;
1541       return GSOCK_TIMEDOUT;
1542     }
1543
1544     if (ret == -1)
1545     {
1546       GSocket_Debug(( "GSocket_Input_Timeout, select returned -1\n" ));
1547       if (errno == EBADF) { GSocket_Debug(( "Invalid file descriptor\n" )); }
1548       if (errno == EINTR) { GSocket_Debug(( "A non blocked signal was caught\n" )); }
1549       if (errno == EINVAL) { GSocket_Debug(( "The highest number descriptor is negative\n" )); }
1550       if (errno == ENOMEM) { GSocket_Debug(( "Not enough memory\n" )); }
1551       m_error = GSOCK_TIMEDOUT;
1552       return GSOCK_TIMEDOUT;
1553     }
1554   }
1555
1556   return GSOCK_NOERROR;
1557 }
1558
1559 /* _GSocket_Output_Timeout:
1560  *  For blocking sockets, wait until data can be sent without
1561  *  blocking or until timeout ellapses.
1562  */
1563 GSocketError GSocket::Output_Timeout()
1564 {
1565   struct timeval tv;
1566   fd_set writefds;
1567   int ret;
1568
1569   /* Linux select() will overwrite the struct on return */
1570   tv.tv_sec  = (m_timeout / 1000);
1571   tv.tv_usec = (m_timeout % 1000) * 1000;
1572
1573   GSocket_Debug( ("m_non_blocking has: %d\n", (int)m_non_blocking) );
1574
1575   if (!m_non_blocking)
1576   {
1577     wxFD_ZERO(&writefds);
1578     wxFD_SET(m_fd, &writefds);
1579     ret = select(m_fd + 1, NULL, &writefds, NULL, &tv);
1580     if (ret == 0)
1581     {
1582       GSocket_Debug(( "GSocket_Output_Timeout, select returned 0\n" ));
1583       m_error = GSOCK_TIMEDOUT;
1584       return GSOCK_TIMEDOUT;
1585     }
1586
1587     if (ret == -1)
1588     {
1589       GSocket_Debug(( "GSocket_Output_Timeout, select returned -1\n" ));
1590       if (errno == EBADF) { GSocket_Debug(( "Invalid file descriptor\n" )); }
1591       if (errno == EINTR) { GSocket_Debug(( "A non blocked signal was caught\n" )); }
1592       if (errno == EINVAL) { GSocket_Debug(( "The highest number descriptor is negative\n" )); }
1593       if (errno == ENOMEM) { GSocket_Debug(( "Not enough memory\n" )); }
1594       m_error = GSOCK_TIMEDOUT;
1595       return GSOCK_TIMEDOUT;
1596     }
1597
1598     if ( ! wxFD_ISSET(m_fd, &writefds) )
1599     {
1600         GSocket_Debug(( "GSocket_Output_Timeout is buggy!\n" ));
1601     }
1602     else
1603     {
1604         GSocket_Debug(( "GSocket_Output_Timeout seems correct\n" ));
1605     }
1606   }
1607   else
1608   {
1609     GSocket_Debug(( "GSocket_Output_Timeout, didn't try select!\n" ));
1610   }
1611
1612   return GSOCK_NOERROR;
1613 }
1614
1615 int GSocket::Recv_Stream(char *buffer, int size)
1616 {
1617   int ret;
1618   do
1619   {
1620     ret = recv(m_fd, buffer, size, GSOCKET_MSG_NOSIGNAL);
1621   }
1622   while (ret == -1 && errno == EINTR); /* Loop until not interrupted */
1623
1624   return ret;
1625 }
1626
1627 int GSocket::Recv_Dgram(char *buffer, int size)
1628 {
1629   struct sockaddr from;
1630   WX_SOCKLEN_T fromlen = sizeof(from);
1631   int ret;
1632   GSocketError err;
1633
1634   fromlen = sizeof(from);
1635
1636   do
1637   {
1638     ret = recvfrom(m_fd, buffer, size, 0, &from, (WX_SOCKLEN_T *) &fromlen);
1639   }
1640   while (ret == -1 && errno == EINTR); /* Loop until not interrupted */
1641
1642   if (ret == -1)
1643     return -1;
1644
1645   /* Translate a system address into a GSocket address */
1646   if (!m_peer)
1647   {
1648     m_peer = GAddress_new();
1649     if (!m_peer)
1650     {
1651       m_error = GSOCK_MEMERR;
1652       return -1;
1653     }
1654   }
1655
1656   err = _GAddress_translate_from(m_peer, &from, fromlen);
1657   if (err != GSOCK_NOERROR)
1658   {
1659     GAddress_destroy(m_peer);
1660     m_peer  = NULL;
1661     m_error = err;
1662     return -1;
1663   }
1664
1665   return ret;
1666 }
1667
1668 int GSocket::Send_Stream(const char *buffer, int size)
1669 {
1670   int ret;
1671
1672   MASK_SIGNAL();
1673
1674   do
1675   {
1676     ret = send(m_fd, (char *)buffer, size, GSOCKET_MSG_NOSIGNAL);
1677   }
1678   while (ret == -1 && errno == EINTR); /* Loop until not interrupted */
1679
1680   UNMASK_SIGNAL();
1681
1682   return ret;
1683 }
1684
1685 int GSocket::Send_Dgram(const char *buffer, int size)
1686 {
1687   struct sockaddr *addr;
1688   int len, ret;
1689   GSocketError err;
1690
1691   if (!m_peer)
1692   {
1693     m_error = GSOCK_INVADDR;
1694     return -1;
1695   }
1696
1697   err = _GAddress_translate_to(m_peer, &addr, &len);
1698   if (err != GSOCK_NOERROR)
1699   {
1700     m_error = err;
1701     return -1;
1702   }
1703
1704   MASK_SIGNAL();
1705
1706   do
1707   {
1708     ret = sendto(m_fd, (char *)buffer, size, 0, addr, len);
1709   }
1710   while (ret == -1 && errno == EINTR); /* Loop until not interrupted */
1711
1712   UNMASK_SIGNAL();
1713
1714   /* Frees memory allocated from _GAddress_translate_to */
1715   free(addr);
1716
1717   return ret;
1718 }
1719
1720 void GSocket::Detected_Read()
1721 {
1722   char c;
1723
1724   /* Safeguard against straggling call to Detected_Read */
1725   if (m_fd == INVALID_SOCKET)
1726   {
1727     return;
1728   }
1729
1730   /* If we have already detected a LOST event, then don't try
1731    * to do any further processing.
1732    */
1733   if ((m_detected & GSOCK_LOST_FLAG) != 0)
1734   {
1735     m_establishing = false;
1736
1737     CALL_CALLBACK(this, GSOCK_LOST);
1738     Shutdown();
1739     return;
1740   }
1741
1742   int num =  recv(m_fd, &c, 1, MSG_PEEK | GSOCKET_MSG_NOSIGNAL);
1743
1744   if (num > 0)
1745   {
1746     CALL_CALLBACK(this, GSOCK_INPUT);
1747   }
1748   else
1749   {
1750     if (m_server && m_stream)
1751     {
1752       CALL_CALLBACK(this, GSOCK_CONNECTION);
1753     }
1754     else if (num == 0)
1755     {
1756       /* graceful shutdown */
1757       CALL_CALLBACK(this, GSOCK_LOST);
1758       Shutdown();
1759     }
1760     else
1761     {
1762       /* Do not throw a lost event in cases where the socket isn't really lost */
1763       if ((errno == EWOULDBLOCK) || (errno == EAGAIN) || (errno == EINTR))
1764       {
1765         CALL_CALLBACK(this, GSOCK_INPUT);
1766       }
1767       else
1768       {
1769         CALL_CALLBACK(this, GSOCK_LOST);
1770         Shutdown();
1771       }
1772     }
1773   }
1774 }
1775
1776 void GSocket::Detected_Write()
1777 {
1778   /* If we have already detected a LOST event, then don't try
1779    * to do any further processing.
1780    */
1781   if ((m_detected & GSOCK_LOST_FLAG) != 0)
1782   {
1783     m_establishing = false;
1784
1785     CALL_CALLBACK(this, GSOCK_LOST);
1786     Shutdown();
1787     return;
1788   }
1789
1790   if (m_establishing && !m_server)
1791   {
1792     int error;
1793     SOCKOPTLEN_T len = sizeof(error);
1794
1795     m_establishing = false;
1796
1797     getsockopt(m_fd, SOL_SOCKET, SO_ERROR, (char*)&error, &len);
1798
1799     if (error)
1800     {
1801       CALL_CALLBACK(this, GSOCK_LOST);
1802       Shutdown();
1803     }
1804     else
1805     {
1806       CALL_CALLBACK(this, GSOCK_CONNECTION);
1807       /* We have to fire this event by hand because CONNECTION (for clients)
1808        * and OUTPUT are internally the same and we just disabled CONNECTION
1809        * events with the above macro.
1810        */
1811       CALL_CALLBACK(this, GSOCK_OUTPUT);
1812     }
1813   }
1814   else
1815   {
1816     CALL_CALLBACK(this, GSOCK_OUTPUT);
1817   }
1818 }
1819
1820 /* Compatibility functions for GSocket */
1821 GSocket *GSocket_new(void)
1822 {
1823     GSocket *newsocket = new GSocket();
1824     if (newsocket->IsOk())
1825         return newsocket;
1826
1827     delete newsocket;
1828
1829     return NULL;
1830 }
1831
1832 /*
1833  * -------------------------------------------------------------------------
1834  * GAddress
1835  * -------------------------------------------------------------------------
1836  */
1837
1838 /* CHECK_ADDRESS verifies that the current address family is either
1839  * GSOCK_NOFAMILY or GSOCK_*family*, and if it is GSOCK_NOFAMILY, it
1840  * initalizes it to be a GSOCK_*family*. In other cases, it returns
1841  * an appropiate error code.
1842  *
1843  * CHECK_ADDRESS_RETVAL does the same but returning 'retval' on error.
1844  */
1845 #define CHECK_ADDRESS(address, family)                              \
1846 {                                                                   \
1847   if (address->m_family == GSOCK_NOFAMILY)                          \
1848     if (_GAddress_Init_##family(address) != GSOCK_NOERROR)          \
1849       return address->m_error;                                      \
1850   if (address->m_family != GSOCK_##family)                          \
1851   {                                                                 \
1852     address->m_error = GSOCK_INVADDR;                               \
1853     return GSOCK_INVADDR;                                           \
1854   }                                                                 \
1855 }
1856
1857 #define CHECK_ADDRESS_RETVAL(address, family, retval)               \
1858 {                                                                   \
1859   if (address->m_family == GSOCK_NOFAMILY)                          \
1860     if (_GAddress_Init_##family(address) != GSOCK_NOERROR)          \
1861       return retval;                                                \
1862   if (address->m_family != GSOCK_##family)                          \
1863   {                                                                 \
1864     address->m_error = GSOCK_INVADDR;                               \
1865     return retval;                                                  \
1866   }                                                                 \
1867 }
1868
1869
1870 GAddress *GAddress_new(void)
1871 {
1872   GAddress *address;
1873
1874   if ((address = (GAddress *) malloc(sizeof(GAddress))) == NULL)
1875     return NULL;
1876
1877   address->m_family  = GSOCK_NOFAMILY;
1878   address->m_addr    = NULL;
1879   address->m_len     = 0;
1880
1881   return address;
1882 }
1883
1884 GAddress *GAddress_copy(GAddress *address)
1885 {
1886   GAddress *addr2;
1887
1888   assert(address != NULL);
1889
1890   if ((addr2 = (GAddress *) malloc(sizeof(GAddress))) == NULL)
1891     return NULL;
1892
1893   memcpy(addr2, address, sizeof(GAddress));
1894
1895   if (address->m_addr && address->m_len > 0)
1896   {
1897     addr2->m_addr = (struct sockaddr *)malloc(addr2->m_len);
1898     if (addr2->m_addr == NULL)
1899     {
1900       free(addr2);
1901       return NULL;
1902     }
1903     memcpy(addr2->m_addr, address->m_addr, addr2->m_len);
1904   }
1905
1906   return addr2;
1907 }
1908
1909 void GAddress_destroy(GAddress *address)
1910 {
1911   assert(address != NULL);
1912
1913   if (address->m_addr)
1914     free(address->m_addr);
1915
1916   free(address);
1917 }
1918
1919 void GAddress_SetFamily(GAddress *address, GAddressType type)
1920 {
1921   assert(address != NULL);
1922
1923   address->m_family = type;
1924 }
1925
1926 GAddressType GAddress_GetFamily(GAddress *address)
1927 {
1928   assert(address != NULL);
1929
1930   return address->m_family;
1931 }
1932
1933 GSocketError _GAddress_translate_from(GAddress *address,
1934                                       struct sockaddr *addr, int len)
1935 {
1936   address->m_realfamily = addr->sa_family;
1937   switch (addr->sa_family)
1938   {
1939     case AF_INET:
1940       address->m_family = GSOCK_INET;
1941       break;
1942     case AF_UNIX:
1943       address->m_family = GSOCK_UNIX;
1944       break;
1945 #ifdef AF_INET6
1946     case AF_INET6:
1947       address->m_family = GSOCK_INET6;
1948       break;
1949 #endif
1950     default:
1951     {
1952       address->m_error = GSOCK_INVOP;
1953       return GSOCK_INVOP;
1954     }
1955   }
1956
1957   if (address->m_addr)
1958     free(address->m_addr);
1959
1960   address->m_len  = len;
1961   address->m_addr = (struct sockaddr *)malloc(len);
1962
1963   if (address->m_addr == NULL)
1964   {
1965     address->m_error = GSOCK_MEMERR;
1966     return GSOCK_MEMERR;
1967   }
1968
1969   memcpy(address->m_addr, addr, len);
1970
1971   return GSOCK_NOERROR;
1972 }
1973
1974 GSocketError _GAddress_translate_to(GAddress *address,
1975                                     struct sockaddr **addr, int *len)
1976 {
1977   if (!address->m_addr)
1978   {
1979     address->m_error = GSOCK_INVADDR;
1980     return GSOCK_INVADDR;
1981   }
1982
1983   *len = address->m_len;
1984   *addr = (struct sockaddr *)malloc(address->m_len);
1985   if (*addr == NULL)
1986   {
1987     address->m_error = GSOCK_MEMERR;
1988     return GSOCK_MEMERR;
1989   }
1990
1991   memcpy(*addr, address->m_addr, address->m_len);
1992   return GSOCK_NOERROR;
1993 }
1994
1995 /*
1996  * -------------------------------------------------------------------------
1997  * Internet address family
1998  * -------------------------------------------------------------------------
1999  */
2000
2001 GSocketError _GAddress_Init_INET(GAddress *address)
2002 {
2003   address->m_len  = sizeof(struct sockaddr_in);
2004   address->m_addr = (struct sockaddr *) malloc(address->m_len);
2005   if (address->m_addr == NULL)
2006   {
2007     address->m_error = GSOCK_MEMERR;
2008     return GSOCK_MEMERR;
2009   }
2010
2011   address->m_family = GSOCK_INET;
2012   address->m_realfamily = PF_INET;
2013   ((struct sockaddr_in *)address->m_addr)->sin_family = AF_INET;
2014   ((struct sockaddr_in *)address->m_addr)->sin_addr.s_addr = INADDR_ANY;
2015
2016   return GSOCK_NOERROR;
2017 }
2018
2019 GSocketError GAddress_INET_SetHostName(GAddress *address, const char *hostname)
2020 {
2021   struct hostent *he;
2022   struct in_addr *addr;
2023
2024   assert(address != NULL);
2025
2026   CHECK_ADDRESS(address, INET);
2027
2028   addr = &(((struct sockaddr_in *)address->m_addr)->sin_addr);
2029
2030   /* If it is a numeric host name, convert it now */
2031 #if defined(HAVE_INET_ATON)
2032   if (inet_aton(hostname, addr) == 0)
2033   {
2034 #elif defined(HAVE_INET_ADDR)
2035   if ( (addr->s_addr = inet_addr(hostname)) == (unsigned)-1 )
2036   {
2037 #else
2038   /* Use gethostbyname by default */
2039 #ifndef __WXMAC__
2040   int val = 1;  /* VA doesn't like constants in conditional expressions */
2041   if (val)
2042 #endif
2043   {
2044 #endif
2045     struct in_addr *array_addr;
2046
2047     /* It is a real name, we solve it */
2048     struct hostent h;
2049 #if defined(HAVE_FUNC_GETHOSTBYNAME_R_3)
2050     struct hostent_data buffer;
2051 #else
2052     char buffer[1024];
2053 #endif
2054     int err;
2055     he = wxGethostbyname_r(hostname, &h, (void*)&buffer, sizeof(buffer), &err);
2056     if (he == NULL)
2057     {
2058       /* Reset to invalid address */
2059       addr->s_addr = INADDR_NONE;
2060       address->m_error = GSOCK_NOHOST;
2061       return GSOCK_NOHOST;
2062     }
2063
2064     array_addr = (struct in_addr *) *(he->h_addr_list);
2065     addr->s_addr = array_addr[0].s_addr;
2066   }
2067
2068   return GSOCK_NOERROR;
2069 }
2070
2071 GSocketError GAddress_INET_SetAnyAddress(GAddress *address)
2072 {
2073   return GAddress_INET_SetHostAddress(address, INADDR_ANY);
2074 }
2075
2076 GSocketError GAddress_INET_SetHostAddress(GAddress *address,
2077                                           unsigned long hostaddr)
2078 {
2079   struct in_addr *addr;
2080
2081   assert(address != NULL);
2082
2083   CHECK_ADDRESS(address, INET);
2084
2085   addr = &(((struct sockaddr_in *)address->m_addr)->sin_addr);
2086   addr->s_addr = htonl(hostaddr);
2087
2088   return GSOCK_NOERROR;
2089 }
2090
2091 GSocketError GAddress_INET_SetPortName(GAddress *address, const char *port,
2092                                        const char *protocol)
2093 {
2094   struct servent *se;
2095   struct sockaddr_in *addr;
2096
2097   assert(address != NULL);
2098   CHECK_ADDRESS(address, INET);
2099
2100   if (!port)
2101   {
2102     address->m_error = GSOCK_INVPORT;
2103     return GSOCK_INVPORT;
2104   }
2105
2106 #if defined(HAVE_FUNC_GETSERVBYNAME_R_4)
2107     struct servent_data buffer;
2108 #else
2109   char buffer[1024];
2110 #endif
2111   struct servent serv;
2112   se = wxGetservbyname_r(port, protocol, &serv,
2113                          (void*)&buffer, sizeof(buffer));
2114   if (!se)
2115   {
2116     /* the cast to int suppresses compiler warnings about subscript having the
2117        type char */
2118     if (isdigit((int)port[0]))
2119     {
2120       int port_int;
2121
2122       port_int = atoi(port);
2123       addr = (struct sockaddr_in *)address->m_addr;
2124       addr->sin_port = htons(port_int);
2125       return GSOCK_NOERROR;
2126     }
2127
2128     address->m_error = GSOCK_INVPORT;
2129     return GSOCK_INVPORT;
2130   }
2131
2132   addr = (struct sockaddr_in *)address->m_addr;
2133   addr->sin_port = se->s_port;
2134
2135   return GSOCK_NOERROR;
2136 }
2137
2138 GSocketError GAddress_INET_SetPort(GAddress *address, unsigned short port)
2139 {
2140   struct sockaddr_in *addr;
2141
2142   assert(address != NULL);
2143   CHECK_ADDRESS(address, INET);
2144
2145   addr = (struct sockaddr_in *)address->m_addr;
2146   addr->sin_port = htons(port);
2147
2148   return GSOCK_NOERROR;
2149 }
2150
2151 GSocketError GAddress_INET_GetHostName(GAddress *address, char *hostname, size_t sbuf)
2152 {
2153   struct hostent *he;
2154   char *addr_buf;
2155   struct sockaddr_in *addr;
2156
2157   assert(address != NULL);
2158   CHECK_ADDRESS(address, INET);
2159
2160   addr = (struct sockaddr_in *)address->m_addr;
2161   addr_buf = (char *)&(addr->sin_addr);
2162
2163   struct hostent temphost;
2164 #if defined(HAVE_FUNC_GETHOSTBYNAME_R_3)
2165   struct hostent_data buffer;
2166 #else
2167   char buffer[1024];
2168 #endif
2169   int err;
2170   he = wxGethostbyaddr_r(addr_buf, sizeof(addr->sin_addr), AF_INET, &temphost,
2171                          (void*)&buffer, sizeof(buffer), &err);
2172   if (he == NULL)
2173   {
2174     address->m_error = GSOCK_NOHOST;
2175     return GSOCK_NOHOST;
2176   }
2177
2178   strncpy(hostname, he->h_name, sbuf);
2179
2180   return GSOCK_NOERROR;
2181 }
2182
2183 unsigned long GAddress_INET_GetHostAddress(GAddress *address)
2184 {
2185   struct sockaddr_in *addr;
2186
2187   assert(address != NULL);
2188   CHECK_ADDRESS_RETVAL(address, INET, 0);
2189
2190   addr = (struct sockaddr_in *)address->m_addr;
2191
2192   return ntohl(addr->sin_addr.s_addr);
2193 }
2194
2195 unsigned short GAddress_INET_GetPort(GAddress *address)
2196 {
2197   struct sockaddr_in *addr;
2198
2199   assert(address != NULL);
2200   CHECK_ADDRESS_RETVAL(address, INET, 0);
2201
2202   addr = (struct sockaddr_in *)address->m_addr;
2203   return ntohs(addr->sin_port);
2204 }
2205
2206 /*
2207  * -------------------------------------------------------------------------
2208  * Unix address family
2209  * -------------------------------------------------------------------------
2210  */
2211
2212 #ifndef __VISAGECPP__
2213 GSocketError _GAddress_Init_UNIX(GAddress *address)
2214 {
2215   address->m_len  = sizeof(struct sockaddr_un);
2216   address->m_addr = (struct sockaddr *)malloc(address->m_len);
2217   if (address->m_addr == NULL)
2218   {
2219     address->m_error = GSOCK_MEMERR;
2220     return GSOCK_MEMERR;
2221   }
2222
2223   address->m_family = GSOCK_UNIX;
2224   address->m_realfamily = PF_UNIX;
2225   ((struct sockaddr_un *)address->m_addr)->sun_family = AF_UNIX;
2226   ((struct sockaddr_un *)address->m_addr)->sun_path[0] = 0;
2227
2228   return GSOCK_NOERROR;
2229 }
2230
2231 #define UNIX_SOCK_PATHLEN (sizeof(addr->sun_path)/sizeof(addr->sun_path[0]))
2232
2233 GSocketError GAddress_UNIX_SetPath(GAddress *address, const char *path)
2234 {
2235   struct sockaddr_un *addr;
2236
2237   assert(address != NULL);
2238
2239   CHECK_ADDRESS(address, UNIX);
2240
2241   addr = ((struct sockaddr_un *)address->m_addr);
2242   strncpy(addr->sun_path, path, UNIX_SOCK_PATHLEN);
2243   addr->sun_path[UNIX_SOCK_PATHLEN - 1] = '\0';
2244
2245   return GSOCK_NOERROR;
2246 }
2247
2248 GSocketError GAddress_UNIX_GetPath(GAddress *address, char *path, size_t sbuf)
2249 {
2250   struct sockaddr_un *addr;
2251
2252   assert(address != NULL);
2253   CHECK_ADDRESS(address, UNIX);
2254
2255   addr = (struct sockaddr_un *)address->m_addr;
2256
2257   strncpy(path, addr->sun_path, sbuf);
2258
2259   return GSOCK_NOERROR;
2260 }
2261 #endif  /* !defined(__VISAGECPP__) */
2262 #endif  /* wxUSE_SOCKETS || defined(__GSOCKET_STANDALONE__) */