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