src/os2/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-style 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 #ifndef __EMX__
  21 /* I don't see, why this include is needed, but it seems to be necessary
  22    sometimes. For EMX, including C++ headers into plain C source breaks
  23    compilation, so don't do it there.                                   */
  24 #include "wx/defs.h"
  25 #endif
  26
  27 #if wxUSE_SOCKETS || defined(__GSOCKET_STANDALONE__)
  28
  29 #define BSD_SELECT /* use Berkley Sockets select */
  30
  31 #include <assert.h>
  32 #include <sys/types.h>
  33
  34 #ifdef __EMX__
  35 #include <sys/time.h>
  36 #include <netinet/in.h>
  37 #include <arpa/inet.h>
  38 #include <netdb.h>
  39 #include <errno.h>
  40 #include <unistd.h>
  41 #include <sys/un.h>
  42 #define HAVE_INET_ADDR
  43
  44 #else
  45
  46 #include <string.h>
  47
  48 #include <sys/time.h>
  49 #include <types.h>
  50 #include <netinet/in.h>
  51 #include <netdb.h>
  52 #include <nerrno.h>
  53
  54 #endif
  55
  56 #if defined(__VISAGECPP__) && __IBMCPP__ < 400
  57
  58 #include <machine/endian.h>
  59 #include <socket.h>
  60 #include <ioctl.h>
  61 #include <select.h>
  62 #include <unistd.h>
  63
  64 #define EBADF   SOCEBADF
  65
  66 #else
  67
  68 #include <sys/socket.h>
  69 #include <sys/ioctl.h>
  70 #include <sys/select.h>
  71
  72 #ifdef __EMX__
  73 #define soclose(a) close(a)
  74 #else
  75 #define select(a,b,c,d,e) bsdselect(a,b,c,d,e)
  76 int _System bsdselect(int,
  77                       struct fd_set *,
  78                       struct fd_set *,
  79                       struct fd_set *,
  80                       struct timeval *);
  81 int _System soclose(int);
  82 #endif
  83 #endif
  84
  85 #include <stdio.h>
  86 #if (defined(__VISAGECPP__) && __IBMCPP__ < 400) || defined(__EMX__)
  87 #  ifdef min
  88 #  undef min
  89 #  endif
  90 #  include <stdlib.h>
  91 #endif
  92 #include <stddef.h>
  93 #include <ctype.h>
  94 #include <stdlib.h>
  95
  96 #include <signal.h>
  97
  98 #ifndef SOCKLEN_T
  99
 100 #ifdef __GLIBC__
 101 #      if __GLIBC__ == 2
 102 #         define SOCKLEN_T socklen_t
 103 #      endif
 104 #else
 105 #      define SOCKLEN_T int
 106 #endif
 107
 108 #endif
 109
 110 /*
 111  * MSW defines this, Unices don't.
 112  */
 113 #ifndef INVALID_SOCKET
 114 #define INVALID_SOCKET -1
 115 #endif
 116
 117 /*
 118  * INADDR_BROADCAST is identical to INADDR_NONE which is not defined
 119  * on all systems. INADDR_BROADCAST should be fine to indicate an error.
 120  */
 121 #ifndef INADDR_NONE
 122 #define INADDR_NONE INADDR_BROADCAST
 123 #endif
 124
 125 #define MASK_SIGNAL()                       \
 126 {                                           \
 127   void (*old_handler)(int);                 \
 128                                             \
 129   old_handler = signal(SIGPIPE, SIG_IGN);
 130
 131 #define UNMASK_SIGNAL()                     \
 132   signal(SIGPIPE, old_handler);             \
 133 }
 134
 135
 136 #ifndef __GSOCKET_STANDALONE__
 137 #  include "wx/unix/gsockunx.h"
 138 #  include "wx/gsocket.h"
 139 #else
 140 #  include "gsockunx.h"
 141 #  include "gsocket.h"
 142 #endif /* __GSOCKET_STANDALONE__ */
 143
 144 /* debugging helpers */
 145 #ifdef __GSOCKET_DEBUG__
 146 #  define GSocket_Debug(args) printf args
 147 #else
 148 #  define GSocket_Debug(args)
 149 #endif /* __GSOCKET_DEBUG__ */
 150
 151 /* Table of GUI-related functions. We must call them indirectly because
 152  * of wxBase and GUI separation: */
 153
 154 static struct GSocketGUIFunctionsTable *gs_gui_functions;
 155
 156 #define USE_GUI() (gs_gui_functions != NULL)
 157
 158 /* Define macros to simplify indirection: */
 159 #define _GSocket_GUI_Init() \
 160     if (gs_gui_functions) gs_gui_functions->GUI_Init()
 161 #define _GSocket_GUI_Cleanup() \
 162     if (gs_gui_functions) gs_gui_functions->GUI_Cleanup()
 163 #define _GSocket_GUI_Init_Socket(socket) \
 164     (gs_gui_functions ? gs_gui_functions->GUI_Init_Socket(socket) : 1)
 165 #define _GSocket_GUI_Destroy_Socket(socket) \
 166     if (gs_gui_functions) gs_gui_functions->GUI_Destroy_Socket(socket)
 167 #define _GSocket_Enable_Events(socket) \
 168     if (gs_gui_functions) gs_gui_functions->Enable_Events(socket)
 169 #define _GSocket_Disable_Events(socket) \
 170     if (gs_gui_functions) gs_gui_functions->Disable_Events(socket)
 171 #define _GSocket_Install_Callback(socket, event) \
 172     if (gs_gui_functions) gs_gui_functions->Install_Callback(socket, event)
 173 #define _GSocket_Uninstall_Callback(socket, event) \
 174     if (gs_gui_functions) gs_gui_functions->Uninstall_Callback(socket, event)
 175
 176 static struct GSocketBaseFunctionsTable gs_base_functions =
 177 {
 178     _GSocket_Detected_Read,
 179     _GSocket_Detected_Write
 180 };
 181
 182 /* Global initialisers */
 183
 184 void GSocket_SetGUIFunctions(struct GSocketGUIFunctionsTable *guifunc)
 185 {
 186   gs_gui_functions = guifunc;
 187 }
 188
 189 int GSocket_Init(void)
 190 {
 191   if (gs_gui_functions)
 192   {
 193       if ( !gs_gui_functions->GUI_Init() )
 194         return 0;
 195   }
 196   return 1;
 197 }
 198
 199 void GSocket_Cleanup(void)
 200 {
 201   if (gs_gui_functions)
 202   {
 203       gs_gui_functions->GUI_Cleanup();
 204   }
 205 }
 206
 207 /* Constructors / Destructors for GSocket */
 208
 209 GSocket *GSocket_new(void)
 210 {
 211   int i, success;
 212   GSocket *socket;
 213
 214   socket = (GSocket *)malloc(sizeof(GSocket));
 215
 216   if (socket == NULL)
 217     return NULL;
 218
 219   socket->m_fd                  = INVALID_SOCKET;
 220   for (i=0;i<GSOCK_MAX_EVENT;i++)
 221   {
 222     socket->m_cbacks[i]         = NULL;
 223   }
 224   socket->m_detected            = 0;
 225   socket->m_local               = NULL;
 226   socket->m_peer                = NULL;
 227   socket->m_error               = GSOCK_NOERROR;
 228   socket->m_server              = FALSE;
 229   socket->m_stream              = TRUE;
 230   socket->m_gui_dependent       = NULL;
 231   socket->m_non_blocking        = FALSE;
 232   socket->m_timeout             = 10*60*1000;
 233                                 /* 10 minutes * 60 sec * 1000 millisec */
 234   socket->m_establishing        = FALSE;
 235
 236   socket->m_functions           = &gs_base_functions;
 237
 238   /* Per-socket GUI-specific initialization */
 239   success = _GSocket_GUI_Init_Socket(socket);
 240   if (!success)
 241   {
 242     free(socket);
 243     return NULL;
 244   }
 245
 246   return socket;
 247 }
 248
 249 void GSocket_close(GSocket *socket)
 250 {
 251     _GSocket_Disable_Events(socket);
 252     soclose(socket->m_fd);
 253     socket->m_fd = INVALID_SOCKET;
 254 }
 255
 256 void GSocket_destroy(GSocket *socket)
 257 {
 258   assert(socket != NULL);
 259
 260   /* Check that the socket is really shutdowned */
 261   if (socket->m_fd != INVALID_SOCKET)
 262     GSocket_Shutdown(socket);
 263
 264   /* Per-socket GUI-specific cleanup */
 265   _GSocket_GUI_Destroy_Socket(socket);
 266
 267   /* Destroy private addresses */
 268   if (socket->m_local)
 269     GAddress_destroy(socket->m_local);
 270
 271   if (socket->m_peer)
 272     GAddress_destroy(socket->m_peer);
 273
 274   /* Destroy the socket itself */
 275   free(socket);
 276 }
 277
 278 /* GSocket_Shutdown:
 279  *  Disallow further read/write operations on this socket, close
 280  *  the fd and disable all callbacks.
 281  */
 282 void GSocket_Shutdown(GSocket *socket)
 283 {
 284   int evt;
 285
 286   assert(socket != NULL);
 287
 288   /* If socket has been created, shutdown it */
 289   if (socket->m_fd != INVALID_SOCKET)
 290   {
 291     shutdown(socket->m_fd, 2);
 292     GSocket_close(socket);
 293   }
 294
 295   /* Disable GUI callbacks */
 296   for (evt = 0; evt < GSOCK_MAX_EVENT; evt++)
 297     socket->m_cbacks[evt] = NULL;
 298
 299   socket->m_detected = GSOCK_LOST_FLAG;
 300   _GSocket_Disable_Events(socket);
 301 }
 302
 303 /* Address handling */
 304
 305 /* GSocket_SetLocal:
 306  * GSocket_GetLocal:
 307  * GSocket_SetPeer:
 308  * GSocket_GetPeer:
 309  *  Set or get the local or peer address for this socket. The 'set'
 310  *  functions return GSOCK_NOERROR on success, an error code otherwise.
 311  *  The 'get' functions return a pointer to a GAddress object on success,
 312  *  or NULL otherwise, in which case they set the error code of the
 313  *  corresponding GSocket.
 314  *
 315  *  Error codes:
 316  *    GSOCK_INVSOCK - the socket is not valid.
 317  *    GSOCK_INVADDR - the address is not valid.
 318  */
 319 GSocketError GSocket_SetLocal(GSocket *socket, GAddress *address)
 320 {
 321   assert(socket != NULL);
 322
 323   /* the socket must be initialized, or it must be a server */
 324   if ((socket->m_fd != INVALID_SOCKET && !socket->m_server))
 325   {
 326     socket->m_error = GSOCK_INVSOCK;
 327     return GSOCK_INVSOCK;
 328   }
 329
 330   /* check address */
 331   if (address == NULL || address->m_family == GSOCK_NOFAMILY)
 332   {
 333     socket->m_error = GSOCK_INVADDR;
 334     return GSOCK_INVADDR;
 335   }
 336
 337   if (socket->m_local)
 338     GAddress_destroy(socket->m_local);
 339
 340   socket->m_local = GAddress_copy(address);
 341
 342   return GSOCK_NOERROR;
 343 }
 344
 345 GSocketError GSocket_SetPeer(GSocket *socket, GAddress *address)
 346 {
 347   assert(socket != NULL);
 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_peer)
 357     GAddress_destroy(socket->m_peer);
 358
 359   socket->m_peer = GAddress_copy(address);
 360
 361   return GSOCK_NOERROR;
 362 }
 363
 364 GAddress *GSocket_GetLocal(GSocket *socket)
 365 {
 366   GAddress *address;
 367   struct sockaddr addr;
 368   SOCKLEN_T size = sizeof(addr);
 369   GSocketError err;
 370
 371   assert(socket != NULL);
 372
 373   /* try to get it from the m_local var first */
 374   if (socket->m_local)
 375     return GAddress_copy(socket->m_local);
 376
 377   /* else, if the socket is initialized, try getsockname */
 378   if (socket->m_fd == INVALID_SOCKET)
 379   {
 380     socket->m_error = GSOCK_INVSOCK;
 381     return NULL;
 382   }
 383
 384   if (getsockname(socket->m_fd, &addr, (SOCKLEN_T *) &size) < 0)
 385   {
 386     socket->m_error = GSOCK_IOERR;
 387     return NULL;
 388   }
 389
 390   /* got a valid address from getsockname, create a GAddress object */
 391   address = GAddress_new();
 392   if (address == NULL)
 393   {
 394     socket->m_error = GSOCK_MEMERR;
 395     return NULL;
 396   }
 397
 398   err = _GAddress_translate_from(address, &addr, size);
 399   if (err != GSOCK_NOERROR)
 400   {
 401     GAddress_destroy(address);
 402     socket->m_error = err;
 403     return NULL;
 404   }
 405
 406   return address;
 407 }
 408
 409 GAddress *GSocket_GetPeer(GSocket *socket)
 410 {
 411   assert(socket != NULL);
 412
 413   /* try to get it from the m_peer var */
 414   if (socket->m_peer)
 415     return GAddress_copy(socket->m_peer);
 416
 417   return NULL;
 418 }
 419
 420 /* Server specific parts */
 421
 422 /* GSocket_SetServer:
 423  *  Sets up this socket as a server. The local address must have been
 424  *  set with GSocket_SetLocal() before GSocket_SetServer() is called.
 425  *  Returns GSOCK_NOERROR on success, one of the following otherwise:
 426  *
 427  *  Error codes:
 428  *    GSOCK_INVSOCK - the socket is in use.
 429  *    GSOCK_INVADDR - the local address has not been set.
 430  *    GSOCK_IOERR   - low-level error.
 431  */
 432 GSocketError GSocket_SetServer(GSocket *sck)
 433 {
 434   int arg = 1;
 435
 436   assert(sck != NULL);
 437
 438   /* must not be in use */
 439   if (sck->m_fd != INVALID_SOCKET)
 440   {
 441     sck->m_error = GSOCK_INVSOCK;
 442     return GSOCK_INVSOCK;
 443   }
 444
 445   /* the local addr must have been set */
 446   if (!sck->m_local)
 447   {
 448     sck->m_error = GSOCK_INVADDR;
 449     return GSOCK_INVADDR;
 450   }
 451
 452   /* Initialize all fields */
 453   sck->m_stream   = TRUE;
 454   sck->m_server   = TRUE;
 455   sck->m_oriented = TRUE;
 456
 457   /* Create the socket */
 458   sck->m_fd = socket(sck->m_local->m_realfamily, SOCK_STREAM, 0);
 459
 460   if (sck->m_fd == INVALID_SOCKET)
 461   {
 462     sck->m_error = GSOCK_IOERR;
 463     return GSOCK_IOERR;
 464   }
 465
 466   ioctl(sck->m_fd, FIONBIO, (char*)&arg, sizeof(arg));
 467   _GSocket_Enable_Events(sck);
 468
 469   /* Bind to the local address,
 470    * retrieve the actual address bound,
 471    * and listen up to 5 connections.
 472    */
 473   if ((bind(sck->m_fd, sck->m_local->m_addr, sck->m_local->m_len) != 0) ||
 474       (getsockname(sck->m_fd,
 475                    sck->m_local->m_addr,
 476                    (SOCKLEN_T *) &sck->m_local->m_len) != 0) ||
 477       (listen(sck->m_fd, 5) != 0))
 478   {
 479     GSocket_close(sck);
 480     sck->m_error = GSOCK_IOERR;
 481     return GSOCK_IOERR;
 482   }
 483
 484   return GSOCK_NOERROR;
 485 }
 486
 487 /* GSocket_WaitConnection:
 488  *  Waits for an incoming client connection. Returns a pointer to
 489  *  a GSocket object, or NULL if there was an error, in which case
 490  *  the last error field will be updated for the calling GSocket.
 491  *
 492  *  Error codes (set in the calling GSocket)
 493  *    GSOCK_INVSOCK    - the socket is not valid or not a server.
 494  *    GSOCK_TIMEDOUT   - timeout, no incoming connections.
 495  *    GSOCK_WOULDBLOCK - the call would block and the socket is nonblocking.
 496  *    GSOCK_MEMERR     - couldn't allocate memory.
 497  *    GSOCK_IOERR      - low-level error.
 498  */
 499 GSocket *GSocket_WaitConnection(GSocket *socket)
 500 {
 501   struct sockaddr from;
 502   SOCKLEN_T fromlen = sizeof(from);
 503   GSocket *connection;
 504   GSocketError err;
 505   int arg = 1;
 506
 507   assert(socket != NULL);
 508
 509   /* Reenable CONNECTION events */
 510   _GSocket_Enable(socket, GSOCK_CONNECTION);
 511
 512   /* If the socket has already been created, we exit immediately */
 513   if (socket->m_fd == INVALID_SOCKET || !socket->m_server)
 514   {
 515     socket->m_error = GSOCK_INVSOCK;
 516     return NULL;
 517   }
 518
 519   /* Create a GSocket object for the new connection */
 520   connection = GSocket_new();
 521
 522   if (!connection)
 523   {
 524     socket->m_error = GSOCK_MEMERR;
 525     return NULL;
 526   }
 527
 528   /* Wait for a connection (with timeout) */
 529   if (_GSocket_Input_Timeout(socket) == GSOCK_TIMEDOUT)
 530   {
 531     GSocket_destroy(connection);
 532     /* socket->m_error set by _GSocket_Input_Timeout */
 533     return NULL;
 534   }
 535
 536   connection->m_fd = accept(socket->m_fd, &from, (SOCKLEN_T *) &fromlen);
 537
 538   if (connection->m_fd == INVALID_SOCKET)
 539   {
 540     if (errno == EWOULDBLOCK)
 541       socket->m_error = GSOCK_WOULDBLOCK;
 542     else
 543       socket->m_error = GSOCK_IOERR;
 544
 545     GSocket_destroy(connection);
 546     return NULL;
 547   }
 548
 549   /* Initialize all fields */
 550   connection->m_server   = FALSE;
 551   connection->m_stream   = TRUE;
 552   connection->m_oriented = TRUE;
 553
 554   /* Setup the peer address field */
 555   connection->m_peer = GAddress_new();
 556   if (!connection->m_peer)
 557   {
 558     GSocket_destroy(connection);
 559     socket->m_error = GSOCK_MEMERR;
 560     return NULL;
 561   }
 562   err = _GAddress_translate_from(connection->m_peer, &from, fromlen);
 563   if (err != GSOCK_NOERROR)
 564   {
 565     GAddress_destroy(connection->m_peer);
 566     GSocket_destroy(connection);
 567     socket->m_error = err;
 568     return NULL;
 569   }
 570
 571   ioctl(connection->m_fd, FIONBIO, (char*)&arg, sizeof(arg));
 572   _GSocket_Enable_Events(connection);
 573
 574   return connection;
 575 }
 576
 577 /* Client specific parts */
 578
 579 /* GSocket_Connect:
 580  *  For stream (connection oriented) sockets, GSocket_Connect() tries
 581  *  to establish a client connection to a server using the peer address
 582  *  as established with GSocket_SetPeer(). Returns GSOCK_NOERROR if the
 583  *  connection has been succesfully established, or one of the error
 584  *  codes listed below. Note that for nonblocking sockets, a return
 585  *  value of GSOCK_WOULDBLOCK doesn't mean a failure. The connection
 586  *  request can be completed later; you should use GSocket_Select()
 587  *  to poll for GSOCK_CONNECTION | GSOCK_LOST, or wait for the
 588  *  corresponding asynchronous events.
 589  *
 590  *  For datagram (non connection oriented) sockets, GSocket_Connect()
 591  *  just sets the peer address established with GSocket_SetPeer() as
 592  *  default destination.
 593  *
 594  *  Error codes:
 595  *    GSOCK_INVSOCK    - the socket is in use or not valid.
 596  *    GSOCK_INVADDR    - the peer address has not been established.
 597  *    GSOCK_TIMEDOUT   - timeout, the connection failed.
 598  *    GSOCK_WOULDBLOCK - connection in progress (nonblocking sockets only)
 599  *    GSOCK_MEMERR     - couldn't allocate memory.
 600  *    GSOCK_IOERR      - low-level error.
 601  */
 602 GSocketError GSocket_Connect(GSocket *sck, GSocketStream stream)
 603 {
 604   int err, ret;
 605   int arg = 1;
 606
 607   assert(sck != NULL);
 608
 609   /* Enable CONNECTION events (needed for nonblocking connections) */
 610   _GSocket_Enable(sck, GSOCK_CONNECTION);
 611
 612   if (sck->m_fd != INVALID_SOCKET)
 613   {
 614     sck->m_error = GSOCK_INVSOCK;
 615     return GSOCK_INVSOCK;
 616   }
 617
 618   if (!sck->m_peer)
 619   {
 620     sck->m_error = GSOCK_INVADDR;
 621     return GSOCK_INVADDR;
 622   }
 623
 624   /* Streamed or dgram socket? */
 625   sck->m_stream   = (stream == GSOCK_STREAMED);
 626   sck->m_oriented = TRUE;
 627   sck->m_server   = FALSE;
 628   sck->m_establishing = FALSE;
 629
 630   /* Create the socket */
 631   sck->m_fd = socket(sck->m_peer->m_realfamily,
 632                      sck->m_stream? SOCK_STREAM : SOCK_DGRAM, 0);
 633
 634   if (sck->m_fd == INVALID_SOCKET)
 635   {
 636     sck->m_error = GSOCK_IOERR;
 637     return GSOCK_IOERR;
 638   }
 639
 640   ioctl(sck->m_fd, FIONBIO, (char*)&arg, sizeof(arg));
 641   _GSocket_Enable_Events(sck);
 642
 643   /* Connect it to the peer address, with a timeout (see below) */
 644   ret = connect(sck->m_fd, sck->m_peer->m_addr, sck->m_peer->m_len);
 645
 646   if (ret == -1)
 647   {
 648     err = errno;
 649
 650     /* If connect failed with EINPROGRESS and the GSocket object
 651      * is in blocking mode, we select() for the specified timeout
 652      * checking for writability to see if the connection request
 653      * completes.
 654      */
 655     if ((err == EINPROGRESS) && (!sck->m_non_blocking))
 656     {
 657       if (_GSocket_Output_Timeout(sck) == GSOCK_TIMEDOUT)
 658       {
 659         GSocket_close(sck);
 660         /* sck->m_error is set in _GSocket_Output_Timeout */
 661         return GSOCK_TIMEDOUT;
 662       }
 663       else
 664       {
 665         int error;
 666         SOCKLEN_T len = sizeof(error);
 667
 668         getsockopt(sck->m_fd, SOL_SOCKET, SO_ERROR, (void*) &error, &len);
 669
 670         if (!error)
 671           return GSOCK_NOERROR;
 672       }
 673     }
 674
 675     /* If connect failed with EINPROGRESS and the GSocket object
 676      * is set to nonblocking, we set m_error to GSOCK_WOULDBLOCK
 677      * (and return GSOCK_WOULDBLOCK) but we don't close the socket;
 678      * this way if the connection completes, a GSOCK_CONNECTION
 679      * event will be generated, if enabled.
 680      */
 681     if ((err == EINPROGRESS) && (sck->m_non_blocking))
 682     {
 683       sck->m_establishing = TRUE;
 684       sck->m_error = GSOCK_WOULDBLOCK;
 685       return GSOCK_WOULDBLOCK;
 686     }
 687
 688     /* If connect failed with an error other than EINPROGRESS,
 689      * then the call to GSocket_Connect has failed.
 690      */
 691     GSocket_close(sck);
 692     sck->m_error = GSOCK_IOERR;
 693     return GSOCK_IOERR;
 694   }
 695
 696   return GSOCK_NOERROR;
 697 }
 698
 699 /* Datagram sockets */
 700
 701 /* GSocket_SetNonOriented:
 702  *  Sets up this socket as a non-connection oriented (datagram) socket.
 703  *  Before using this function, the local address must have been set
 704  *  with GSocket_SetLocal(), or the call will fail. Returns GSOCK_NOERROR
 705  *  on success, or one of the following otherwise.
 706  *
 707  *  Error codes:
 708  *    GSOCK_INVSOCK - the socket is in use.
 709  *    GSOCK_INVADDR - the local address has not been set.
 710  *    GSOCK_IOERR   - low-level error.
 711  */
 712 GSocketError GSocket_SetNonOriented(GSocket *sck)
 713 {
 714   int arg = 1;
 715
 716   assert(sck != NULL);
 717
 718   if (sck->m_fd != INVALID_SOCKET)
 719   {
 720     sck->m_error = GSOCK_INVSOCK;
 721     return GSOCK_INVSOCK;
 722   }
 723
 724   if (!sck->m_local)
 725   {
 726     sck->m_error = GSOCK_INVADDR;
 727     return GSOCK_INVADDR;
 728   }
 729
 730   /* Initialize all fields */
 731   sck->m_stream   = FALSE;
 732   sck->m_server   = FALSE;
 733   sck->m_oriented = FALSE;
 734
 735   /* Create the socket */
 736   sck->m_fd = socket(sck->m_local->m_realfamily, SOCK_DGRAM, 0);
 737
 738   if (sck->m_fd == INVALID_SOCKET)
 739   {
 740     sck->m_error = GSOCK_IOERR;
 741     return GSOCK_IOERR;
 742   }
 743
 744   ioctl(sck->m_fd, FIONBIO, (char*)&arg, sizeof(arg));
 745   _GSocket_Enable_Events(sck);
 746
 747   /* Bind to the local address,
 748    * and retrieve the actual address bound.
 749    */
 750   if ((bind(sck->m_fd, sck->m_local->m_addr, sck->m_local->m_len) != 0) ||
 751       (getsockname(sck->m_fd,
 752                    sck->m_local->m_addr,
 753                    (SOCKLEN_T *) &sck->m_local->m_len) != 0))
 754   {
 755     GSocket_close(sck);
 756     sck->m_error = GSOCK_IOERR;
 757     return GSOCK_IOERR;
 758   }
 759
 760   return GSOCK_NOERROR;
 761 }
 762
 763 /* Generic IO */
 764
 765 /* Like recv(), send(), ... */
 766 int GSocket_Read(GSocket *socket, char *buffer, int size)
 767 {
 768   int ret;
 769
 770   assert(socket != NULL);
 771
 772   /* Reenable INPUT events */
 773   _GSocket_Enable(socket, GSOCK_INPUT);
 774
 775   if (socket->m_fd == INVALID_SOCKET || socket->m_server)
 776   {
 777     socket->m_error = GSOCK_INVSOCK;
 778     return -1;
 779   }
 780
 781   /* If the socket is blocking, wait for data (with a timeout) */
 782   if (_GSocket_Input_Timeout(socket) == GSOCK_TIMEDOUT)
 783     return -1;
 784
 785   /* Read the data */
 786   if (socket->m_stream)
 787     ret = _GSocket_Recv_Stream(socket, buffer, size);
 788   else
 789     ret = _GSocket_Recv_Dgram(socket, buffer, size);
 790
 791   if (ret == -1)
 792   {
 793     if (errno == EWOULDBLOCK)
 794       socket->m_error = GSOCK_WOULDBLOCK;
 795     else
 796       socket->m_error = GSOCK_IOERR;
 797   }
 798
 799   return ret;
 800 }
 801
 802 int GSocket_Write(GSocket *socket, const char *buffer, int size)
 803 {
 804   int ret;
 805
 806   assert(socket != NULL);
 807
 808   GSocket_Debug(( "GSocket_Write #1, size %d\n", size ));
 809
 810   if (socket->m_fd == INVALID_SOCKET || socket->m_server)
 811   {
 812     socket->m_error = GSOCK_INVSOCK;
 813     return -1;
 814   }
 815
 816   GSocket_Debug(( "GSocket_Write #2, size %d\n", size ));
 817
 818   /* If the socket is blocking, wait for writability (with a timeout) */
 819   if (_GSocket_Output_Timeout(socket) == GSOCK_TIMEDOUT)
 820     return -1;
 821
 822   GSocket_Debug(( "GSocket_Write #3, size %d\n", size ));
 823
 824   /* Write the data */
 825   if (socket->m_stream)
 826     ret = _GSocket_Send_Stream(socket, buffer, size);
 827   else
 828     ret = _GSocket_Send_Dgram(socket, buffer, size);
 829
 830   GSocket_Debug(( "GSocket_Write #4, size %d\n", size ));
 831
 832   if (ret == -1)
 833   {
 834     if (errno == EWOULDBLOCK)
 835     {
 836       socket->m_error = GSOCK_WOULDBLOCK;
 837       GSocket_Debug(( "GSocket_Write error WOULDBLOCK\n" ));
 838     }
 839     else
 840     {
 841       socket->m_error = GSOCK_IOERR;
 842       GSocket_Debug(( "GSocket_Write error IOERR\n" ));
 843     }
 844
 845     /* Only reenable OUTPUT events after an error (just like WSAAsyncSelect
 846      * in MSW). Once the first OUTPUT event is received, users can assume
 847      * that the socket is writable until a read operation fails. Only then
 848      * will further OUTPUT events be posted.
 849      */
 850     _GSocket_Enable(socket, GSOCK_OUTPUT);
 851     return -1;
 852   }
 853
 854   GSocket_Debug(( "GSocket_Write #5, size %d ret %d\n", size, ret ));
 855
 856   return ret;
 857 }
 858
 859 /* GSocket_Select:
 860  *  Polls the socket to determine its status. This function will
 861  *  check for the events specified in the 'flags' parameter, and
 862  *  it will return a mask indicating which operations can be
 863  *  performed. This function won't block, regardless of the
 864  *  mode (blocking | nonblocking) of the socket.
 865  */
 866 GSocketEventFlags GSocket_Select(GSocket *socket, GSocketEventFlags flags)
 867 {
 868   if (!USE_GUI())
 869   {
 870
 871     GSocketEventFlags result = 0;
 872     fd_set readfds;
 873     fd_set writefds;
 874     fd_set exceptfds;
 875     struct timeval tv;
 876
 877     /* Do not use a static struct, Linux can garble it */
 878     tv.tv_sec = 0;
 879     tv.tv_usec = 0;
 880
 881     assert(socket != NULL);
 882
 883     FD_ZERO(&readfds);
 884     FD_ZERO(&writefds);
 885     FD_ZERO(&exceptfds);
 886     FD_SET(socket->m_fd, &readfds);
 887     FD_SET(socket->m_fd, &writefds);
 888     FD_SET(socket->m_fd, &exceptfds);
 889
 890     /* Check 'sticky' CONNECTION flag first */
 891     result |= (GSOCK_CONNECTION_FLAG & socket->m_detected);
 892
 893     /* If we have already detected a LOST event, then don't try
 894      * to do any further processing.
 895      */
 896     if ((socket->m_detected & GSOCK_LOST_FLAG) != 0)
 897     {
 898       socket->m_establishing = FALSE;
 899
 900       return (GSOCK_LOST_FLAG & flags);
 901     }
 902
 903     /* Try select now */
 904     if (select(socket->m_fd + 1, &readfds, &writefds, &exceptfds, &tv) <= 0)
 905     {
 906       /* What to do here? */
 907       return (result & flags);
 908     }
 909
 910     /* Check for readability */
 911     if (FD_ISSET(socket->m_fd, &readfds))
 912     {
 913       char c;
 914
 915       if (recv(socket->m_fd, &c, 1, MSG_PEEK) > 0)
 916       {
 917         result |= GSOCK_INPUT_FLAG;
 918       }
 919       else
 920       {
 921         if (socket->m_server && socket->m_stream)
 922         {
 923           result |= GSOCK_CONNECTION_FLAG;
 924           socket->m_detected |= GSOCK_CONNECTION_FLAG;
 925         }
 926         else
 927         {
 928           socket->m_detected = GSOCK_LOST_FLAG;
 929           socket->m_establishing = FALSE;
 930
 931           /* LOST event: Abort any further processing */
 932           return (GSOCK_LOST_FLAG & flags);
 933         }
 934       }
 935     }
 936
 937     /* Check for writability */
 938     if (FD_ISSET(socket->m_fd, &writefds))
 939     {
 940       if (socket->m_establishing && !socket->m_server)
 941       {
 942         int error;
 943         SOCKLEN_T len = sizeof(error);
 944
 945         socket->m_establishing = FALSE;
 946
 947         getsockopt(socket->m_fd, SOL_SOCKET, SO_ERROR, (void*)&error, &len);
 948
 949         if (error)
 950         {
 951           socket->m_detected = GSOCK_LOST_FLAG;
 952
 953           /* LOST event: Abort any further processing */
 954           return (GSOCK_LOST_FLAG & flags);
 955         }
 956         else
 957         {
 958           result |= GSOCK_CONNECTION_FLAG;
 959           socket->m_detected |= GSOCK_CONNECTION_FLAG;
 960         }
 961       }
 962       else
 963       {
 964         result |= GSOCK_OUTPUT_FLAG;
 965       }
 966     }
 967
 968     /* Check for exceptions and errors (is this useful in Unices?) */
 969     if (FD_ISSET(socket->m_fd, &exceptfds))
 970     {
 971       socket->m_establishing = FALSE;
 972       socket->m_detected = GSOCK_LOST_FLAG;
 973
 974       /* LOST event: Abort any further processing */
 975       return (GSOCK_LOST_FLAG & flags);
 976     }
 977
 978     return (result & flags);
 979
 980   }
 981   else
 982   {
 983
 984     assert(socket != NULL);
 985     return flags & socket->m_detected;
 986
 987   }
 988 }
 989
 990 /* Flags */
 991
 992 /* GSocket_SetNonBlocking:
 993  *  Sets the socket to non-blocking mode. All IO calls will return
 994  *  immediately.
 995  */
 996 void GSocket_SetNonBlocking(GSocket *socket, int non_block)
 997 {
 998   assert(socket != NULL);
 999
1000   GSocket_Debug( ("GSocket_SetNonBlocking: %d\n", (int)non_block) );
1001
1002   socket->m_non_blocking = non_block;
1003 }
1004
1005 /* GSocket_SetTimeout:
1006  *  Sets the timeout for blocking calls. Time is expressed in
1007  *  milliseconds.
1008  */
1009 void GSocket_SetTimeout(GSocket *socket, unsigned long millisec)
1010 {
1011   assert(socket != NULL);
1012
1013   socket->m_timeout = millisec;
1014 }
1015
1016 /* GSocket_GetError:
1017  *  Returns the last error occured for this socket. Note that successful
1018  *  operations do not clear this back to GSOCK_NOERROR, so use it only
1019  *  after an error.
1020  */
1021 GSocketError GSocket_GetError(GSocket *socket)
1022 {
1023   assert(socket != NULL);
1024
1025   return socket->m_error;
1026 }
1027
1028 /* Callbacks */
1029
1030 /* GSOCK_INPUT:
1031  *   There is data to be read in the input buffer. If, after a read
1032  *   operation, there is still data available, the callback function will
1033  *   be called again.
1034  * GSOCK_OUTPUT:
1035  *   The socket is available for writing. That is, the next write call
1036  *   won't block. This event is generated only once, when the connection is
1037  *   first established, and then only if a call failed with GSOCK_WOULDBLOCK,
1038  *   when the output buffer empties again. This means that the app should
1039  *   assume that it can write since the first OUTPUT event, and no more
1040  *   OUTPUT events will be generated unless an error occurs.
1041  * GSOCK_CONNECTION:
1042  *   Connection succesfully established, for client sockets, or incoming
1043  *   client connection, for server sockets. Wait for this event (also watch
1044  *   out for GSOCK_LOST) after you issue a nonblocking GSocket_Connect() call.
1045  * GSOCK_LOST:
1046  *   The connection is lost (or a connection request failed); this could
1047  *   be due to a failure, or due to the peer closing it gracefully.
1048  */
1049
1050 /* GSocket_SetCallback:
1051  *  Enables the callbacks specified by 'flags'. Note that 'flags'
1052  *  may be a combination of flags OR'ed toghether, so the same
1053  *  callback function can be made to accept different events.
1054  *  The callback function must have the following prototype:
1055  *
1056  *  void function(GSocket *socket, GSocketEvent event, char *cdata)
1057  */
1058 void GSocket_SetCallback(GSocket *socket, GSocketEventFlags flags,
1059                          GSocketCallback callback, char *cdata)
1060 {
1061   int count;
1062
1063   assert(socket != NULL);
1064
1065   for (count = 0; count < GSOCK_MAX_EVENT; count++)
1066   {
1067     if ((flags & (1 << count)) != 0)
1068     {
1069       socket->m_cbacks[count] = callback;
1070       socket->m_data[count] = cdata;
1071     }
1072   }
1073 }
1074
1075 /* GSocket_UnsetCallback:
1076  *  Disables all callbacks specified by 'flags', which may be a
1077  *  combination of flags OR'ed toghether.
1078  */
1079 void GSocket_UnsetCallback(GSocket *socket, GSocketEventFlags flags)
1080 {
1081   int count;
1082
1083   assert(socket != NULL);
1084
1085   for (count = 0; count < GSOCK_MAX_EVENT; count++)
1086   {
1087     if ((flags & (1 << count)) != 0)
1088     {
1089       socket->m_cbacks[count] = NULL;
1090       socket->m_data[count] = NULL;
1091     }
1092   }
1093 }
1094
1095
1096 #define CALL_CALLBACK(socket, event) {                                  \
1097   _GSocket_Disable(socket, event);                                      \
1098   if (socket->m_cbacks[event])                                          \
1099     socket->m_cbacks[event](socket, event, socket->m_data[event]);      \
1100 }
1101
1102
1103 void _GSocket_Enable(GSocket *socket, GSocketEvent event)
1104 {
1105   socket->m_detected &= ~(1 << event);
1106   _GSocket_Install_Callback(socket, event);
1107 }
1108
1109 void _GSocket_Disable(GSocket *socket, GSocketEvent event)
1110 {
1111   socket->m_detected |= (1 << event);
1112   _GSocket_Uninstall_Callback(socket, event);
1113 }
1114
1115 /* _GSocket_Input_Timeout:
1116  *  For blocking sockets, wait until data is available or
1117  *  until timeout ellapses.
1118  */
1119 GSocketError _GSocket_Input_Timeout(GSocket *socket)
1120 {
1121   struct timeval tv;
1122   fd_set readfds;
1123   int ret;
1124
1125   /* Linux select() will overwrite the struct on return */
1126   tv.tv_sec  = (socket->m_timeout / 1000);
1127   tv.tv_usec = (socket->m_timeout % 1000) * 1000;
1128
1129   if (!socket->m_non_blocking)
1130   {
1131     FD_ZERO(&readfds);
1132     FD_SET(socket->m_fd, &readfds);
1133     ret = select(socket->m_fd + 1, &readfds, NULL, NULL, &tv);
1134     if (ret == 0)
1135     {
1136       GSocket_Debug(( "GSocket_Input_Timeout, select returned 0\n" ));
1137       socket->m_error = GSOCK_TIMEDOUT;
1138       return GSOCK_TIMEDOUT;
1139     }
1140     if (ret == -1)
1141     {
1142       GSocket_Debug(( "GSocket_Input_Timeout, select returned -1\n" ));
1143       if (errno == EBADF) GSocket_Debug(( "Invalid file descriptor\n" ));
1144       if (errno == EINTR) GSocket_Debug(( "A non blocked signal was caught\n" ));
1145       if (errno == EINVAL) GSocket_Debug(( "The highest number descriptor is negative\n" ));
1146       if (errno == ENOMEM) GSocket_Debug(( "Not enough memory\n" ));
1147       socket->m_error = GSOCK_TIMEDOUT;
1148       return GSOCK_TIMEDOUT;
1149     }
1150   }
1151   return GSOCK_NOERROR;
1152 }
1153
1154 /* _GSocket_Output_Timeout:
1155  *  For blocking sockets, wait until data can be sent without
1156  *  blocking or until timeout ellapses.
1157  */
1158 GSocketError _GSocket_Output_Timeout(GSocket *socket)
1159 {
1160   struct timeval tv;
1161   fd_set writefds;
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   GSocket_Debug( ("m_non_blocking has: %d\n", (int)socket->m_non_blocking) );
1169
1170   if (!socket->m_non_blocking)
1171   {
1172     FD_ZERO(&writefds);
1173     FD_SET(socket->m_fd, &writefds);
1174     ret = select(socket->m_fd + 1, NULL, &writefds, NULL, &tv);
1175     if (ret == 0)
1176     {
1177       GSocket_Debug(( "GSocket_Output_Timeout, select returned 0\n" ));
1178       socket->m_error = GSOCK_TIMEDOUT;
1179       return GSOCK_TIMEDOUT;
1180     }
1181     if (ret == -1)
1182     {
1183       GSocket_Debug(( "GSocket_Output_Timeout, select returned -1\n" ));
1184       if (errno == EBADF) GSocket_Debug(( "Invalid file descriptor\n" ));
1185       if (errno == EINTR) GSocket_Debug(( "A non blocked signal was caught\n" ));
1186       if (errno == EINVAL) GSocket_Debug(( "The highest number descriptor is negative\n" ));
1187       if (errno == ENOMEM) GSocket_Debug(( "Not enough memory\n" ));
1188       socket->m_error = GSOCK_TIMEDOUT;
1189       return GSOCK_TIMEDOUT;
1190     }
1191     if ( ! FD_ISSET(socket->m_fd, &writefds) )
1192       GSocket_Debug(( "GSocket_Output_Timeout is buggy!\n" ));
1193     else
1194       GSocket_Debug(( "GSocket_Output_Timeout seems correct\n" ));
1195   }
1196   else
1197   {
1198     GSocket_Debug(( "GSocket_Output_Timeout, didn't try select!\n" ));
1199   }
1200
1201   return GSOCK_NOERROR;
1202 }
1203
1204 int _GSocket_Recv_Stream(GSocket *socket, char *buffer, int size)
1205 {
1206   return recv(socket->m_fd, buffer, size, 0);
1207 }
1208
1209 int _GSocket_Recv_Dgram(GSocket *socket, char *buffer, int size)
1210 {
1211   struct sockaddr from;
1212   SOCKLEN_T fromlen = sizeof(from);
1213   int ret;
1214   GSocketError err;
1215
1216   fromlen = sizeof(from);
1217
1218   ret = recvfrom(socket->m_fd, buffer, size, 0, &from, (SOCKLEN_T *) &fromlen);
1219
1220   if (ret == -1)
1221     return -1;
1222
1223   /* Translate a system address into a GSocket address */
1224   if (!socket->m_peer)
1225   {
1226     socket->m_peer = GAddress_new();
1227     if (!socket->m_peer)
1228     {
1229       socket->m_error = GSOCK_MEMERR;
1230       return -1;
1231     }
1232   }
1233   err = _GAddress_translate_from(socket->m_peer, &from, fromlen);
1234   if (err != GSOCK_NOERROR)
1235   {
1236     GAddress_destroy(socket->m_peer);
1237     socket->m_peer  = NULL;
1238     socket->m_error = err;
1239     return -1;
1240   }
1241
1242   return ret;
1243 }
1244
1245 int _GSocket_Send_Stream(GSocket *socket, const char *buffer, int size)
1246 {
1247   int ret;
1248
1249 #ifdef __EMX__
1250   MASK_SIGNAL();
1251   ret = send(socket->m_fd, buffer, size, 0);
1252   UNMASK_SIGNAL();
1253 #else
1254   ret = send(socket->m_fd, (char *)buffer, size, 0);
1255 #endif
1256   return ret;
1257 }
1258
1259 int _GSocket_Send_Dgram(GSocket *socket, const char *buffer, int size)
1260 {
1261   struct sockaddr *addr;
1262   int len, ret;
1263   GSocketError err;
1264
1265   if (!socket->m_peer)
1266   {
1267     socket->m_error = GSOCK_INVADDR;
1268     return -1;
1269   }
1270
1271   err = _GAddress_translate_to(socket->m_peer, &addr, &len);
1272   if (err != GSOCK_NOERROR)
1273   {
1274     socket->m_error = err;
1275     return -1;
1276   }
1277
1278 #ifdef __EMX__
1279   MASK_SIGNAL();
1280   ret = sendto(socket->m_fd, buffer, size, 0, addr, len);
1281   UNMASK_SIGNAL();
1282 #else
1283   ret = sendto(socket->m_fd, (char *)buffer, size, 0, addr, len);
1284 #endif
1285
1286   /* Frees memory allocated from _GAddress_translate_to */
1287   free(addr);
1288
1289   return ret;
1290 }
1291
1292 void _GSocket_Detected_Read(GSocket *socket)
1293 {
1294   char c;
1295
1296   /* If we have already detected a LOST event, then don't try
1297    * to do any further processing.
1298    */
1299   if ((socket->m_detected & GSOCK_LOST_FLAG) != 0)
1300   {
1301     socket->m_establishing = FALSE;
1302
1303     CALL_CALLBACK(socket, GSOCK_LOST);
1304     GSocket_Shutdown(socket);
1305     return;
1306   }
1307
1308   if (recv(socket->m_fd, &c, 1, MSG_PEEK) > 0)
1309   {
1310     CALL_CALLBACK(socket, GSOCK_INPUT);
1311   }
1312   else
1313   {
1314     if (socket->m_server && socket->m_stream)
1315     {
1316       CALL_CALLBACK(socket, GSOCK_CONNECTION);
1317     }
1318     else
1319     {
1320       CALL_CALLBACK(socket, GSOCK_LOST);
1321       GSocket_Shutdown(socket);
1322     }
1323   }
1324 }
1325
1326 void _GSocket_Detected_Write(GSocket *socket)
1327 {
1328   /* If we have already detected a LOST event, then don't try
1329    * to do any further processing.
1330    */
1331   if ((socket->m_detected & GSOCK_LOST_FLAG) != 0)
1332   {
1333     socket->m_establishing = FALSE;
1334
1335     CALL_CALLBACK(socket, GSOCK_LOST);
1336     GSocket_Shutdown(socket);
1337     return;
1338   }
1339
1340   if (socket->m_establishing && !socket->m_server)
1341   {
1342     int error;
1343     SOCKLEN_T len = sizeof(error);
1344
1345     socket->m_establishing = FALSE;
1346
1347     getsockopt(socket->m_fd, SOL_SOCKET, SO_ERROR, (void*)&error, &len);
1348
1349     if (error)
1350     {
1351       CALL_CALLBACK(socket, GSOCK_LOST);
1352       GSocket_Shutdown(socket);
1353     }
1354     else
1355     {
1356       CALL_CALLBACK(socket, GSOCK_CONNECTION);
1357       /* We have to fire this event by hand because CONNECTION (for clients)
1358        * and OUTPUT are internally the same and we just disabled CONNECTION
1359        * events with the above macro.
1360        */
1361       CALL_CALLBACK(socket, GSOCK_OUTPUT);
1362     }
1363   }
1364   else
1365   {
1366     CALL_CALLBACK(socket, GSOCK_OUTPUT);
1367   }
1368 }
1369
1370 /*
1371  * -------------------------------------------------------------------------
1372  * GAddress
1373  * -------------------------------------------------------------------------
1374  */
1375
1376 /* CHECK_ADDRESS verifies that the current address family is either
1377  * GSOCK_NOFAMILY or GSOCK_*family*, and if it is GSOCK_NOFAMILY, it
1378  * initalizes it to be a GSOCK_*family*. In other cases, it returns
1379  * an appropiate error code.
1380  *
1381  * CHECK_ADDRESS_RETVAL does the same but returning 'retval' on error.
1382  */
1383 #define CHECK_ADDRESS(address, family)                              \
1384 {                                                                   \
1385   if (address->m_family == GSOCK_NOFAMILY)                          \
1386     if (_GAddress_Init_##family(address) != GSOCK_NOERROR)          \
1387       return address->m_error;                                      \
1388   if (address->m_family != GSOCK_##family)                          \
1389   {                                                                 \
1390     address->m_error = GSOCK_INVADDR;                               \
1391     return GSOCK_INVADDR;                                           \
1392   }                                                                 \
1393 }
1394
1395 #define CHECK_ADDRESS_RETVAL(address, family, retval)               \
1396 {                                                                   \
1397   if (address->m_family == GSOCK_NOFAMILY)                          \
1398     if (_GAddress_Init_##family(address) != GSOCK_NOERROR)          \
1399       return retval;                                                \
1400   if (address->m_family != GSOCK_##family)                          \
1401   {                                                                 \
1402     address->m_error = GSOCK_INVADDR;                               \
1403     return retval;                                                  \
1404   }                                                                 \
1405 }
1406
1407
1408 GAddress *GAddress_new(void)
1409 {
1410   GAddress *address;
1411
1412   if ((address = (GAddress *) malloc(sizeof(GAddress))) == NULL)
1413     return NULL;
1414
1415   address->m_family  = GSOCK_NOFAMILY;
1416   address->m_addr    = NULL;
1417   address->m_len     = 0;
1418
1419   return address;
1420 }
1421
1422 GAddress *GAddress_copy(GAddress *address)
1423 {
1424   GAddress *addr2;
1425
1426   assert(address != NULL);
1427
1428   if ((addr2 = (GAddress *) malloc(sizeof(GAddress))) == NULL)
1429     return NULL;
1430
1431   memcpy(addr2, address, sizeof(GAddress));
1432
1433   if (address->m_addr && address->m_len > 0)
1434   {
1435     addr2->m_addr = (struct sockaddr *)malloc(addr2->m_len);
1436     if (addr2->m_addr == NULL)
1437     {
1438       free(addr2);
1439       return NULL;
1440     }
1441     memcpy(addr2->m_addr, address->m_addr, addr2->m_len);
1442   }
1443
1444   return addr2;
1445 }
1446
1447 void GAddress_destroy(GAddress *address)
1448 {
1449   assert(address != NULL);
1450
1451   if (address->m_addr)
1452     free(address->m_addr);
1453
1454 /*    free(address); */
1455 }
1456
1457 void GAddress_SetFamily(GAddress *address, GAddressType type)
1458 {
1459   assert(address != NULL);
1460
1461   address->m_family = type;
1462 }
1463
1464 GAddressType GAddress_GetFamily(GAddress *address)
1465 {
1466   assert(address != NULL);
1467
1468   return address->m_family;
1469 }
1470
1471 GSocketError _GAddress_translate_from(GAddress *address,
1472                                       struct sockaddr *addr, int len)
1473 {
1474   address->m_realfamily = addr->sa_family;
1475   switch (addr->sa_family)
1476   {
1477     case AF_INET:
1478       address->m_family = GSOCK_INET;
1479       break;
1480     case AF_UNIX:
1481       address->m_family = GSOCK_UNIX;
1482       break;
1483 #ifdef AF_INET6
1484     case AF_INET6:
1485       address->m_family = GSOCK_INET6;
1486       break;
1487 #endif
1488     default:
1489     {
1490       address->m_error = GSOCK_INVOP;
1491       return GSOCK_INVOP;
1492     }
1493   }
1494
1495   if (address->m_addr)
1496     free(address->m_addr);
1497
1498   address->m_len  = len;
1499   address->m_addr = (struct sockaddr *)malloc(len);
1500
1501   if (address->m_addr == NULL)
1502   {
1503     address->m_error = GSOCK_MEMERR;
1504     return GSOCK_MEMERR;
1505   }
1506   memcpy(address->m_addr, addr, len);
1507
1508   return GSOCK_NOERROR;
1509 }
1510
1511 GSocketError _GAddress_translate_to(GAddress *address,
1512                                     struct sockaddr **addr, int *len)
1513 {
1514   if (!address->m_addr)
1515   {
1516     address->m_error = GSOCK_INVADDR;
1517     return GSOCK_INVADDR;
1518   }
1519
1520   *len = address->m_len;
1521   *addr = (struct sockaddr *)malloc(address->m_len);
1522   if (*addr == NULL)
1523   {
1524     address->m_error = GSOCK_MEMERR;
1525     return GSOCK_MEMERR;
1526   }
1527
1528   memcpy(*addr, address->m_addr, address->m_len);
1529   return GSOCK_NOERROR;
1530 }
1531
1532 /*
1533  * -------------------------------------------------------------------------
1534  * Internet address family
1535  * -------------------------------------------------------------------------
1536  */
1537
1538 GSocketError _GAddress_Init_INET(GAddress *address)
1539 {
1540   address->m_len  = sizeof(struct sockaddr_in);
1541   address->m_addr = (struct sockaddr *) malloc(address->m_len);
1542   if (address->m_addr == NULL)
1543   {
1544     address->m_error = GSOCK_MEMERR;
1545     return GSOCK_MEMERR;
1546   }
1547
1548   address->m_family = GSOCK_INET;
1549   address->m_realfamily = PF_INET;
1550   ((struct sockaddr_in *)address->m_addr)->sin_family = AF_INET;
1551   ((struct sockaddr_in *)address->m_addr)->sin_addr.s_addr = INADDR_ANY;
1552
1553   return GSOCK_NOERROR;
1554 }
1555
1556 GSocketError GAddress_INET_SetHostName(GAddress *address, const char *hostname)
1557 {
1558   struct hostent *he;
1559   struct in_addr *addr;
1560
1561   assert(address != NULL);
1562
1563   CHECK_ADDRESS(address, INET);
1564
1565   addr = &(((struct sockaddr_in *)address->m_addr)->sin_addr);
1566
1567   /* If it is a numeric host name, convert it now */
1568 #if defined(HAVE_INET_ATON)
1569   if (inet_aton(hostname, addr) == 0)
1570   {
1571 #elif defined(HAVE_INET_ADDR)
1572   addr->s_addr = inet_addr(hostname);
1573   if ( addr->s_addr == -1 )
1574   {
1575 #else
1576   /* Use gethostbyname by default */
1577   int val = 1;  //VA doesn't like constants in conditional expressions at all
1578   if (val)
1579   {
1580 #endif
1581     struct in_addr *array_addr;
1582
1583     /* It is a real name, we solve it */
1584     if ((he = gethostbyname(hostname)) == NULL)
1585     {
1586       /* Reset to invalid address */
1587       addr->s_addr = INADDR_NONE;
1588       address->m_error = GSOCK_NOHOST;
1589       return GSOCK_NOHOST;
1590     }
1591     array_addr = (struct in_addr *) *(he->h_addr_list);
1592     addr->s_addr = array_addr[0].s_addr;
1593   }
1594   return GSOCK_NOERROR;
1595 }
1596
1597 GSocketError GAddress_INET_SetAnyAddress(GAddress *address)
1598 {
1599   return GAddress_INET_SetHostAddress(address, INADDR_ANY);
1600 }
1601
1602 GSocketError GAddress_INET_SetHostAddress(GAddress *address,
1603                                           unsigned long hostaddr)
1604 {
1605   struct in_addr *addr;
1606
1607   assert(address != NULL);
1608
1609   CHECK_ADDRESS(address, INET);
1610
1611   addr = &(((struct sockaddr_in *)address->m_addr)->sin_addr);
1612   addr->s_addr = hostaddr;
1613
1614   return GSOCK_NOERROR;
1615 }
1616
1617 GSocketError GAddress_INET_SetPortName(GAddress *address, const char *port,
1618                                        const char *protocol)
1619 {
1620   struct servent *se;
1621   struct sockaddr_in *addr;
1622
1623   assert(address != NULL);
1624   CHECK_ADDRESS(address, INET);
1625
1626   if (!port)
1627   {
1628     address->m_error = GSOCK_INVPORT;
1629     return GSOCK_INVPORT;
1630   }
1631
1632   se = getservbyname(port, protocol);
1633   if (!se)
1634   {
1635     /* the cast to int suppresses compiler warnings about subscript having the
1636        type char */
1637     if (isdigit((int)port[0]))
1638     {
1639       int port_int;
1640
1641       port_int = atoi(port);
1642       addr = (struct sockaddr_in *)address->m_addr;
1643       addr->sin_port = htons(port_int);
1644       return GSOCK_NOERROR;
1645     }
1646
1647     address->m_error = GSOCK_INVPORT;
1648     return GSOCK_INVPORT;
1649   }
1650
1651   addr = (struct sockaddr_in *)address->m_addr;
1652   addr->sin_port = se->s_port;
1653
1654   return GSOCK_NOERROR;
1655 }
1656
1657 GSocketError GAddress_INET_SetPort(GAddress *address, unsigned short port)
1658 {
1659   struct sockaddr_in *addr;
1660
1661   assert(address != NULL);
1662   CHECK_ADDRESS(address, INET);
1663
1664   addr = (struct sockaddr_in *)address->m_addr;
1665   addr->sin_port = htons(port);
1666
1667   return GSOCK_NOERROR;
1668 }
1669
1670 GSocketError GAddress_INET_GetHostName(GAddress *address, char *hostname, size_t sbuf)
1671 {
1672   struct hostent *he;
1673   char *addr_buf;
1674   struct sockaddr_in *addr;
1675
1676   assert(address != NULL);
1677   CHECK_ADDRESS(address, INET);
1678
1679   addr = (struct sockaddr_in *)address->m_addr;
1680   addr_buf = (char *)&(addr->sin_addr);
1681
1682   he = gethostbyaddr(addr_buf, sizeof(addr->sin_addr), AF_INET);
1683   if (he == NULL)
1684   {
1685     address->m_error = GSOCK_NOHOST;
1686     return GSOCK_NOHOST;
1687   }
1688
1689   strncpy(hostname, he->h_name, sbuf);
1690
1691   return GSOCK_NOERROR;
1692 }
1693
1694 unsigned long GAddress_INET_GetHostAddress(GAddress *address)
1695 {
1696   struct sockaddr_in *addr;
1697
1698   assert(address != NULL);
1699   CHECK_ADDRESS_RETVAL(address, INET, 0);
1700
1701   addr = (struct sockaddr_in *)address->m_addr;
1702
1703   return addr->sin_addr.s_addr;
1704 }
1705
1706 unsigned short GAddress_INET_GetPort(GAddress *address)
1707 {
1708   struct sockaddr_in *addr;
1709
1710   assert(address != NULL);
1711   CHECK_ADDRESS_RETVAL(address, INET, 0);
1712
1713   addr = (struct sockaddr_in *)address->m_addr;
1714   return ntohs(addr->sin_port);
1715 }
1716
1717 /*
1718  * -------------------------------------------------------------------------
1719  * Unix address family
1720  * -------------------------------------------------------------------------
1721  */
1722
1723 #ifdef __EMX__
1724 GSocketError _GAddress_Init_UNIX(GAddress *address)
1725 {
1726   address->m_len  = sizeof(struct sockaddr_un);
1727   address->m_addr = (struct sockaddr *)malloc(address->m_len);
1728   if (address->m_addr == NULL)
1729   {
1730     address->m_error = GSOCK_MEMERR;
1731     return GSOCK_MEMERR;
1732   }
1733
1734   address->m_family = GSOCK_UNIX;
1735   address->m_realfamily = PF_UNIX;
1736   ((struct sockaddr_un *)address->m_addr)->sun_family = AF_UNIX;
1737   ((struct sockaddr_un *)address->m_addr)->sun_path[0] = 0;
1738
1739   return GSOCK_NOERROR;
1740 }
1741
1742 #define UNIX_SOCK_PATHLEN (sizeof(addr->sun_path)/sizeof(addr->sun_path[0]))
1743
1744 GSocketError GAddress_UNIX_SetPath(GAddress *address, const char *path)
1745 {
1746   struct sockaddr_un *addr;
1747
1748   assert(address != NULL);
1749
1750   CHECK_ADDRESS(address, UNIX);
1751
1752   addr = ((struct sockaddr_un *)address->m_addr);
1753   strncpy(addr->sun_path, path, UNIX_SOCK_PATHLEN);
1754   addr->sun_path[UNIX_SOCK_PATHLEN - 1] = '\0';
1755
1756   return GSOCK_NOERROR;
1757 }
1758
1759 GSocketError GAddress_UNIX_GetPath(GAddress *address, char *path, size_t sbuf)
1760 {
1761   struct sockaddr_un *addr;
1762
1763   assert(address != NULL);
1764   CHECK_ADDRESS(address, UNIX);
1765
1766   addr = (struct sockaddr_un *)address->m_addr;
1767
1768   strncpy(path, addr->sun_path, sbuf);
1769
1770   return GSOCK_NOERROR;
1771 }
1772 #endif
1773   /* __EMX__ */
1774 #endif
1775   /* wxUSE_SOCKETS || defined(__GSOCKET_STANDALONE__) */
1776