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 wxWindows 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   /* allow a socket to re-bind if the socket is in the TIME_WAIT
 487      state after being previously closed.
 488    */
 489   setsockopt(sck->m_fd, SOL_SOCKET, SO_REUSEADDR, (const char*)&arg, sizeof(u_long));
 490
 491   /* Bind to the local address,
 492    * retrieve the actual address bound,
 493    * and listen up to 5 connections.
 494    */
 495   if ((bind(sck->m_fd, sck->m_local->m_addr, sck->m_local->m_len) != 0) ||
 496       (getsockname(sck->m_fd,
 497                    sck->m_local->m_addr,
 498                    (SOCKLEN_T *) &sck->m_local->m_len) != 0) ||
 499       (listen(sck->m_fd, 5) != 0))
 500   {
 501     GSocket_close(sck);
 502     sck->m_error = GSOCK_IOERR;
 503     return GSOCK_IOERR;
 504   }
 505
 506   return GSOCK_NOERROR;
 507 }
 508
 509 /* GSocket_WaitConnection:
 510  *  Waits for an incoming client connection. Returns a pointer to
 511  *  a GSocket object, or NULL if there was an error, in which case
 512  *  the last error field will be updated for the calling GSocket.
 513  *
 514  *  Error codes (set in the calling GSocket)
 515  *    GSOCK_INVSOCK    - the socket is not valid or not a server.
 516  *    GSOCK_TIMEDOUT   - timeout, no incoming connections.
 517  *    GSOCK_WOULDBLOCK - the call would block and the socket is nonblocking.
 518  *    GSOCK_MEMERR     - couldn't allocate memory.
 519  *    GSOCK_IOERR      - low-level error.
 520  */
 521 GSocket *GSocket_WaitConnection(GSocket *socket)
 522 {
 523   struct sockaddr from;
 524   SOCKLEN_T fromlen = sizeof(from);
 525   GSocket *connection;
 526   GSocketError err;
 527   int arg = 1;
 528
 529   assert(socket != NULL);
 530
 531   /* Reenable CONNECTION events */
 532   _GSocket_Enable(socket, GSOCK_CONNECTION);
 533
 534   /* If the socket has already been created, we exit immediately */
 535   if (socket->m_fd == INVALID_SOCKET || !socket->m_server)
 536   {
 537     socket->m_error = GSOCK_INVSOCK;
 538     return NULL;
 539   }
 540
 541   /* Create a GSocket object for the new connection */
 542   connection = GSocket_new();
 543
 544   if (!connection)
 545   {
 546     socket->m_error = GSOCK_MEMERR;
 547     return NULL;
 548   }
 549
 550   /* Wait for a connection (with timeout) */
 551   if (_GSocket_Input_Timeout(socket) == GSOCK_TIMEDOUT)
 552   {
 553     GSocket_destroy(connection);
 554     /* socket->m_error set by _GSocket_Input_Timeout */
 555     return NULL;
 556   }
 557
 558   connection->m_fd = accept(socket->m_fd, &from, (SOCKLEN_T *) &fromlen);
 559
 560   if (connection->m_fd == INVALID_SOCKET)
 561   {
 562     if (errno == EWOULDBLOCK)
 563       socket->m_error = GSOCK_WOULDBLOCK;
 564     else
 565       socket->m_error = GSOCK_IOERR;
 566
 567     GSocket_destroy(connection);
 568     return NULL;
 569   }
 570
 571   /* Initialize all fields */
 572   connection->m_server   = FALSE;
 573   connection->m_stream   = TRUE;
 574   connection->m_oriented = TRUE;
 575
 576   /* Setup the peer address field */
 577   connection->m_peer = GAddress_new();
 578   if (!connection->m_peer)
 579   {
 580     GSocket_destroy(connection);
 581     socket->m_error = GSOCK_MEMERR;
 582     return NULL;
 583   }
 584   err = _GAddress_translate_from(connection->m_peer, &from, fromlen);
 585   if (err != GSOCK_NOERROR)
 586   {
 587     GAddress_destroy(connection->m_peer);
 588     GSocket_destroy(connection);
 589     socket->m_error = err;
 590     return NULL;
 591   }
 592 #if defined(__EMX__) || defined(__VISAGECPP__)
 593   ioctl(connection->m_fd, FIONBIO, (char*)&arg, sizeof(arg));
 594 #else
 595   ioctl(connection->m_fd, FIONBIO, &arg);
 596 #endif
 597   _GSocket_Enable_Events(connection);
 598
 599   return connection;
 600 }
 601
 602 /* Client specific parts */
 603
 604 /* GSocket_Connect:
 605  *  For stream (connection oriented) sockets, GSocket_Connect() tries
 606  *  to establish a client connection to a server using the peer address
 607  *  as established with GSocket_SetPeer(). Returns GSOCK_NOERROR if the
 608  *  connection has been succesfully established, or one of the error
 609  *  codes listed below. Note that for nonblocking sockets, a return
 610  *  value of GSOCK_WOULDBLOCK doesn't mean a failure. The connection
 611  *  request can be completed later; you should use GSocket_Select()
 612  *  to poll for GSOCK_CONNECTION | GSOCK_LOST, or wait for the
 613  *  corresponding asynchronous events.
 614  *
 615  *  For datagram (non connection oriented) sockets, GSocket_Connect()
 616  *  just sets the peer address established with GSocket_SetPeer() as
 617  *  default destination.
 618  *
 619  *  Error codes:
 620  *    GSOCK_INVSOCK    - the socket is in use or not valid.
 621  *    GSOCK_INVADDR    - the peer address has not been established.
 622  *    GSOCK_TIMEDOUT   - timeout, the connection failed.
 623  *    GSOCK_WOULDBLOCK - connection in progress (nonblocking sockets only)
 624  *    GSOCK_MEMERR     - couldn't allocate memory.
 625  *    GSOCK_IOERR      - low-level error.
 626  */
 627 GSocketError GSocket_Connect(GSocket *sck, GSocketStream stream)
 628 {
 629   int err, ret;
 630   int arg = 1;
 631
 632   assert(sck != NULL);
 633
 634   /* Enable CONNECTION events (needed for nonblocking connections) */
 635   _GSocket_Enable(sck, GSOCK_CONNECTION);
 636
 637   if (sck->m_fd != INVALID_SOCKET)
 638   {
 639     sck->m_error = GSOCK_INVSOCK;
 640     return GSOCK_INVSOCK;
 641   }
 642
 643   if (!sck->m_peer)
 644   {
 645     sck->m_error = GSOCK_INVADDR;
 646     return GSOCK_INVADDR;
 647   }
 648
 649   /* Streamed or dgram socket? */
 650   sck->m_stream   = (stream == GSOCK_STREAMED);
 651   sck->m_oriented = TRUE;
 652   sck->m_server   = FALSE;
 653   sck->m_establishing = FALSE;
 654
 655   /* Create the socket */
 656   sck->m_fd = socket(sck->m_peer->m_realfamily,
 657                      sck->m_stream? SOCK_STREAM : SOCK_DGRAM, 0);
 658
 659   if (sck->m_fd == INVALID_SOCKET)
 660   {
 661     sck->m_error = GSOCK_IOERR;
 662     return GSOCK_IOERR;
 663   }
 664 #if defined(__EMX__) || defined(__VISAGECPP__)
 665   ioctl(sck->m_fd, FIONBIO, (char*)&arg, sizeof(arg));
 666 #else
 667   ioctl(sck->m_fd, FIONBIO, &arg);
 668 #endif
 669   _GSocket_Enable_Events(sck);
 670
 671   /* Connect it to the peer address, with a timeout (see below) */
 672   ret = connect(sck->m_fd, sck->m_peer->m_addr, sck->m_peer->m_len);
 673
 674   if (ret == -1)
 675   {
 676     err = errno;
 677
 678     /* If connect failed with EINPROGRESS and the GSocket object
 679      * is in blocking mode, we select() for the specified timeout
 680      * checking for writability to see if the connection request
 681      * completes.
 682      */
 683     if ((err == EINPROGRESS) && (!sck->m_non_blocking))
 684     {
 685       if (_GSocket_Output_Timeout(sck) == GSOCK_TIMEDOUT)
 686       {
 687         GSocket_close(sck);
 688         /* sck->m_error is set in _GSocket_Output_Timeout */
 689         return GSOCK_TIMEDOUT;
 690       }
 691       else
 692       {
 693         int error;
 694         SOCKLEN_T len = sizeof(error);
 695
 696         getsockopt(sck->m_fd, SOL_SOCKET, SO_ERROR, (void*) &error, &len);
 697
 698         if (!error)
 699           return GSOCK_NOERROR;
 700       }
 701     }
 702
 703     /* If connect failed with EINPROGRESS and the GSocket object
 704      * is set to nonblocking, we set m_error to GSOCK_WOULDBLOCK
 705      * (and return GSOCK_WOULDBLOCK) but we don't close the socket;
 706      * this way if the connection completes, a GSOCK_CONNECTION
 707      * event will be generated, if enabled.
 708      */
 709     if ((err == EINPROGRESS) && (sck->m_non_blocking))
 710     {
 711       sck->m_establishing = TRUE;
 712       sck->m_error = GSOCK_WOULDBLOCK;
 713       return GSOCK_WOULDBLOCK;
 714     }
 715
 716     /* If connect failed with an error other than EINPROGRESS,
 717      * then the call to GSocket_Connect has failed.
 718      */
 719     GSocket_close(sck);
 720     sck->m_error = GSOCK_IOERR;
 721     return GSOCK_IOERR;
 722   }
 723
 724   return GSOCK_NOERROR;
 725 }
 726
 727 /* Datagram sockets */
 728
 729 /* GSocket_SetNonOriented:
 730  *  Sets up this socket as a non-connection oriented (datagram) socket.
 731  *  Before using this function, the local address must have been set
 732  *  with GSocket_SetLocal(), or the call will fail. Returns GSOCK_NOERROR
 733  *  on success, or one of the following otherwise.
 734  *
 735  *  Error codes:
 736  *    GSOCK_INVSOCK - the socket is in use.
 737  *    GSOCK_INVADDR - the local address has not been set.
 738  *    GSOCK_IOERR   - low-level error.
 739  */
 740 GSocketError GSocket_SetNonOriented(GSocket *sck)
 741 {
 742   int arg = 1;
 743
 744   assert(sck != NULL);
 745
 746   if (sck->m_fd != INVALID_SOCKET)
 747   {
 748     sck->m_error = GSOCK_INVSOCK;
 749     return GSOCK_INVSOCK;
 750   }
 751
 752   if (!sck->m_local)
 753   {
 754     sck->m_error = GSOCK_INVADDR;
 755     return GSOCK_INVADDR;
 756   }
 757
 758   /* Initialize all fields */
 759   sck->m_stream   = FALSE;
 760   sck->m_server   = FALSE;
 761   sck->m_oriented = FALSE;
 762
 763   /* Create the socket */
 764   sck->m_fd = socket(sck->m_local->m_realfamily, SOCK_DGRAM, 0);
 765
 766   if (sck->m_fd == INVALID_SOCKET)
 767   {
 768     sck->m_error = GSOCK_IOERR;
 769     return GSOCK_IOERR;
 770   }
 771 #if defined(__EMX__) || defined(__VISAGECPP__)
 772   ioctl(sck->m_fd, FIONBIO, (char*)&arg, sizeof(arg));
 773 #else
 774   ioctl(sck->m_fd, FIONBIO, &arg);
 775 #endif
 776   _GSocket_Enable_Events(sck);
 777
 778   /* Bind to the local address,
 779    * and retrieve the actual address bound.
 780    */
 781   if ((bind(sck->m_fd, sck->m_local->m_addr, sck->m_local->m_len) != 0) ||
 782       (getsockname(sck->m_fd,
 783                    sck->m_local->m_addr,
 784                    (SOCKLEN_T *) &sck->m_local->m_len) != 0))
 785   {
 786     GSocket_close(sck);
 787     sck->m_error = GSOCK_IOERR;
 788     return GSOCK_IOERR;
 789   }
 790
 791   return GSOCK_NOERROR;
 792 }
 793
 794 /* Generic IO */
 795
 796 /* Like recv(), send(), ... */
 797 int GSocket_Read(GSocket *socket, char *buffer, int size)
 798 {
 799   int ret;
 800
 801   assert(socket != NULL);
 802
 803   /* When using CFSocket we MUST NOT reenable events until we finish reading */
 804 #ifndef __DARWIN__
 805   /* Reenable INPUT events */
 806   _GSocket_Enable(socket, GSOCK_INPUT);
 807 #endif
 808
 809   if (socket->m_fd == INVALID_SOCKET || socket->m_server)
 810   {
 811     socket->m_error = GSOCK_INVSOCK;
 812     return -1;
 813   }
 814
 815   /* If the socket is blocking, wait for data (with a timeout) */
 816   if (_GSocket_Input_Timeout(socket) == GSOCK_TIMEDOUT)
 817     return -1;
 818
 819   /* Read the data */
 820   if (socket->m_stream)
 821     ret = _GSocket_Recv_Stream(socket, buffer, size);
 822   else
 823     ret = _GSocket_Recv_Dgram(socket, buffer, size);
 824
 825   if (ret == -1)
 826   {
 827     if (errno == EWOULDBLOCK)
 828       socket->m_error = GSOCK_WOULDBLOCK;
 829     else
 830       socket->m_error = GSOCK_IOERR;
 831   }
 832
 833 #ifdef __DARWIN__
 834   /* Reenable INPUT events */
 835   _GSocket_Enable(socket, GSOCK_INPUT);
 836 #endif
 837
 838   return ret;
 839 }
 840
 841 int GSocket_Write(GSocket *socket, const char *buffer, int size)
 842 {
 843   int ret;
 844
 845   assert(socket != NULL);
 846
 847   GSocket_Debug(( "GSocket_Write #1, size %d\n", size ));
 848
 849   if (socket->m_fd == INVALID_SOCKET || socket->m_server)
 850   {
 851     socket->m_error = GSOCK_INVSOCK;
 852     return -1;
 853   }
 854
 855   GSocket_Debug(( "GSocket_Write #2, size %d\n", size ));
 856
 857   /* If the socket is blocking, wait for writability (with a timeout) */
 858   if (_GSocket_Output_Timeout(socket) == GSOCK_TIMEDOUT)
 859     return -1;
 860
 861   GSocket_Debug(( "GSocket_Write #3, size %d\n", size ));
 862
 863   /* Write the data */
 864   if (socket->m_stream)
 865     ret = _GSocket_Send_Stream(socket, buffer, size);
 866   else
 867     ret = _GSocket_Send_Dgram(socket, buffer, size);
 868
 869   GSocket_Debug(( "GSocket_Write #4, size %d\n", size ));
 870
 871   if (ret == -1)
 872   {
 873     if (errno == EWOULDBLOCK)
 874     {
 875       socket->m_error = GSOCK_WOULDBLOCK;
 876       GSocket_Debug(( "GSocket_Write error WOULDBLOCK\n" ));
 877     }
 878     else
 879     {
 880       socket->m_error = GSOCK_IOERR;
 881       GSocket_Debug(( "GSocket_Write error IOERR\n" ));
 882     }
 883
 884     /* Only reenable OUTPUT events after an error (just like WSAAsyncSelect
 885      * in MSW). Once the first OUTPUT event is received, users can assume
 886      * that the socket is writable until a read operation fails. Only then
 887      * will further OUTPUT events be posted.
 888      */
 889     _GSocket_Enable(socket, GSOCK_OUTPUT);
 890     return -1;
 891   }
 892
 893   GSocket_Debug(( "GSocket_Write #5, size %d ret %d\n", size, ret ));
 894
 895   return ret;
 896 }
 897
 898 /* GSocket_Select:
 899  *  Polls the socket to determine its status. This function will
 900  *  check for the events specified in the 'flags' parameter, and
 901  *  it will return a mask indicating which operations can be
 902  *  performed. This function won't block, regardless of the
 903  *  mode (blocking | nonblocking) of the socket.
 904  */
 905 GSocketEventFlags GSocket_Select(GSocket *socket, GSocketEventFlags flags)
 906 {
 907   if (!USE_GUI())
 908   {
 909
 910     GSocketEventFlags result = 0;
 911     fd_set readfds;
 912     fd_set writefds;
 913     fd_set exceptfds;
 914     struct timeval tv;
 915
 916     /* Do not use a static struct, Linux can garble it */
 917     tv.tv_sec = socket->m_timeout / 1000;
 918     tv.tv_usec = (socket->m_timeout % 1000) / 1000;
 919
 920     assert(socket != NULL);
 921
 922     FD_ZERO(&readfds);
 923     FD_ZERO(&writefds);
 924     FD_ZERO(&exceptfds);
 925     FD_SET(socket->m_fd, &readfds);
 926     if (flags & GSOCK_OUTPUT_FLAG)
 927       FD_SET(socket->m_fd, &writefds);
 928     FD_SET(socket->m_fd, &exceptfds);
 929
 930     /* Check 'sticky' CONNECTION flag first */
 931     result |= (GSOCK_CONNECTION_FLAG & socket->m_detected);
 932
 933     /* If we have already detected a LOST event, then don't try
 934      * to do any further processing.
 935      */
 936     if ((socket->m_detected & GSOCK_LOST_FLAG) != 0)
 937     {
 938       socket->m_establishing = FALSE;
 939
 940       return (GSOCK_LOST_FLAG & flags);
 941     }
 942
 943     /* Try select now */
 944     if (select(socket->m_fd + 1, &readfds, &writefds, &exceptfds, &tv) <= 0)
 945     {
 946       /* What to do here? */
 947       return (result & flags);
 948     }
 949
 950     /* Check for readability */
 951     if (FD_ISSET(socket->m_fd, &readfds))
 952     {
 953       char c;
 954
 955       if (recv(socket->m_fd, &c, 1, MSG_PEEK) > 0)
 956       {
 957         result |= GSOCK_INPUT_FLAG;
 958       }
 959       else
 960       {
 961         if (socket->m_server && socket->m_stream)
 962         {
 963           result |= GSOCK_CONNECTION_FLAG;
 964           socket->m_detected |= GSOCK_CONNECTION_FLAG;
 965         }
 966         else
 967         {
 968           socket->m_detected = GSOCK_LOST_FLAG;
 969           socket->m_establishing = FALSE;
 970
 971           /* LOST event: Abort any further processing */
 972           return (GSOCK_LOST_FLAG & flags);
 973         }
 974       }
 975     }
 976
 977     /* Check for writability */
 978     if (FD_ISSET(socket->m_fd, &writefds))
 979     {
 980       if (socket->m_establishing && !socket->m_server)
 981       {
 982         int error;
 983         SOCKLEN_T len = sizeof(error);
 984
 985         socket->m_establishing = FALSE;
 986
 987         getsockopt(socket->m_fd, SOL_SOCKET, SO_ERROR, (void*)&error, &len);
 988
 989         if (error)
 990         {
 991           socket->m_detected = GSOCK_LOST_FLAG;
 992
 993           /* LOST event: Abort any further processing */
 994           return (GSOCK_LOST_FLAG & flags);
 995         }
 996         else
 997         {
 998           result |= GSOCK_CONNECTION_FLAG;
 999           socket->m_detected |= GSOCK_CONNECTION_FLAG;
1000         }
1001       }
1002       else
1003       {
1004         result |= GSOCK_OUTPUT_FLAG;
1005       }
1006     }
1007
1008     /* Check for exceptions and errors (is this useful in Unices?) */
1009     if (FD_ISSET(socket->m_fd, &exceptfds))
1010     {
1011       socket->m_establishing = FALSE;
1012       socket->m_detected = GSOCK_LOST_FLAG;
1013
1014       /* LOST event: Abort any further processing */
1015       return (GSOCK_LOST_FLAG & flags);
1016     }
1017
1018     return (result & flags);
1019
1020   }
1021   else
1022   {
1023
1024     assert(socket != NULL);
1025     return flags & socket->m_detected;
1026
1027   }
1028 }
1029
1030 /* Flags */
1031
1032 /* GSocket_SetNonBlocking:
1033  *  Sets the socket to non-blocking mode. All IO calls will return
1034  *  immediately.
1035  */
1036 void GSocket_SetNonBlocking(GSocket *socket, int non_block)
1037 {
1038   assert(socket != NULL);
1039
1040   GSocket_Debug( ("GSocket_SetNonBlocking: %d\n", (int)non_block) );
1041
1042   socket->m_non_blocking = non_block;
1043 }
1044
1045 /* GSocket_SetTimeout:
1046  *  Sets the timeout for blocking calls. Time is expressed in
1047  *  milliseconds.
1048  */
1049 void GSocket_SetTimeout(GSocket *socket, unsigned long millisec)
1050 {
1051   assert(socket != NULL);
1052
1053   socket->m_timeout = millisec;
1054 }
1055
1056 /* GSocket_GetError:
1057  *  Returns the last error occured for this socket. Note that successful
1058  *  operations do not clear this back to GSOCK_NOERROR, so use it only
1059  *  after an error.
1060  */
1061 GSocketError GSocket_GetError(GSocket *socket)
1062 {
1063   assert(socket != NULL);
1064
1065   return socket->m_error;
1066 }
1067
1068 /* Callbacks */
1069
1070 /* GSOCK_INPUT:
1071  *   There is data to be read in the input buffer. If, after a read
1072  *   operation, there is still data available, the callback function will
1073  *   be called again.
1074  * GSOCK_OUTPUT:
1075  *   The socket is available for writing. That is, the next write call
1076  *   won't block. This event is generated only once, when the connection is
1077  *   first established, and then only if a call failed with GSOCK_WOULDBLOCK,
1078  *   when the output buffer empties again. This means that the app should
1079  *   assume that it can write since the first OUTPUT event, and no more
1080  *   OUTPUT events will be generated unless an error occurs.
1081  * GSOCK_CONNECTION:
1082  *   Connection succesfully established, for client sockets, or incoming
1083  *   client connection, for server sockets. Wait for this event (also watch
1084  *   out for GSOCK_LOST) after you issue a nonblocking GSocket_Connect() call.
1085  * GSOCK_LOST:
1086  *   The connection is lost (or a connection request failed); this could
1087  *   be due to a failure, or due to the peer closing it gracefully.
1088  */
1089
1090 /* GSocket_SetCallback:
1091  *  Enables the callbacks specified by 'flags'. Note that 'flags'
1092  *  may be a combination of flags OR'ed toghether, so the same
1093  *  callback function can be made to accept different events.
1094  *  The callback function must have the following prototype:
1095  *
1096  *  void function(GSocket *socket, GSocketEvent event, char *cdata)
1097  */
1098 void GSocket_SetCallback(GSocket *socket, GSocketEventFlags flags,
1099                          GSocketCallback callback, char *cdata)
1100 {
1101   int count;
1102
1103   assert(socket != NULL);
1104
1105   for (count = 0; count < GSOCK_MAX_EVENT; count++)
1106   {
1107     if ((flags & (1 << count)) != 0)
1108     {
1109       socket->m_cbacks[count] = callback;
1110       socket->m_data[count] = cdata;
1111     }
1112   }
1113 }
1114
1115 /* GSocket_UnsetCallback:
1116  *  Disables all callbacks specified by 'flags', which may be a
1117  *  combination of flags OR'ed toghether.
1118  */
1119 void GSocket_UnsetCallback(GSocket *socket, GSocketEventFlags flags)
1120 {
1121   int count;
1122
1123   assert(socket != NULL);
1124
1125   for (count = 0; count < GSOCK_MAX_EVENT; count++)
1126   {
1127     if ((flags & (1 << count)) != 0)
1128     {
1129       socket->m_cbacks[count] = NULL;
1130       socket->m_data[count] = NULL;
1131     }
1132   }
1133 }
1134
1135
1136 #define CALL_CALLBACK(socket, event) {                                  \
1137   _GSocket_Disable(socket, event);                                      \
1138   if (socket->m_cbacks[event])                                          \
1139     socket->m_cbacks[event](socket, event, socket->m_data[event]);      \
1140 }
1141
1142
1143 void _GSocket_Enable(GSocket *socket, GSocketEvent event)
1144 {
1145   socket->m_detected &= ~(1 << event);
1146   _GSocket_Install_Callback(socket, event);
1147 }
1148
1149 void _GSocket_Disable(GSocket *socket, GSocketEvent event)
1150 {
1151   socket->m_detected |= (1 << event);
1152   _GSocket_Uninstall_Callback(socket, event);
1153 }
1154
1155 /* _GSocket_Input_Timeout:
1156  *  For blocking sockets, wait until data is available or
1157  *  until timeout ellapses.
1158  */
1159 GSocketError _GSocket_Input_Timeout(GSocket *socket)
1160 {
1161   struct timeval tv;
1162   fd_set readfds;
1163   int ret;
1164
1165   /* Linux select() will overwrite the struct on return */
1166   tv.tv_sec  = (socket->m_timeout / 1000);
1167   tv.tv_usec = (socket->m_timeout % 1000) * 1000;
1168
1169   if (!socket->m_non_blocking)
1170   {
1171     FD_ZERO(&readfds);
1172     FD_SET(socket->m_fd, &readfds);
1173     ret = select(socket->m_fd + 1, &readfds, NULL, NULL, &tv);
1174     if (ret == 0)
1175     {
1176       GSocket_Debug(( "GSocket_Input_Timeout, select returned 0\n" ));
1177       socket->m_error = GSOCK_TIMEDOUT;
1178       return GSOCK_TIMEDOUT;
1179     }
1180     if (ret == -1)
1181     {
1182       GSocket_Debug(( "GSocket_Input_Timeout, select returned -1\n" ));
1183       if (errno == EBADF) { GSocket_Debug(( "Invalid file descriptor\n" )); }
1184       if (errno == EINTR) { GSocket_Debug(( "A non blocked signal was caught\n" )); }
1185       if (errno == EINVAL) { GSocket_Debug(( "The highest number descriptor is negative\n" )); }
1186       if (errno == ENOMEM) { GSocket_Debug(( "Not enough memory\n" )); }
1187       socket->m_error = GSOCK_TIMEDOUT;
1188       return GSOCK_TIMEDOUT;
1189     }
1190   }
1191   return GSOCK_NOERROR;
1192 }
1193
1194 /* _GSocket_Output_Timeout:
1195  *  For blocking sockets, wait until data can be sent without
1196  *  blocking or until timeout ellapses.
1197  */
1198 GSocketError _GSocket_Output_Timeout(GSocket *socket)
1199 {
1200   struct timeval tv;
1201   fd_set writefds;
1202   int ret;
1203
1204   /* Linux select() will overwrite the struct on return */
1205   tv.tv_sec  = (socket->m_timeout / 1000);
1206   tv.tv_usec = (socket->m_timeout % 1000) * 1000;
1207
1208   GSocket_Debug( ("m_non_blocking has: %d\n", (int)socket->m_non_blocking) );
1209
1210   if (!socket->m_non_blocking)
1211   {
1212     FD_ZERO(&writefds);
1213     FD_SET(socket->m_fd, &writefds);
1214     ret = select(socket->m_fd + 1, NULL, &writefds, NULL, &tv);
1215     if (ret == 0)
1216     {
1217       GSocket_Debug(( "GSocket_Output_Timeout, select returned 0\n" ));
1218       socket->m_error = GSOCK_TIMEDOUT;
1219       return GSOCK_TIMEDOUT;
1220     }
1221     if (ret == -1)
1222     {
1223       GSocket_Debug(( "GSocket_Output_Timeout, select returned -1\n" ));
1224       if (errno == EBADF) { GSocket_Debug(( "Invalid file descriptor\n" )); }
1225       if (errno == EINTR) { GSocket_Debug(( "A non blocked signal was caught\n" )); }
1226       if (errno == EINVAL) { GSocket_Debug(( "The highest number descriptor is negative\n" )); }
1227       if (errno == ENOMEM) { GSocket_Debug(( "Not enough memory\n" )); }
1228       socket->m_error = GSOCK_TIMEDOUT;
1229       return GSOCK_TIMEDOUT;
1230     }
1231     if ( ! FD_ISSET(socket->m_fd, &writefds) ) {
1232         GSocket_Debug(( "GSocket_Output_Timeout is buggy!\n" ));
1233     }
1234     else {
1235         GSocket_Debug(( "GSocket_Output_Timeout seems correct\n" ));
1236     }
1237   }
1238   else
1239   {
1240     GSocket_Debug(( "GSocket_Output_Timeout, didn't try select!\n" ));
1241   }
1242
1243   return GSOCK_NOERROR;
1244 }
1245
1246 int _GSocket_Recv_Stream(GSocket *socket, char *buffer, int size)
1247 {
1248   return recv(socket->m_fd, buffer, size, 0);
1249 }
1250
1251 int _GSocket_Recv_Dgram(GSocket *socket, char *buffer, int size)
1252 {
1253   struct sockaddr from;
1254   SOCKLEN_T fromlen = sizeof(from);
1255   int ret;
1256   GSocketError err;
1257
1258   fromlen = sizeof(from);
1259
1260   ret = recvfrom(socket->m_fd, buffer, size, 0, &from, (SOCKLEN_T *) &fromlen);
1261
1262   if (ret == -1)
1263     return -1;
1264
1265   /* Translate a system address into a GSocket address */
1266   if (!socket->m_peer)
1267   {
1268     socket->m_peer = GAddress_new();
1269     if (!socket->m_peer)
1270     {
1271       socket->m_error = GSOCK_MEMERR;
1272       return -1;
1273     }
1274   }
1275   err = _GAddress_translate_from(socket->m_peer, &from, fromlen);
1276   if (err != GSOCK_NOERROR)
1277   {
1278     GAddress_destroy(socket->m_peer);
1279     socket->m_peer  = NULL;
1280     socket->m_error = err;
1281     return -1;
1282   }
1283
1284   return ret;
1285 }
1286
1287 int _GSocket_Send_Stream(GSocket *socket, const char *buffer, int size)
1288 {
1289   int ret;
1290
1291 #ifndef __VISAGECPP__
1292   MASK_SIGNAL();
1293   ret = send(socket->m_fd, buffer, size, 0);
1294   UNMASK_SIGNAL();
1295 #else
1296   ret = send(socket->m_fd, (char *)buffer, size, 0);
1297 #endif
1298
1299   return ret;
1300 }
1301
1302 int _GSocket_Send_Dgram(GSocket *socket, const char *buffer, int size)
1303 {
1304   struct sockaddr *addr;
1305   int len, ret;
1306   GSocketError err;
1307
1308   if (!socket->m_peer)
1309   {
1310     socket->m_error = GSOCK_INVADDR;
1311     return -1;
1312   }
1313
1314   err = _GAddress_translate_to(socket->m_peer, &addr, &len);
1315   if (err != GSOCK_NOERROR)
1316   {
1317     socket->m_error = err;
1318     return -1;
1319   }
1320
1321 #ifndef __VISAGECPP__
1322   MASK_SIGNAL();
1323   ret = sendto(socket->m_fd, buffer, size, 0, addr, len);
1324   UNMASK_SIGNAL();
1325 #else
1326   ret = sendto(socket->m_fd, (char *)buffer, size, 0, addr, len);
1327 #endif
1328
1329   /* Frees memory allocated from _GAddress_translate_to */
1330   free(addr);
1331
1332   return ret;
1333 }
1334
1335 void _GSocket_Detected_Read(GSocket *socket)
1336 {
1337   char c;
1338
1339   /* If we have already detected a LOST event, then don't try
1340    * to do any further processing.
1341    */
1342   if ((socket->m_detected & GSOCK_LOST_FLAG) != 0)
1343   {
1344     socket->m_establishing = FALSE;
1345
1346     CALL_CALLBACK(socket, GSOCK_LOST);
1347     GSocket_Shutdown(socket);
1348     return;
1349   }
1350
1351   if (recv(socket->m_fd, &c, 1, MSG_PEEK) > 0)
1352   {
1353     CALL_CALLBACK(socket, GSOCK_INPUT);
1354   }
1355   else
1356   {
1357     if (socket->m_server && socket->m_stream)
1358     {
1359       CALL_CALLBACK(socket, GSOCK_CONNECTION);
1360     }
1361     else
1362     {
1363       CALL_CALLBACK(socket, GSOCK_LOST);
1364       GSocket_Shutdown(socket);
1365     }
1366   }
1367 }
1368
1369 void _GSocket_Detected_Write(GSocket *socket)
1370 {
1371   /* If we have already detected a LOST event, then don't try
1372    * to do any further processing.
1373    */
1374   if ((socket->m_detected & GSOCK_LOST_FLAG) != 0)
1375   {
1376     socket->m_establishing = FALSE;
1377
1378     CALL_CALLBACK(socket, GSOCK_LOST);
1379     GSocket_Shutdown(socket);
1380     return;
1381   }
1382
1383   if (socket->m_establishing && !socket->m_server)
1384   {
1385     int error;
1386     SOCKLEN_T len = sizeof(error);
1387
1388     socket->m_establishing = FALSE;
1389
1390     getsockopt(socket->m_fd, SOL_SOCKET, SO_ERROR, (void*)&error, &len);
1391
1392     if (error)
1393     {
1394       CALL_CALLBACK(socket, GSOCK_LOST);
1395       GSocket_Shutdown(socket);
1396     }
1397     else
1398     {
1399       CALL_CALLBACK(socket, GSOCK_CONNECTION);
1400       /* We have to fire this event by hand because CONNECTION (for clients)
1401        * and OUTPUT are internally the same and we just disabled CONNECTION
1402        * events with the above macro.
1403        */
1404       CALL_CALLBACK(socket, GSOCK_OUTPUT);
1405     }
1406   }
1407   else
1408   {
1409     CALL_CALLBACK(socket, GSOCK_OUTPUT);
1410   }
1411 }
1412
1413 /*
1414  * -------------------------------------------------------------------------
1415  * GAddress
1416  * -------------------------------------------------------------------------
1417  */
1418
1419 /* CHECK_ADDRESS verifies that the current address family is either
1420  * GSOCK_NOFAMILY or GSOCK_*family*, and if it is GSOCK_NOFAMILY, it
1421  * initalizes it to be a GSOCK_*family*. In other cases, it returns
1422  * an appropiate error code.
1423  *
1424  * CHECK_ADDRESS_RETVAL does the same but returning 'retval' on error.
1425  */
1426 #define CHECK_ADDRESS(address, family)                              \
1427 {                                                                   \
1428   if (address->m_family == GSOCK_NOFAMILY)                          \
1429     if (_GAddress_Init_##family(address) != GSOCK_NOERROR)          \
1430       return address->m_error;                                      \
1431   if (address->m_family != GSOCK_##family)                          \
1432   {                                                                 \
1433     address->m_error = GSOCK_INVADDR;                               \
1434     return GSOCK_INVADDR;                                           \
1435   }                                                                 \
1436 }
1437
1438 #define CHECK_ADDRESS_RETVAL(address, family, retval)               \
1439 {                                                                   \
1440   if (address->m_family == GSOCK_NOFAMILY)                          \
1441     if (_GAddress_Init_##family(address) != GSOCK_NOERROR)          \
1442       return retval;                                                \
1443   if (address->m_family != GSOCK_##family)                          \
1444   {                                                                 \
1445     address->m_error = GSOCK_INVADDR;                               \
1446     return retval;                                                  \
1447   }                                                                 \
1448 }
1449
1450
1451 GAddress *GAddress_new(void)
1452 {
1453   GAddress *address;
1454
1455   if ((address = (GAddress *) malloc(sizeof(GAddress))) == NULL)
1456     return NULL;
1457
1458   address->m_family  = GSOCK_NOFAMILY;
1459   address->m_addr    = NULL;
1460   address->m_len     = 0;
1461
1462   return address;
1463 }
1464
1465 GAddress *GAddress_copy(GAddress *address)
1466 {
1467   GAddress *addr2;
1468
1469   assert(address != NULL);
1470
1471   if ((addr2 = (GAddress *) malloc(sizeof(GAddress))) == NULL)
1472     return NULL;
1473
1474   memcpy(addr2, address, sizeof(GAddress));
1475
1476   if (address->m_addr && address->m_len > 0)
1477   {
1478     addr2->m_addr = (struct sockaddr *)malloc(addr2->m_len);
1479     if (addr2->m_addr == NULL)
1480     {
1481       free(addr2);
1482       return NULL;
1483     }
1484     memcpy(addr2->m_addr, address->m_addr, addr2->m_len);
1485   }
1486
1487   return addr2;
1488 }
1489
1490 void GAddress_destroy(GAddress *address)
1491 {
1492   assert(address != NULL);
1493
1494   if (address->m_addr)
1495     free(address->m_addr);
1496
1497   free(address);
1498 }
1499
1500 void GAddress_SetFamily(GAddress *address, GAddressType type)
1501 {
1502   assert(address != NULL);
1503
1504   address->m_family = type;
1505 }
1506
1507 GAddressType GAddress_GetFamily(GAddress *address)
1508 {
1509   assert(address != NULL);
1510
1511   return address->m_family;
1512 }
1513
1514 GSocketError _GAddress_translate_from(GAddress *address,
1515                                       struct sockaddr *addr, int len)
1516 {
1517   address->m_realfamily = addr->sa_family;
1518   switch (addr->sa_family)
1519   {
1520     case AF_INET:
1521       address->m_family = GSOCK_INET;
1522       break;
1523     case AF_UNIX:
1524       address->m_family = GSOCK_UNIX;
1525       break;
1526 #ifdef AF_INET6
1527     case AF_INET6:
1528       address->m_family = GSOCK_INET6;
1529       break;
1530 #endif
1531     default:
1532     {
1533       address->m_error = GSOCK_INVOP;
1534       return GSOCK_INVOP;
1535     }
1536   }
1537
1538   if (address->m_addr)
1539     free(address->m_addr);
1540
1541   address->m_len  = len;
1542   address->m_addr = (struct sockaddr *)malloc(len);
1543
1544   if (address->m_addr == NULL)
1545   {
1546     address->m_error = GSOCK_MEMERR;
1547     return GSOCK_MEMERR;
1548   }
1549   memcpy(address->m_addr, addr, len);
1550
1551   return GSOCK_NOERROR;
1552 }
1553
1554 GSocketError _GAddress_translate_to(GAddress *address,
1555                                     struct sockaddr **addr, int *len)
1556 {
1557   if (!address->m_addr)
1558   {
1559     address->m_error = GSOCK_INVADDR;
1560     return GSOCK_INVADDR;
1561   }
1562
1563   *len = address->m_len;
1564   *addr = (struct sockaddr *)malloc(address->m_len);
1565   if (*addr == NULL)
1566   {
1567     address->m_error = GSOCK_MEMERR;
1568     return GSOCK_MEMERR;
1569   }
1570
1571   memcpy(*addr, address->m_addr, address->m_len);
1572   return GSOCK_NOERROR;
1573 }
1574
1575 /*
1576  * -------------------------------------------------------------------------
1577  * Internet address family
1578  * -------------------------------------------------------------------------
1579  */
1580
1581 GSocketError _GAddress_Init_INET(GAddress *address)
1582 {
1583   address->m_len  = sizeof(struct sockaddr_in);
1584   address->m_addr = (struct sockaddr *) malloc(address->m_len);
1585   if (address->m_addr == NULL)
1586   {
1587     address->m_error = GSOCK_MEMERR;
1588     return GSOCK_MEMERR;
1589   }
1590
1591   address->m_family = GSOCK_INET;
1592   address->m_realfamily = PF_INET;
1593   ((struct sockaddr_in *)address->m_addr)->sin_family = AF_INET;
1594   ((struct sockaddr_in *)address->m_addr)->sin_addr.s_addr = INADDR_ANY;
1595
1596   return GSOCK_NOERROR;
1597 }
1598
1599 GSocketError GAddress_INET_SetHostName(GAddress *address, const char *hostname)
1600 {
1601   struct hostent *he;
1602   struct in_addr *addr;
1603
1604   assert(address != NULL);
1605
1606   CHECK_ADDRESS(address, INET);
1607
1608   addr = &(((struct sockaddr_in *)address->m_addr)->sin_addr);
1609
1610   /* If it is a numeric host name, convert it now */
1611 #if defined(HAVE_INET_ATON)
1612   if (inet_aton(hostname, addr) == 0)
1613   {
1614 #elif defined(HAVE_INET_ADDR)
1615   if ( (addr->s_addr = inet_addr(hostname)) == -1 )
1616   {
1617 #else
1618   /* Use gethostbyname by default */
1619 #ifndef __WXMAC__
1620   int val = 1;  /* VA doesn't like constants in conditional expressions */
1621   if (val)
1622 #endif
1623   {
1624 #endif
1625     struct in_addr *array_addr;
1626
1627     /* It is a real name, we solve it */
1628     if ((he = gethostbyname(hostname)) == NULL)
1629     {
1630       /* Reset to invalid address */
1631       addr->s_addr = INADDR_NONE;
1632       address->m_error = GSOCK_NOHOST;
1633       return GSOCK_NOHOST;
1634     }
1635     array_addr = (struct in_addr *) *(he->h_addr_list);
1636     addr->s_addr = array_addr[0].s_addr;
1637   }
1638   return GSOCK_NOERROR;
1639 }
1640
1641 GSocketError GAddress_INET_SetAnyAddress(GAddress *address)
1642 {
1643   return GAddress_INET_SetHostAddress(address, INADDR_ANY);
1644 }
1645
1646 GSocketError GAddress_INET_SetHostAddress(GAddress *address,
1647                                           unsigned long hostaddr)
1648 {
1649   struct in_addr *addr;
1650
1651   assert(address != NULL);
1652
1653   CHECK_ADDRESS(address, INET);
1654
1655   addr = &(((struct sockaddr_in *)address->m_addr)->sin_addr);
1656   addr->s_addr = hostaddr;
1657
1658   return GSOCK_NOERROR;
1659 }
1660
1661 GSocketError GAddress_INET_SetPortName(GAddress *address, const char *port,
1662                                        const char *protocol)
1663 {
1664   struct servent *se;
1665   struct sockaddr_in *addr;
1666
1667   assert(address != NULL);
1668   CHECK_ADDRESS(address, INET);
1669
1670   if (!port)
1671   {
1672     address->m_error = GSOCK_INVPORT;
1673     return GSOCK_INVPORT;
1674   }
1675
1676   se = getservbyname(port, protocol);
1677   if (!se)
1678   {
1679     /* the cast to int suppresses compiler warnings about subscript having the
1680        type char */
1681     if (isdigit((int)port[0]))
1682     {
1683       int port_int;
1684
1685       port_int = atoi(port);
1686       addr = (struct sockaddr_in *)address->m_addr;
1687       addr->sin_port = htons(port_int);
1688       return GSOCK_NOERROR;
1689     }
1690
1691     address->m_error = GSOCK_INVPORT;
1692     return GSOCK_INVPORT;
1693   }
1694
1695   addr = (struct sockaddr_in *)address->m_addr;
1696   addr->sin_port = se->s_port;
1697
1698   return GSOCK_NOERROR;
1699 }
1700
1701 GSocketError GAddress_INET_SetPort(GAddress *address, unsigned short port)
1702 {
1703   struct sockaddr_in *addr;
1704
1705   assert(address != NULL);
1706   CHECK_ADDRESS(address, INET);
1707
1708   addr = (struct sockaddr_in *)address->m_addr;
1709   addr->sin_port = htons(port);
1710
1711   return GSOCK_NOERROR;
1712 }
1713
1714 GSocketError GAddress_INET_GetHostName(GAddress *address, char *hostname, size_t sbuf)
1715 {
1716   struct hostent *he;
1717   char *addr_buf;
1718   struct sockaddr_in *addr;
1719
1720   assert(address != NULL);
1721   CHECK_ADDRESS(address, INET);
1722
1723   addr = (struct sockaddr_in *)address->m_addr;
1724   addr_buf = (char *)&(addr->sin_addr);
1725
1726   he = gethostbyaddr(addr_buf, sizeof(addr->sin_addr), AF_INET);
1727   if (he == NULL)
1728   {
1729     address->m_error = GSOCK_NOHOST;
1730     return GSOCK_NOHOST;
1731   }
1732
1733   strncpy(hostname, he->h_name, sbuf);
1734
1735   return GSOCK_NOERROR;
1736 }
1737
1738 unsigned long GAddress_INET_GetHostAddress(GAddress *address)
1739 {
1740   struct sockaddr_in *addr;
1741
1742   assert(address != NULL);
1743   CHECK_ADDRESS_RETVAL(address, INET, 0);
1744
1745   addr = (struct sockaddr_in *)address->m_addr;
1746
1747   return addr->sin_addr.s_addr;
1748 }
1749
1750 unsigned short GAddress_INET_GetPort(GAddress *address)
1751 {
1752   struct sockaddr_in *addr;
1753
1754   assert(address != NULL);
1755   CHECK_ADDRESS_RETVAL(address, INET, 0);
1756
1757   addr = (struct sockaddr_in *)address->m_addr;
1758   return ntohs(addr->sin_port);
1759 }
1760
1761 /*
1762  * -------------------------------------------------------------------------
1763  * Unix address family
1764  * -------------------------------------------------------------------------
1765  */
1766
1767 #ifndef __VISAGECPP__
1768 GSocketError _GAddress_Init_UNIX(GAddress *address)
1769 {
1770   address->m_len  = sizeof(struct sockaddr_un);
1771   address->m_addr = (struct sockaddr *)malloc(address->m_len);
1772   if (address->m_addr == NULL)
1773   {
1774     address->m_error = GSOCK_MEMERR;
1775     return GSOCK_MEMERR;
1776   }
1777
1778   address->m_family = GSOCK_UNIX;
1779   address->m_realfamily = PF_UNIX;
1780   ((struct sockaddr_un *)address->m_addr)->sun_family = AF_UNIX;
1781   ((struct sockaddr_un *)address->m_addr)->sun_path[0] = 0;
1782
1783   return GSOCK_NOERROR;
1784 }
1785
1786 #define UNIX_SOCK_PATHLEN (sizeof(addr->sun_path)/sizeof(addr->sun_path[0]))
1787
1788 GSocketError GAddress_UNIX_SetPath(GAddress *address, const char *path)
1789 {
1790   struct sockaddr_un *addr;
1791
1792   assert(address != NULL);
1793
1794   CHECK_ADDRESS(address, UNIX);
1795
1796   addr = ((struct sockaddr_un *)address->m_addr);
1797   strncpy(addr->sun_path, path, UNIX_SOCK_PATHLEN);
1798   addr->sun_path[UNIX_SOCK_PATHLEN - 1] = '\0';
1799
1800   return GSOCK_NOERROR;
1801 }
1802
1803 GSocketError GAddress_UNIX_GetPath(GAddress *address, char *path, size_t sbuf)
1804 {
1805   struct sockaddr_un *addr;
1806
1807   assert(address != NULL);
1808   CHECK_ADDRESS(address, UNIX);
1809
1810   addr = (struct sockaddr_un *)address->m_addr;
1811
1812   strncpy(path, addr->sun_path, sbuf);
1813
1814   return GSOCK_NOERROR;
1815 }
1816 #endif  /* !defined(__VISAGECPP__) */
1817 #endif  /* wxUSE_SOCKETS || defined(__GSOCKET_STANDALONE__) */
1818