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