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