src/unix/gsocket.c

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