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     close(socket->m_fd);
 265     socket->m_fd = INVALID_SOCKET;
 266 }
 267
 268 void GSocket_destroy(GSocket *socket)
 269 {
 270   assert(socket != NULL);
 271
 272   /* When using CFSocket we MUST invalidate before closing the fd */
 273 #ifdef __DARWIN__
 274   /* Per-socket GUI-specific cleanup */
 275   _GSocket_GUI_Destroy_Socket(socket);
 276 #endif
 277
 278   /* Check that the socket is really shutdowned */
 279   if (socket->m_fd != INVALID_SOCKET)
 280     GSocket_Shutdown(socket);
 281
 282 #ifndef __DARWIN__
 283   /* Per-socket GUI-specific cleanup */
 284   _GSocket_GUI_Destroy_Socket(socket);
 285 #endif
 286
 287   /* Destroy private addresses */
 288   if (socket->m_local)
 289     GAddress_destroy(socket->m_local);
 290
 291   if (socket->m_peer)
 292     GAddress_destroy(socket->m_peer);
 293
 294   /* Destroy the socket itself */
 295   free(socket);
 296 }
 297
 298 /* GSocket_Shutdown:
 299  *  Disallow further read/write operations on this socket, close
 300  *  the fd and disable all callbacks.
 301  */
 302 void GSocket_Shutdown(GSocket *socket)
 303 {
 304   int evt;
 305
 306   assert(socket != NULL);
 307
 308   /* If socket has been created, shutdown it */
 309   if (socket->m_fd != INVALID_SOCKET)
 310   {
 311     shutdown(socket->m_fd, 2);
 312     GSocket_close(socket);
 313   }
 314
 315   /* Disable GUI callbacks */
 316   for (evt = 0; evt < GSOCK_MAX_EVENT; evt++)
 317     socket->m_cbacks[evt] = NULL;
 318
 319   socket->m_detected = GSOCK_LOST_FLAG;
 320 }
 321
 322 /* Address handling */
 323
 324 /* GSocket_SetLocal:
 325  * GSocket_GetLocal:
 326  * GSocket_SetPeer:
 327  * GSocket_GetPeer:
 328  *  Set or get the local or peer address for this socket. The 'set'
 329  *  functions return GSOCK_NOERROR on success, an error code otherwise.
 330  *  The 'get' functions return a pointer to a GAddress object on success,
 331  *  or NULL otherwise, in which case they set the error code of the
 332  *  corresponding GSocket.
 333  *
 334  *  Error codes:
 335  *    GSOCK_INVSOCK - the socket is not valid.
 336  *    GSOCK_INVADDR - the address is not valid.
 337  */
 338 GSocketError GSocket_SetLocal(GSocket *socket, GAddress *address)
 339 {
 340   assert(socket != NULL);
 341
 342   /* the socket must be initialized, or it must be a server */
 343   if ((socket->m_fd != INVALID_SOCKET && !socket->m_server))
 344   {
 345     socket->m_error = GSOCK_INVSOCK;
 346     return GSOCK_INVSOCK;
 347   }
 348
 349   /* check address */
 350   if (address == NULL || address->m_family == GSOCK_NOFAMILY)
 351   {
 352     socket->m_error = GSOCK_INVADDR;
 353     return GSOCK_INVADDR;
 354   }
 355
 356   if (socket->m_local)
 357     GAddress_destroy(socket->m_local);
 358
 359   socket->m_local = GAddress_copy(address);
 360
 361   return GSOCK_NOERROR;
 362 }
 363
 364 GSocketError GSocket_SetPeer(GSocket *socket, GAddress *address)
 365 {
 366   assert(socket != NULL);
 367
 368   /* check address */
 369   if (address == NULL || address->m_family == GSOCK_NOFAMILY)
 370   {
 371     socket->m_error = GSOCK_INVADDR;
 372     return GSOCK_INVADDR;
 373   }
 374
 375   if (socket->m_peer)
 376     GAddress_destroy(socket->m_peer);
 377
 378   socket->m_peer = GAddress_copy(address);
 379
 380   return GSOCK_NOERROR;
 381 }
 382
 383 GAddress *GSocket_GetLocal(GSocket *socket)
 384 {
 385   GAddress *address;
 386   struct sockaddr addr;
 387   SOCKLEN_T size = sizeof(addr);
 388   GSocketError err;
 389
 390   assert(socket != NULL);
 391
 392   /* try to get it from the m_local var first */
 393   if (socket->m_local)
 394     return GAddress_copy(socket->m_local);
 395
 396   /* else, if the socket is initialized, try getsockname */
 397   if (socket->m_fd == INVALID_SOCKET)
 398   {
 399     socket->m_error = GSOCK_INVSOCK;
 400     return NULL;
 401   }
 402
 403   if (getsockname(socket->m_fd, &addr, (SOCKLEN_T *) &size) < 0)
 404   {
 405     socket->m_error = GSOCK_IOERR;
 406     return NULL;
 407   }
 408
 409   /* got a valid address from getsockname, create a GAddress object */
 410   address = GAddress_new();
 411   if (address == NULL)
 412   {
 413     socket->m_error = GSOCK_MEMERR;
 414     return NULL;
 415   }
 416
 417   err = _GAddress_translate_from(address, &addr, size);
 418   if (err != GSOCK_NOERROR)
 419   {
 420     GAddress_destroy(address);
 421     socket->m_error = err;
 422     return NULL;
 423   }
 424
 425   return address;
 426 }
 427
 428 GAddress *GSocket_GetPeer(GSocket *socket)
 429 {
 430   assert(socket != NULL);
 431
 432   /* try to get it from the m_peer var */
 433   if (socket->m_peer)
 434     return GAddress_copy(socket->m_peer);
 435
 436   return NULL;
 437 }
 438
 439 /* Server specific parts */
 440
 441 /* GSocket_SetServer:
 442  *  Sets up this socket as a server. The local address must have been
 443  *  set with GSocket_SetLocal() before GSocket_SetServer() is called.
 444  *  Returns GSOCK_NOERROR on success, one of the following otherwise:
 445  *
 446  *  Error codes:
 447  *    GSOCK_INVSOCK - the socket is in use.
 448  *    GSOCK_INVADDR - the local address has not been set.
 449  *    GSOCK_IOERR   - low-level error.
 450  */
 451 GSocketError GSocket_SetServer(GSocket *sck)
 452 {
 453   int arg = 1;
 454
 455   assert(sck != NULL);
 456
 457   /* must not be in use */
 458   if (sck->m_fd != INVALID_SOCKET)
 459   {
 460     sck->m_error = GSOCK_INVSOCK;
 461     return GSOCK_INVSOCK;
 462   }
 463
 464   /* the local addr must have been set */
 465   if (!sck->m_local)
 466   {
 467     sck->m_error = GSOCK_INVADDR;
 468     return GSOCK_INVADDR;
 469   }
 470
 471   /* Initialize all fields */
 472   sck->m_stream   = TRUE;
 473   sck->m_server   = TRUE;
 474   sck->m_oriented = TRUE;
 475
 476   /* Create the socket */
 477   sck->m_fd = socket(sck->m_local->m_realfamily, SOCK_STREAM, 0);
 478
 479   if (sck->m_fd == INVALID_SOCKET)
 480   {
 481     sck->m_error = GSOCK_IOERR;
 482     return GSOCK_IOERR;
 483   }
 484 #if defined(__EMX__) || defined(__VISAGECPP__)
 485   ioctl(sck->m_fd, FIONBIO, (char*)&arg, sizeof(arg));
 486 #else
 487   ioctl(sck->m_fd, FIONBIO, &arg);
 488 #endif
 489   _GSocket_Enable_Events(sck);
 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 = 0;
 918     tv.tv_usec = 0;
 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     FD_SET(socket->m_fd, &writefds);
 927     FD_SET(socket->m_fd, &exceptfds);
 928
 929     /* Check 'sticky' CONNECTION flag first */
 930     result |= (GSOCK_CONNECTION_FLAG & socket->m_detected);
 931
 932     /* If we have already detected a LOST event, then don't try
 933      * to do any further processing.
 934      */
 935     if ((socket->m_detected & GSOCK_LOST_FLAG) != 0)
 936     {
 937       socket->m_establishing = FALSE;
 938
 939       return (GSOCK_LOST_FLAG & flags);
 940     }
 941
 942     /* Try select now */
 943     if (select(socket->m_fd + 1, &readfds, &writefds, &exceptfds, &tv) <= 0)
 944     {
 945       /* What to do here? */
 946       return (result & flags);
 947     }
 948
 949     /* Check for readability */
 950     if (FD_ISSET(socket->m_fd, &readfds))
 951     {
 952       char c;
 953
 954       if (recv(socket->m_fd, &c, 1, MSG_PEEK) > 0)
 955       {
 956         result |= GSOCK_INPUT_FLAG;
 957       }
 958       else
 959       {
 960         if (socket->m_server && socket->m_stream)
 961         {
 962           result |= GSOCK_CONNECTION_FLAG;
 963           socket->m_detected |= GSOCK_CONNECTION_FLAG;
 964         }
 965         else
 966         {
 967           socket->m_detected = GSOCK_LOST_FLAG;
 968           socket->m_establishing = FALSE;
 969
 970           /* LOST event: Abort any further processing */
 971           return (GSOCK_LOST_FLAG & flags);
 972         }
 973       }
 974     }
 975
 976     /* Check for writability */
 977     if (FD_ISSET(socket->m_fd, &writefds))
 978     {
 979       if (socket->m_establishing && !socket->m_server)
 980       {
 981         int error;
 982         SOCKLEN_T len = sizeof(error);
 983
 984         socket->m_establishing = FALSE;
 985
 986         getsockopt(socket->m_fd, SOL_SOCKET, SO_ERROR, (void*)&error, &len);
 987
 988         if (error)
 989         {
 990           socket->m_detected = GSOCK_LOST_FLAG;
 991
 992           /* LOST event: Abort any further processing */
 993           return (GSOCK_LOST_FLAG & flags);
 994         }
 995         else
 996         {
 997           result |= GSOCK_CONNECTION_FLAG;
 998           socket->m_detected |= GSOCK_CONNECTION_FLAG;
 999         }
1000       }
1001       else
1002       {
1003         result |= GSOCK_OUTPUT_FLAG;
1004       }
1005     }
1006
1007     /* Check for exceptions and errors (is this useful in Unices?) */
1008     if (FD_ISSET(socket->m_fd, &exceptfds))
1009     {
1010       socket->m_establishing = FALSE;
1011       socket->m_detected = GSOCK_LOST_FLAG;
1012
1013       /* LOST event: Abort any further processing */
1014       return (GSOCK_LOST_FLAG & flags);
1015     }
1016
1017     return (result & flags);
1018
1019   }
1020   else
1021   {
1022
1023     assert(socket != NULL);
1024     return flags & socket->m_detected;
1025
1026   }
1027 }
1028
1029 /* Flags */
1030
1031 /* GSocket_SetNonBlocking:
1032  *  Sets the socket to non-blocking mode. All IO calls will return
1033  *  immediately.
1034  */
1035 void GSocket_SetNonBlocking(GSocket *socket, int non_block)
1036 {
1037   assert(socket != NULL);
1038
1039   GSocket_Debug( ("GSocket_SetNonBlocking: %d\n", (int)non_block) );
1040
1041   socket->m_non_blocking = non_block;
1042 }
1043
1044 /* GSocket_SetTimeout:
1045  *  Sets the timeout for blocking calls. Time is expressed in
1046  *  milliseconds.
1047  */
1048 void GSocket_SetTimeout(GSocket *socket, unsigned long millisec)
1049 {
1050   assert(socket != NULL);
1051
1052   socket->m_timeout = millisec;
1053 }
1054
1055 /* GSocket_GetError:
1056  *  Returns the last error occured for this socket. Note that successful
1057  *  operations do not clear this back to GSOCK_NOERROR, so use it only
1058  *  after an error.
1059  */
1060 GSocketError GSocket_GetError(GSocket *socket)
1061 {
1062   assert(socket != NULL);
1063
1064   return socket->m_error;
1065 }
1066
1067 /* Callbacks */
1068
1069 /* GSOCK_INPUT:
1070  *   There is data to be read in the input buffer. If, after a read
1071  *   operation, there is still data available, the callback function will
1072  *   be called again.
1073  * GSOCK_OUTPUT:
1074  *   The socket is available for writing. That is, the next write call
1075  *   won't block. This event is generated only once, when the connection is
1076  *   first established, and then only if a call failed with GSOCK_WOULDBLOCK,
1077  *   when the output buffer empties again. This means that the app should
1078  *   assume that it can write since the first OUTPUT event, and no more
1079  *   OUTPUT events will be generated unless an error occurs.
1080  * GSOCK_CONNECTION:
1081  *   Connection succesfully established, for client sockets, or incoming
1082  *   client connection, for server sockets. Wait for this event (also watch
1083  *   out for GSOCK_LOST) after you issue a nonblocking GSocket_Connect() call.
1084  * GSOCK_LOST:
1085  *   The connection is lost (or a connection request failed); this could
1086  *   be due to a failure, or due to the peer closing it gracefully.
1087  */
1088
1089 /* GSocket_SetCallback:
1090  *  Enables the callbacks specified by 'flags'. Note that 'flags'
1091  *  may be a combination of flags OR'ed toghether, so the same
1092  *  callback function can be made to accept different events.
1093  *  The callback function must have the following prototype:
1094  *
1095  *  void function(GSocket *socket, GSocketEvent event, char *cdata)
1096  */
1097 void GSocket_SetCallback(GSocket *socket, GSocketEventFlags flags,
1098                          GSocketCallback callback, char *cdata)
1099 {
1100   int count;
1101
1102   assert(socket != NULL);
1103
1104   for (count = 0; count < GSOCK_MAX_EVENT; count++)
1105   {
1106     if ((flags & (1 << count)) != 0)
1107     {
1108       socket->m_cbacks[count] = callback;
1109       socket->m_data[count] = cdata;
1110     }
1111   }
1112 }
1113
1114 /* GSocket_UnsetCallback:
1115  *  Disables all callbacks specified by 'flags', which may be a
1116  *  combination of flags OR'ed toghether.
1117  */
1118 void GSocket_UnsetCallback(GSocket *socket, GSocketEventFlags flags)
1119 {
1120   int count;
1121
1122   assert(socket != NULL);
1123
1124   for (count = 0; count < GSOCK_MAX_EVENT; count++)
1125   {
1126     if ((flags & (1 << count)) != 0)
1127     {
1128       socket->m_cbacks[count] = NULL;
1129       socket->m_data[count] = NULL;
1130     }
1131   }
1132 }
1133
1134
1135 #define CALL_CALLBACK(socket, event) {                                  \
1136   _GSocket_Disable(socket, event);                                      \
1137   if (socket->m_cbacks[event])                                          \
1138     socket->m_cbacks[event](socket, event, socket->m_data[event]);      \
1139 }
1140
1141
1142 void _GSocket_Enable(GSocket *socket, GSocketEvent event)
1143 {
1144   socket->m_detected &= ~(1 << event);
1145   _GSocket_Install_Callback(socket, event);
1146 }
1147
1148 void _GSocket_Disable(GSocket *socket, GSocketEvent event)
1149 {
1150   socket->m_detected |= (1 << event);
1151   _GSocket_Uninstall_Callback(socket, event);
1152 }
1153
1154 /* _GSocket_Input_Timeout:
1155  *  For blocking sockets, wait until data is available or
1156  *  until timeout ellapses.
1157  */
1158 GSocketError _GSocket_Input_Timeout(GSocket *socket)
1159 {
1160   struct timeval tv;
1161   fd_set readfds;
1162   int ret;
1163
1164   /* Linux select() will overwrite the struct on return */
1165   tv.tv_sec  = (socket->m_timeout / 1000);
1166   tv.tv_usec = (socket->m_timeout % 1000) * 1000;
1167
1168   if (!socket->m_non_blocking)
1169   {
1170     FD_ZERO(&readfds);
1171     FD_SET(socket->m_fd, &readfds);
1172     ret = select(socket->m_fd + 1, &readfds, NULL, NULL, &tv);
1173     if (ret == 0)
1174     {
1175       GSocket_Debug(( "GSocket_Input_Timeout, select returned 0\n" ));
1176       socket->m_error = GSOCK_TIMEDOUT;
1177       return GSOCK_TIMEDOUT;
1178     }
1179     if (ret == -1)
1180     {
1181       GSocket_Debug(( "GSocket_Input_Timeout, select returned -1\n" ));
1182       if (errno == EBADF) { GSocket_Debug(( "Invalid file descriptor\n" )); }
1183       if (errno == EINTR) { GSocket_Debug(( "A non blocked signal was caught\n" )); }
1184       if (errno == EINVAL) { GSocket_Debug(( "The highest number descriptor is negative\n" )); }
1185       if (errno == ENOMEM) { GSocket_Debug(( "Not enough memory\n" )); }
1186       socket->m_error = GSOCK_TIMEDOUT;
1187       return GSOCK_TIMEDOUT;
1188     }
1189   }
1190   return GSOCK_NOERROR;
1191 }
1192
1193 /* _GSocket_Output_Timeout:
1194  *  For blocking sockets, wait until data can be sent without
1195  *  blocking or until timeout ellapses.
1196  */
1197 GSocketError _GSocket_Output_Timeout(GSocket *socket)
1198 {
1199   struct timeval tv;
1200   fd_set writefds;
1201   int ret;
1202
1203   /* Linux select() will overwrite the struct on return */
1204   tv.tv_sec  = (socket->m_timeout / 1000);
1205   tv.tv_usec = (socket->m_timeout % 1000) * 1000;
1206
1207   GSocket_Debug( ("m_non_blocking has: %d\n", (int)socket->m_non_blocking) );
1208
1209   if (!socket->m_non_blocking)
1210   {
1211     FD_ZERO(&writefds);
1212     FD_SET(socket->m_fd, &writefds);
1213     ret = select(socket->m_fd + 1, NULL, &writefds, NULL, &tv);
1214     if (ret == 0)
1215     {
1216       GSocket_Debug(( "GSocket_Output_Timeout, select returned 0\n" ));
1217       socket->m_error = GSOCK_TIMEDOUT;
1218       return GSOCK_TIMEDOUT;
1219     }
1220     if (ret == -1)
1221     {
1222       GSocket_Debug(( "GSocket_Output_Timeout, select returned -1\n" ));
1223       if (errno == EBADF) { GSocket_Debug(( "Invalid file descriptor\n" )); }
1224       if (errno == EINTR) { GSocket_Debug(( "A non blocked signal was caught\n" )); }
1225       if (errno == EINVAL) { GSocket_Debug(( "The highest number descriptor is negative\n" )); }
1226       if (errno == ENOMEM) { GSocket_Debug(( "Not enough memory\n" )); }
1227       socket->m_error = GSOCK_TIMEDOUT;
1228       return GSOCK_TIMEDOUT;
1229     }
1230     if ( ! FD_ISSET(socket->m_fd, &writefds) ) {
1231         GSocket_Debug(( "GSocket_Output_Timeout is buggy!\n" ));
1232     }
1233     else {
1234         GSocket_Debug(( "GSocket_Output_Timeout seems correct\n" ));
1235     }
1236   }
1237   else
1238   {
1239     GSocket_Debug(( "GSocket_Output_Timeout, didn't try select!\n" ));
1240   }
1241
1242   return GSOCK_NOERROR;
1243 }
1244
1245 int _GSocket_Recv_Stream(GSocket *socket, char *buffer, int size)
1246 {
1247   return recv(socket->m_fd, buffer, size, 0);
1248 }
1249
1250 int _GSocket_Recv_Dgram(GSocket *socket, char *buffer, int size)
1251 {
1252   struct sockaddr from;
1253   SOCKLEN_T fromlen = sizeof(from);
1254   int ret;
1255   GSocketError err;
1256
1257   fromlen = sizeof(from);
1258
1259   ret = recvfrom(socket->m_fd, buffer, size, 0, &from, (SOCKLEN_T *) &fromlen);
1260
1261   if (ret == -1)
1262     return -1;
1263
1264   /* Translate a system address into a GSocket address */
1265   if (!socket->m_peer)
1266   {
1267     socket->m_peer = GAddress_new();
1268     if (!socket->m_peer)
1269     {
1270       socket->m_error = GSOCK_MEMERR;
1271       return -1;
1272     }
1273   }
1274   err = _GAddress_translate_from(socket->m_peer, &from, fromlen);
1275   if (err != GSOCK_NOERROR)
1276   {
1277     GAddress_destroy(socket->m_peer);
1278     socket->m_peer  = NULL;
1279     socket->m_error = err;
1280     return -1;
1281   }
1282
1283   return ret;
1284 }
1285
1286 int _GSocket_Send_Stream(GSocket *socket, const char *buffer, int size)
1287 {
1288   int ret;
1289
1290 #ifndef __VISAGECPP__
1291   MASK_SIGNAL();
1292   ret = send(socket->m_fd, buffer, size, 0);
1293   UNMASK_SIGNAL();
1294 #else
1295   ret = send(socket->m_fd, (char *)buffer, size, 0);
1296 #endif
1297
1298   return ret;
1299 }
1300
1301 int _GSocket_Send_Dgram(GSocket *socket, const char *buffer, int size)
1302 {
1303   struct sockaddr *addr;
1304   int len, ret;
1305   GSocketError err;
1306
1307   if (!socket->m_peer)
1308   {
1309     socket->m_error = GSOCK_INVADDR;
1310     return -1;
1311   }
1312
1313   err = _GAddress_translate_to(socket->m_peer, &addr, &len);
1314   if (err != GSOCK_NOERROR)
1315   {
1316     socket->m_error = err;
1317     return -1;
1318   }
1319
1320 #ifndef __VISAGECPP__
1321   MASK_SIGNAL();
1322   ret = sendto(socket->m_fd, buffer, size, 0, addr, len);
1323   UNMASK_SIGNAL();
1324 #else
1325   ret = sendto(socket->m_fd, (char *)buffer, size, 0, addr, len);
1326 #endif
1327
1328   /* Frees memory allocated from _GAddress_translate_to */
1329   free(addr);
1330
1331   return ret;
1332 }
1333
1334 void _GSocket_Detected_Read(GSocket *socket)
1335 {
1336   char c;
1337
1338   /* If we have already detected a LOST event, then don't try
1339    * to do any further processing.
1340    */
1341   if ((socket->m_detected & GSOCK_LOST_FLAG) != 0)
1342   {
1343     socket->m_establishing = FALSE;
1344
1345     CALL_CALLBACK(socket, GSOCK_LOST);
1346     GSocket_Shutdown(socket);
1347     return;
1348   }
1349
1350   if (recv(socket->m_fd, &c, 1, MSG_PEEK) > 0)
1351   {
1352     CALL_CALLBACK(socket, GSOCK_INPUT);
1353   }
1354   else
1355   {
1356     if (socket->m_server && socket->m_stream)
1357     {
1358       CALL_CALLBACK(socket, GSOCK_CONNECTION);
1359     }
1360     else
1361     {
1362       CALL_CALLBACK(socket, GSOCK_LOST);
1363       GSocket_Shutdown(socket);
1364     }
1365   }
1366 }
1367
1368 void _GSocket_Detected_Write(GSocket *socket)
1369 {
1370   /* If we have already detected a LOST event, then don't try
1371    * to do any further processing.
1372    */
1373   if ((socket->m_detected & GSOCK_LOST_FLAG) != 0)
1374   {
1375     socket->m_establishing = FALSE;
1376
1377     CALL_CALLBACK(socket, GSOCK_LOST);
1378     GSocket_Shutdown(socket);
1379     return;
1380   }
1381
1382   if (socket->m_establishing && !socket->m_server)
1383   {
1384     int error;
1385     SOCKLEN_T len = sizeof(error);
1386
1387     socket->m_establishing = FALSE;
1388
1389     getsockopt(socket->m_fd, SOL_SOCKET, SO_ERROR, (void*)&error, &len);
1390
1391     if (error)
1392     {
1393       CALL_CALLBACK(socket, GSOCK_LOST);
1394       GSocket_Shutdown(socket);
1395     }
1396     else
1397     {
1398       CALL_CALLBACK(socket, GSOCK_CONNECTION);
1399       /* We have to fire this event by hand because CONNECTION (for clients)
1400        * and OUTPUT are internally the same and we just disabled CONNECTION
1401        * events with the above macro.
1402        */
1403       CALL_CALLBACK(socket, GSOCK_OUTPUT);
1404     }
1405   }
1406   else
1407   {
1408     CALL_CALLBACK(socket, GSOCK_OUTPUT);
1409   }
1410 }
1411
1412 /*
1413  * -------------------------------------------------------------------------
1414  * GAddress
1415  * -------------------------------------------------------------------------
1416  */
1417
1418 /* CHECK_ADDRESS verifies that the current address family is either
1419  * GSOCK_NOFAMILY or GSOCK_*family*, and if it is GSOCK_NOFAMILY, it
1420  * initalizes it to be a GSOCK_*family*. In other cases, it returns
1421  * an appropiate error code.
1422  *
1423  * CHECK_ADDRESS_RETVAL does the same but returning 'retval' on error.
1424  */
1425 #define CHECK_ADDRESS(address, family)                              \
1426 {                                                                   \
1427   if (address->m_family == GSOCK_NOFAMILY)                          \
1428     if (_GAddress_Init_##family(address) != GSOCK_NOERROR)          \
1429       return address->m_error;                                      \
1430   if (address->m_family != GSOCK_##family)                          \
1431   {                                                                 \
1432     address->m_error = GSOCK_INVADDR;                               \
1433     return GSOCK_INVADDR;                                           \
1434   }                                                                 \
1435 }
1436
1437 #define CHECK_ADDRESS_RETVAL(address, family, retval)               \
1438 {                                                                   \
1439   if (address->m_family == GSOCK_NOFAMILY)                          \
1440     if (_GAddress_Init_##family(address) != GSOCK_NOERROR)          \
1441       return retval;                                                \
1442   if (address->m_family != GSOCK_##family)                          \
1443   {                                                                 \
1444     address->m_error = GSOCK_INVADDR;                               \
1445     return retval;                                                  \
1446   }                                                                 \
1447 }
1448
1449
1450 GAddress *GAddress_new(void)
1451 {
1452   GAddress *address;
1453
1454   if ((address = (GAddress *) malloc(sizeof(GAddress))) == NULL)
1455     return NULL;
1456
1457   address->m_family  = GSOCK_NOFAMILY;
1458   address->m_addr    = NULL;
1459   address->m_len     = 0;
1460
1461   return address;
1462 }
1463
1464 GAddress *GAddress_copy(GAddress *address)
1465 {
1466   GAddress *addr2;
1467
1468   assert(address != NULL);
1469
1470   if ((addr2 = (GAddress *) malloc(sizeof(GAddress))) == NULL)
1471     return NULL;
1472
1473   memcpy(addr2, address, sizeof(GAddress));
1474
1475   if (address->m_addr && address->m_len > 0)
1476   {
1477     addr2->m_addr = (struct sockaddr *)malloc(addr2->m_len);
1478     if (addr2->m_addr == NULL)
1479     {
1480       free(addr2);
1481       return NULL;
1482     }
1483     memcpy(addr2->m_addr, address->m_addr, addr2->m_len);
1484   }
1485
1486   return addr2;
1487 }
1488
1489 void GAddress_destroy(GAddress *address)
1490 {
1491   assert(address != NULL);
1492
1493   if (address->m_addr)
1494     free(address->m_addr);
1495
1496   free(address);
1497 }
1498
1499 void GAddress_SetFamily(GAddress *address, GAddressType type)
1500 {
1501   assert(address != NULL);
1502
1503   address->m_family = type;
1504 }
1505
1506 GAddressType GAddress_GetFamily(GAddress *address)
1507 {
1508   assert(address != NULL);
1509
1510   return address->m_family;
1511 }
1512
1513 GSocketError _GAddress_translate_from(GAddress *address,
1514                                       struct sockaddr *addr, int len)
1515 {
1516   address->m_realfamily = addr->sa_family;
1517   switch (addr->sa_family)
1518   {
1519     case AF_INET:
1520       address->m_family = GSOCK_INET;
1521       break;
1522     case AF_UNIX:
1523       address->m_family = GSOCK_UNIX;
1524       break;
1525 #ifdef AF_INET6
1526     case AF_INET6:
1527       address->m_family = GSOCK_INET6;
1528       break;
1529 #endif
1530     default:
1531     {
1532       address->m_error = GSOCK_INVOP;
1533       return GSOCK_INVOP;
1534     }
1535   }
1536
1537   if (address->m_addr)
1538     free(address->m_addr);
1539
1540   address->m_len  = len;
1541   address->m_addr = (struct sockaddr *)malloc(len);
1542
1543   if (address->m_addr == NULL)
1544   {
1545     address->m_error = GSOCK_MEMERR;
1546     return GSOCK_MEMERR;
1547   }
1548   memcpy(address->m_addr, addr, len);
1549
1550   return GSOCK_NOERROR;
1551 }
1552
1553 GSocketError _GAddress_translate_to(GAddress *address,
1554                                     struct sockaddr **addr, int *len)
1555 {
1556   if (!address->m_addr)
1557   {
1558     address->m_error = GSOCK_INVADDR;
1559     return GSOCK_INVADDR;
1560   }
1561
1562   *len = address->m_len;
1563   *addr = (struct sockaddr *)malloc(address->m_len);
1564   if (*addr == NULL)
1565   {
1566     address->m_error = GSOCK_MEMERR;
1567     return GSOCK_MEMERR;
1568   }
1569
1570   memcpy(*addr, address->m_addr, address->m_len);
1571   return GSOCK_NOERROR;
1572 }
1573
1574 /*
1575  * -------------------------------------------------------------------------
1576  * Internet address family
1577  * -------------------------------------------------------------------------
1578  */
1579
1580 GSocketError _GAddress_Init_INET(GAddress *address)
1581 {
1582   address->m_len  = sizeof(struct sockaddr_in);
1583   address->m_addr = (struct sockaddr *) malloc(address->m_len);
1584   if (address->m_addr == NULL)
1585   {
1586     address->m_error = GSOCK_MEMERR;
1587     return GSOCK_MEMERR;
1588   }
1589
1590   address->m_family = GSOCK_INET;
1591   address->m_realfamily = PF_INET;
1592   ((struct sockaddr_in *)address->m_addr)->sin_family = AF_INET;
1593   ((struct sockaddr_in *)address->m_addr)->sin_addr.s_addr = INADDR_ANY;
1594
1595   return GSOCK_NOERROR;
1596 }
1597
1598 GSocketError GAddress_INET_SetHostName(GAddress *address, const char *hostname)
1599 {
1600   struct hostent *he;
1601   struct in_addr *addr;
1602
1603   assert(address != NULL);
1604
1605   CHECK_ADDRESS(address, INET);
1606
1607   addr = &(((struct sockaddr_in *)address->m_addr)->sin_addr);
1608
1609   /* If it is a numeric host name, convert it now */
1610 #if defined(HAVE_INET_ATON)
1611   if (inet_aton(hostname, addr) == 0)
1612   {
1613 #elif defined(HAVE_INET_ADDR)
1614   if ( (addr->s_addr = inet_addr(hostname)) == -1 )
1615   {
1616 #else
1617   /* Use gethostbyname by default */
1618   int val = 1;  //VA doesn't like constants in conditional expressions at all
1619   if (val)
1620   {
1621 #endif
1622     struct in_addr *array_addr;
1623
1624     /* It is a real name, we solve it */
1625     if ((he = gethostbyname(hostname)) == NULL)
1626     {
1627       /* Reset to invalid address */
1628       addr->s_addr = INADDR_NONE;
1629       address->m_error = GSOCK_NOHOST;
1630       return GSOCK_NOHOST;
1631     }
1632     array_addr = (struct in_addr *) *(he->h_addr_list);
1633     addr->s_addr = array_addr[0].s_addr;
1634   }
1635   return GSOCK_NOERROR;
1636 }
1637
1638 GSocketError GAddress_INET_SetAnyAddress(GAddress *address)
1639 {
1640   return GAddress_INET_SetHostAddress(address, INADDR_ANY);
1641 }
1642
1643 GSocketError GAddress_INET_SetHostAddress(GAddress *address,
1644                                           unsigned long hostaddr)
1645 {
1646   struct in_addr *addr;
1647
1648   assert(address != NULL);
1649
1650   CHECK_ADDRESS(address, INET);
1651
1652   addr = &(((struct sockaddr_in *)address->m_addr)->sin_addr);
1653   addr->s_addr = hostaddr;
1654
1655   return GSOCK_NOERROR;
1656 }
1657
1658 GSocketError GAddress_INET_SetPortName(GAddress *address, const char *port,
1659                                        const char *protocol)
1660 {
1661   struct servent *se;
1662   struct sockaddr_in *addr;
1663
1664   assert(address != NULL);
1665   CHECK_ADDRESS(address, INET);
1666
1667   if (!port)
1668   {
1669     address->m_error = GSOCK_INVPORT;
1670     return GSOCK_INVPORT;
1671   }
1672
1673   se = getservbyname(port, protocol);
1674   if (!se)
1675   {
1676     /* the cast to int suppresses compiler warnings about subscript having the
1677        type char */
1678     if (isdigit((int)port[0]))
1679     {
1680       int port_int;
1681
1682       port_int = atoi(port);
1683       addr = (struct sockaddr_in *)address->m_addr;
1684       addr->sin_port = htons(port_int);
1685       return GSOCK_NOERROR;
1686     }
1687
1688     address->m_error = GSOCK_INVPORT;
1689     return GSOCK_INVPORT;
1690   }
1691
1692   addr = (struct sockaddr_in *)address->m_addr;
1693   addr->sin_port = se->s_port;
1694
1695   return GSOCK_NOERROR;
1696 }
1697
1698 GSocketError GAddress_INET_SetPort(GAddress *address, unsigned short port)
1699 {
1700   struct sockaddr_in *addr;
1701
1702   assert(address != NULL);
1703   CHECK_ADDRESS(address, INET);
1704
1705   addr = (struct sockaddr_in *)address->m_addr;
1706   addr->sin_port = htons(port);
1707
1708   return GSOCK_NOERROR;
1709 }
1710
1711 GSocketError GAddress_INET_GetHostName(GAddress *address, char *hostname, size_t sbuf)
1712 {
1713   struct hostent *he;
1714   char *addr_buf;
1715   struct sockaddr_in *addr;
1716
1717   assert(address != NULL);
1718   CHECK_ADDRESS(address, INET);
1719
1720   addr = (struct sockaddr_in *)address->m_addr;
1721   addr_buf = (char *)&(addr->sin_addr);
1722
1723   he = gethostbyaddr(addr_buf, sizeof(addr->sin_addr), AF_INET);
1724   if (he == NULL)
1725   {
1726     address->m_error = GSOCK_NOHOST;
1727     return GSOCK_NOHOST;
1728   }
1729
1730   strncpy(hostname, he->h_name, sbuf);
1731
1732   return GSOCK_NOERROR;
1733 }
1734
1735 unsigned long GAddress_INET_GetHostAddress(GAddress *address)
1736 {
1737   struct sockaddr_in *addr;
1738
1739   assert(address != NULL);
1740   CHECK_ADDRESS_RETVAL(address, INET, 0);
1741
1742   addr = (struct sockaddr_in *)address->m_addr;
1743
1744   return addr->sin_addr.s_addr;
1745 }
1746
1747 unsigned short GAddress_INET_GetPort(GAddress *address)
1748 {
1749   struct sockaddr_in *addr;
1750
1751   assert(address != NULL);
1752   CHECK_ADDRESS_RETVAL(address, INET, 0);
1753
1754   addr = (struct sockaddr_in *)address->m_addr;
1755   return ntohs(addr->sin_port);
1756 }
1757
1758 /*
1759  * -------------------------------------------------------------------------
1760  * Unix address family
1761  * -------------------------------------------------------------------------
1762  */
1763
1764 #ifndef __VISAGECPP__
1765 GSocketError _GAddress_Init_UNIX(GAddress *address)
1766 {
1767   address->m_len  = sizeof(struct sockaddr_un);
1768   address->m_addr = (struct sockaddr *)malloc(address->m_len);
1769   if (address->m_addr == NULL)
1770   {
1771     address->m_error = GSOCK_MEMERR;
1772     return GSOCK_MEMERR;
1773   }
1774
1775   address->m_family = GSOCK_UNIX;
1776   address->m_realfamily = PF_UNIX;
1777   ((struct sockaddr_un *)address->m_addr)->sun_family = AF_UNIX;
1778   ((struct sockaddr_un *)address->m_addr)->sun_path[0] = 0;
1779
1780   return GSOCK_NOERROR;
1781 }
1782
1783 #define UNIX_SOCK_PATHLEN (sizeof(addr->sun_path)/sizeof(addr->sun_path[0]))
1784
1785 GSocketError GAddress_UNIX_SetPath(GAddress *address, const char *path)
1786 {
1787   struct sockaddr_un *addr;
1788
1789   assert(address != NULL);
1790
1791   CHECK_ADDRESS(address, UNIX);
1792
1793   addr = ((struct sockaddr_un *)address->m_addr);
1794   strncpy(addr->sun_path, path, UNIX_SOCK_PATHLEN);
1795   addr->sun_path[UNIX_SOCK_PATHLEN - 1] = '\0';
1796
1797   return GSOCK_NOERROR;
1798 }
1799
1800 GSocketError GAddress_UNIX_GetPath(GAddress *address, char *path, size_t sbuf)
1801 {
1802   struct sockaddr_un *addr;
1803
1804   assert(address != NULL);
1805   CHECK_ADDRESS(address, UNIX);
1806
1807   addr = (struct sockaddr_un *)address->m_addr;
1808
1809   strncpy(path, addr->sun_path, sbuf);
1810
1811   return GSOCK_NOERROR;
1812 }
1813 #endif  /* !defined(__VISAGECPP__) */
1814 #endif  /* wxUSE_SOCKETS || defined(__GSOCKET_STANDALONE__) */
1815