src/unix/gsocket.c

   1 /* -------------------------------------------------------------------------
   2  * Project: GSocket (Generic Socket) for WX
   3  * Name:    gsocket.c
   4  * Authors: Guilhem Lavaux,
   5  *          Guillermo Rodriguez Garcia <guille@iies.es> (maintainer)
   6  * Purpose: GSocket main Unix and OS/2 file
   7  * Licence: The wxWidgets licence
   8  * CVSID:   $Id$
   9  * -------------------------------------------------------------------------
  10  */
  11
  12 /*
  13  * PLEASE don't put C++ comments here - this is a C source file.
  14  */
  15
  16 #ifndef __GSOCKET_STANDALONE__
  17 #include "wx/setup.h"
  18 #endif
  19
  20 #if defined(__VISAGECPP__)
  21 /* Seems to be needed by Visual Age C++, though I don't see how it manages
  22    to not break on including a C++ header into a plain C source file      */
  23 #include "wx/defs.h"
  24 #define BSD_SELECT /* use Berkley Sockets select */
  25 #endif
  26
  27 #if wxUSE_SOCKETS || defined(__GSOCKET_STANDALONE__)
  28
  29 #include <assert.h>
  30 #include <sys/types.h>
  31 #ifdef __VISAGECPP__
  32 #include <string.h>
  33 #include <sys/time.h>
  34 #include <types.h>
  35 #include <netinet/in.h>
  36 #endif
  37 #include <netdb.h>
  38 #include <sys/ioctl.h>
  39
  40 #ifdef __VMS__
  41 #include <socket.h>
  42 struct sockaddr_un
  43 {
  44     u_char  sun_len;        /* sockaddr len including null */
  45     u_char  sun_family;     /* AF_UNIX */
  46     char    sun_path[108];  /* path name (gag) */
  47 };
  48 #else
  49 #include <sys/socket.h>
  50 #include <sys/un.h>
  51 #endif
  52
  53 #ifndef __VISAGECPP__
  54 #include <sys/time.h>
  55 #include <netinet/in.h>
  56 #include <arpa/inet.h>
  57 #include <errno.h>
  58 #include <string.h>
  59 #include <unistd.h>
  60 #else
  61 #include <nerrno.h>
  62 #  if __IBMCPP__ < 400
  63 #include <machine/endian.h>
  64 #include <socket.h>
  65 #include <ioctl.h>
  66 #include <select.h>
  67 #include <unistd.h>
  68
  69 #define EBADF   SOCEBADF
  70
  71 #    ifdef min
  72 #    undef min
  73 #    endif
  74 #  else
  75 #include <sys/socket.h>
  76 #include <sys/ioctl.h>
  77 #include <sys/select.h>
  78
  79 #define close(a) soclose(a)
  80 #define select(a,b,c,d,e) bsdselect(a,b,c,d,e)
  81 int _System bsdselect(int,
  82                       struct fd_set *,
  83                       struct fd_set *,
  84                       struct fd_set *,
  85                       struct timeval *);
  86 int _System soclose(int);
  87 #  endif
  88 #endif
  89 #include <stdio.h>
  90 #include <stdlib.h>
  91 #include <stddef.h>
  92 #include <ctype.h>
  93 #ifdef sun
  94 #  include <sys/filio.h>
  95 #endif
  96 #ifdef sgi
  97 #  include <bstring.h>
  98 #endif
  99 #include <signal.h>
 100
 101 #ifndef SOCKLEN_T
 102
 103 #ifdef VMS
 104 #  define SOCKLEN_T unsigned int
 105 #else
 106 #  ifdef __GLIBC__
 107 #    if __GLIBC__ == 2
 108 #      define SOCKLEN_T socklen_t
 109 #    endif
 110 #  else
 111 #    define SOCKLEN_T int
 112 #  endif
 113 #endif
 114
 115 #endif /* SOCKLEN_T */
 116
 117 /*
 118  * MSW defines this, Unices don't.
 119  */
 120 #ifndef INVALID_SOCKET
 121 #define INVALID_SOCKET -1
 122 #endif
 123
 124 /* UnixWare reportedly needs this for FIONBIO definition */
 125 #ifdef __UNIXWARE__
 126 #include <sys/filio.h>
 127 #endif
 128
 129 /*
 130  * INADDR_BROADCAST is identical to INADDR_NONE which is not defined
 131  * on all systems. INADDR_BROADCAST should be fine to indicate an error.
 132  */
 133 #ifndef INADDR_NONE
 134 #define INADDR_NONE INADDR_BROADCAST
 135 #endif
 136
 137 #define MASK_SIGNAL()                       \
 138 {                                           \
 139   void (*old_handler)(int);                 \
 140                                             \
 141   old_handler = signal(SIGPIPE, SIG_IGN);
 142
 143 #define UNMASK_SIGNAL()                     \
 144   signal(SIGPIPE, old_handler);             \
 145 }
 146
 147
 148 #ifndef __GSOCKET_STANDALONE__
 149 #  include "wx/unix/gsockunx.h"
 150 #  include "wx/gsocket.h"
 151 #else
 152 #  include "gsockunx.h"
 153 #  include "gsocket.h"
 154 #endif /* __GSOCKET_STANDALONE__ */
 155
 156 /* debugging helpers */
 157 #ifdef __GSOCKET_DEBUG__
 158 #  define GSocket_Debug(args) printf args
 159 #else
 160 #  define GSocket_Debug(args)
 161 #endif /* __GSOCKET_DEBUG__ */
 162
 163 /* Table of GUI-related functions. We must call them indirectly because
 164  * of wxBase and GUI separation: */
 165
 166 static struct GSocketGUIFunctionsTable *gs_gui_functions;
 167
 168 #define USE_GUI() (gs_gui_functions != NULL)
 169
 170 /* Define macros to simplify indirection: */
 171 #define _GSocket_GUI_Init() \
 172     if (gs_gui_functions) gs_gui_functions->GUI_Init()
 173 #define _GSocket_GUI_Cleanup() \
 174     if (gs_gui_functions) gs_gui_functions->GUI_Cleanup()
 175 #define _GSocket_GUI_Init_Socket(socket) \
 176     (gs_gui_functions ? gs_gui_functions->GUI_Init_Socket(socket) : 1)
 177 #define _GSocket_GUI_Destroy_Socket(socket) \
 178     if (gs_gui_functions) gs_gui_functions->GUI_Destroy_Socket(socket)
 179 #define _GSocket_Enable_Events(socket) \
 180     if (gs_gui_functions) gs_gui_functions->Enable_Events(socket)
 181 #define _GSocket_Disable_Events(socket) \
 182     if (gs_gui_functions) gs_gui_functions->Disable_Events(socket)
 183 #define _GSocket_Install_Callback(socket, event) \
 184     if (gs_gui_functions) gs_gui_functions->Install_Callback(socket, event)
 185 #define _GSocket_Uninstall_Callback(socket, event) \
 186     if (gs_gui_functions) gs_gui_functions->Uninstall_Callback(socket, event)
 187
 188 static struct GSocketBaseFunctionsTable gs_base_functions =
 189 {
 190     _GSocket_Detected_Read,
 191     _GSocket_Detected_Write
 192 };
 193
 194 /* Global initialisers */
 195
 196 void GSocket_SetGUIFunctions(struct GSocketGUIFunctionsTable *guifunc)
 197 {
 198   gs_gui_functions = guifunc;
 199 }
 200
 201 int GSocket_Init(void)
 202 {
 203   if (gs_gui_functions)
 204   {
 205       if ( !gs_gui_functions->GUI_Init() )
 206         return 0;
 207   }
 208   return 1;
 209 }
 210
 211 void GSocket_Cleanup(void)
 212 {
 213   if (gs_gui_functions)
 214   {
 215       gs_gui_functions->GUI_Cleanup();
 216   }
 217 }
 218
 219 /* Constructors / Destructors for GSocket */
 220
 221 GSocket *GSocket_new(void)
 222 {
 223   int i, success;
 224   GSocket *socket;
 225
 226   socket = (GSocket *)malloc(sizeof(GSocket));
 227
 228   if (socket == NULL)
 229     return NULL;
 230
 231   socket->m_fd                  = INVALID_SOCKET;
 232   for (i=0;i<GSOCK_MAX_EVENT;i++)
 233   {
 234     socket->m_cbacks[i]         = NULL;
 235   }
 236   socket->m_detected            = 0;
 237   socket->m_local               = NULL;
 238   socket->m_peer                = NULL;
 239   socket->m_error               = GSOCK_NOERROR;
 240   socket->m_server              = FALSE;
 241   socket->m_stream              = TRUE;
 242   socket->m_gui_dependent       = NULL;
 243   socket->m_non_blocking        = FALSE;
 244   socket->m_timeout             = 10*60*1000;
 245                                 /* 10 minutes * 60 sec * 1000 millisec */
 246   socket->m_establishing        = FALSE;
 247
 248   socket->m_functions           = &gs_base_functions;
 249
 250   /* Per-socket GUI-specific initialization */
 251   success = _GSocket_GUI_Init_Socket(socket);
 252   if (!success)
 253   {
 254     free(socket);
 255     return NULL;
 256   }
 257
 258   return socket;
 259 }
 260
 261 void GSocket_close(GSocket *socket)
 262 {
 263     _GSocket_Disable_Events(socket);
 264     /* gsockosx.c calls CFSocketInvalidate which closes the socket for us */
 265 #if !(defined(__DARWIN__) && (defined(__WXMAC__) || defined(__WXCOCOA__)))
 266     close(socket->m_fd);
 267 #endif
 268     socket->m_fd = INVALID_SOCKET;
 269 }
 270
 271 void GSocket_destroy(GSocket *socket)
 272 {
 273   assert(socket != NULL);
 274
 275   /* Check that the socket is really shutdowned */
 276   if (socket->m_fd != INVALID_SOCKET)
 277     GSocket_Shutdown(socket);
 278
 279   /* Per-socket GUI-specific cleanup */
 280   _GSocket_GUI_Destroy_Socket(socket);
 281
 282   /* Destroy private addresses */
 283   if (socket->m_local)
 284     GAddress_destroy(socket->m_local);
 285
 286   if (socket->m_peer)
 287     GAddress_destroy(socket->m_peer);
 288
 289   /* Destroy the socket itself */
 290   free(socket);
 291 }
 292
 293 /* GSocket_Shutdown:
 294  *  Disallow further read/write operations on this socket, close
 295  *  the fd and disable all callbacks.
 296  */
 297 void GSocket_Shutdown(GSocket *socket)
 298 {
 299   int evt;
 300
 301   assert(socket != NULL);
 302
 303   /* If socket has been created, shutdown it */
 304   if (socket->m_fd != INVALID_SOCKET)
 305   {
 306     shutdown(socket->m_fd, 2);
 307     GSocket_close(socket);
 308   }
 309
 310   /* Disable GUI callbacks */
 311   for (evt = 0; evt < GSOCK_MAX_EVENT; evt++)
 312     socket->m_cbacks[evt] = NULL;
 313
 314   socket->m_detected = GSOCK_LOST_FLAG;
 315 }
 316
 317 /* Address handling */
 318
 319 /* GSocket_SetLocal:
 320  * GSocket_GetLocal:
 321  * GSocket_SetPeer:
 322  * GSocket_GetPeer:
 323  *  Set or get the local or peer address for this socket. The 'set'
 324  *  functions return GSOCK_NOERROR on success, an error code otherwise.
 325  *  The 'get' functions return a pointer to a GAddress object on success,
 326  *  or NULL otherwise, in which case they set the error code of the
 327  *  corresponding GSocket.
 328  *
 329  *  Error codes:
 330  *    GSOCK_INVSOCK - the socket is not valid.
 331  *    GSOCK_INVADDR - the address is not valid.
 332  */
 333 GSocketError GSocket_SetLocal(GSocket *socket, GAddress *address)
 334 {
 335   assert(socket != NULL);
 336
 337   /* the socket must be initialized, or it must be a server */
 338   if ((socket->m_fd != INVALID_SOCKET && !socket->m_server))
 339   {
 340     socket->m_error = GSOCK_INVSOCK;
 341     return GSOCK_INVSOCK;
 342   }
 343
 344   /* check address */
 345   if (address == NULL || address->m_family == GSOCK_NOFAMILY)
 346   {
 347     socket->m_error = GSOCK_INVADDR;
 348     return GSOCK_INVADDR;
 349   }
 350
 351   if (socket->m_local)
 352     GAddress_destroy(socket->m_local);
 353
 354   socket->m_local = GAddress_copy(address);
 355
 356   return GSOCK_NOERROR;
 357 }
 358
 359 GSocketError GSocket_SetPeer(GSocket *socket, GAddress *address)
 360 {
 361   assert(socket != NULL);
 362
 363   /* check address */
 364   if (address == NULL || address->m_family == GSOCK_NOFAMILY)
 365   {
 366     socket->m_error = GSOCK_INVADDR;
 367     return GSOCK_INVADDR;
 368   }
 369
 370   if (socket->m_peer)
 371     GAddress_destroy(socket->m_peer);
 372
 373   socket->m_peer = GAddress_copy(address);
 374
 375   return GSOCK_NOERROR;
 376 }
 377
 378 GAddress *GSocket_GetLocal(GSocket *socket)
 379 {
 380   GAddress *address;
 381   struct sockaddr addr;
 382   SOCKLEN_T size = sizeof(addr);
 383   GSocketError err;
 384
 385   assert(socket != NULL);
 386
 387   /* try to get it from the m_local var first */
 388   if (socket->m_local)
 389     return GAddress_copy(socket->m_local);
 390
 391   /* else, if the socket is initialized, try getsockname */
 392   if (socket->m_fd == INVALID_SOCKET)
 393   {
 394     socket->m_error = GSOCK_INVSOCK;
 395     return NULL;
 396   }
 397
 398   if (getsockname(socket->m_fd, &addr, (SOCKLEN_T *) &size) < 0)
 399   {
 400     socket->m_error = GSOCK_IOERR;
 401     return NULL;
 402   }
 403
 404   /* got a valid address from getsockname, create a GAddress object */
 405   address = GAddress_new();
 406   if (address == NULL)
 407   {
 408     socket->m_error = GSOCK_MEMERR;
 409     return NULL;
 410   }
 411
 412   err = _GAddress_translate_from(address, &addr, size);
 413   if (err != GSOCK_NOERROR)
 414   {
 415     GAddress_destroy(address);
 416     socket->m_error = err;
 417     return NULL;
 418   }
 419
 420   return address;
 421 }
 422
 423 GAddress *GSocket_GetPeer(GSocket *socket)
 424 {
 425   assert(socket != NULL);
 426
 427   /* try to get it from the m_peer var */
 428   if (socket->m_peer)
 429     return GAddress_copy(socket->m_peer);
 430
 431   return NULL;
 432 }
 433
 434 /* Server specific parts */
 435
 436 /* GSocket_SetServer:
 437  *  Sets up this socket as a server. The local address must have been
 438  *  set with GSocket_SetLocal() before GSocket_SetServer() is called.
 439  *  Returns GSOCK_NOERROR on success, one of the following otherwise:
 440  *
 441  *  Error codes:
 442  *    GSOCK_INVSOCK - the socket is in use.
 443  *    GSOCK_INVADDR - the local address has not been set.
 444  *    GSOCK_IOERR   - low-level error.
 445  */
 446 GSocketError GSocket_SetServer(GSocket *sck)
 447 {
 448   int arg = 1;
 449
 450   assert(sck != NULL);
 451
 452   /* must not be in use */
 453   if (sck->m_fd != INVALID_SOCKET)
 454   {
 455     sck->m_error = GSOCK_INVSOCK;
 456     return GSOCK_INVSOCK;
 457   }
 458
 459   /* the local addr must have been set */
 460   if (!sck->m_local)
 461   {
 462     sck->m_error = GSOCK_INVADDR;
 463     return GSOCK_INVADDR;
 464   }
 465
 466   /* Initialize all fields */
 467   sck->m_stream   = TRUE;
 468   sck->m_server   = TRUE;
 469   sck->m_oriented = TRUE;
 470
 471   /* Create the socket */
 472   sck->m_fd = socket(sck->m_local->m_realfamily, SOCK_STREAM, 0);
 473
 474   if (sck->m_fd == INVALID_SOCKET)
 475   {
 476     sck->m_error = GSOCK_IOERR;
 477     return GSOCK_IOERR;
 478   }
 479 #if defined(__EMX__) || defined(__VISAGECPP__)
 480   ioctl(sck->m_fd, FIONBIO, (char*)&arg, sizeof(arg));
 481 #else
 482   ioctl(sck->m_fd, FIONBIO, &arg);
 483 #endif
 484   _GSocket_Enable_Events(sck);
 485
 486   /* allow a socket to re-bind if the socket is in the TIME_WAIT
 487      state after being previously closed.
 488    */
 489   if (sck->m_reusable)
 490     setsockopt(socket->m_fd, SOL_SOCKET, SO_REUSEADDR, (const char*)&arg, sizeof(u_long));
 491
 492   /* Bind to the local address,
 493    * retrieve the actual address bound,
 494    * and listen up to 5 connections.
 495    */
 496   if ((bind(sck->m_fd, sck->m_local->m_addr, sck->m_local->m_len) != 0) ||
 497       (getsockname(sck->m_fd,
 498                    sck->m_local->m_addr,
 499                    (SOCKLEN_T *) &sck->m_local->m_len) != 0) ||
 500       (listen(sck->m_fd, 5) != 0))
 501   {
 502     GSocket_close(sck);
 503     sck->m_error = GSOCK_IOERR;
 504     return GSOCK_IOERR;
 505   }
 506
 507   return GSOCK_NOERROR;
 508 }
 509
 510 /* GSocket_WaitConnection:
 511  *  Waits for an incoming client connection. Returns a pointer to
 512  *  a GSocket object, or NULL if there was an error, in which case
 513  *  the last error field will be updated for the calling GSocket.
 514  *
 515  *  Error codes (set in the calling GSocket)
 516  *    GSOCK_INVSOCK    - the socket is not valid or not a server.
 517  *    GSOCK_TIMEDOUT   - timeout, no incoming connections.
 518  *    GSOCK_WOULDBLOCK - the call would block and the socket is nonblocking.
 519  *    GSOCK_MEMERR     - couldn't allocate memory.
 520  *    GSOCK_IOERR      - low-level error.
 521  */
 522 GSocket *GSocket_WaitConnection(GSocket *socket)
 523 {
 524   struct sockaddr from;
 525   SOCKLEN_T fromlen = sizeof(from);
 526   GSocket *connection;
 527   GSocketError err;
 528   int arg = 1;
 529
 530   assert(socket != NULL);
 531
 532   /* Reenable CONNECTION events */
 533   _GSocket_Enable(socket, GSOCK_CONNECTION);
 534
 535   /* If the socket has already been created, we exit immediately */
 536   if (socket->m_fd == INVALID_SOCKET || !socket->m_server)
 537   {
 538     socket->m_error = GSOCK_INVSOCK;
 539     return NULL;
 540   }
 541
 542   /* Create a GSocket object for the new connection */
 543   connection = GSocket_new();
 544
 545   if (!connection)
 546   {
 547     socket->m_error = GSOCK_MEMERR;
 548     return NULL;
 549   }
 550
 551   /* Wait for a connection (with timeout) */
 552   if (_GSocket_Input_Timeout(socket) == GSOCK_TIMEDOUT)
 553   {
 554     GSocket_destroy(connection);
 555     /* socket->m_error set by _GSocket_Input_Timeout */
 556     return NULL;
 557   }
 558
 559   connection->m_fd = accept(socket->m_fd, &from, (SOCKLEN_T *) &fromlen);
 560
 561   if (connection->m_fd == INVALID_SOCKET)
 562   {
 563     if (errno == EWOULDBLOCK)
 564       socket->m_error = GSOCK_WOULDBLOCK;
 565     else
 566       socket->m_error = GSOCK_IOERR;
 567
 568     GSocket_destroy(connection);
 569     return NULL;
 570   }
 571
 572   /* Initialize all fields */
 573   connection->m_server   = FALSE;
 574   connection->m_stream   = TRUE;
 575   connection->m_oriented = TRUE;
 576
 577   /* Setup the peer address field */
 578   connection->m_peer = GAddress_new();
 579   if (!connection->m_peer)
 580   {
 581     GSocket_destroy(connection);
 582     socket->m_error = GSOCK_MEMERR;
 583     return NULL;
 584   }
 585   err = _GAddress_translate_from(connection->m_peer, &from, fromlen);
 586   if (err != GSOCK_NOERROR)
 587   {
 588     GAddress_destroy(connection->m_peer);
 589     GSocket_destroy(connection);
 590     socket->m_error = err;
 591     return NULL;
 592   }
 593 #if defined(__EMX__) || defined(__VISAGECPP__)
 594   ioctl(connection->m_fd, FIONBIO, (char*)&arg, sizeof(arg));
 595 #else
 596   ioctl(connection->m_fd, FIONBIO, &arg);
 597 #endif
 598   _GSocket_Enable_Events(connection);
 599
 600   return connection;
 601 }
 602
 603 int GSocket_SetReusable(GSocket *socket)
 604 {
 605     /* socket must not be null, and must not be in use/already bound */
 606     if (NULL != socket && socket->m_fd == INVALID_SOCKET) {
 607         socket->m_reusable = TRUE;
 608         return TRUE;
 609     }
 610     return FALSE;
 611 }
 612
 613 /* Client specific parts */
 614
 615 /* GSocket_Connect:
 616  *  For stream (connection oriented) sockets, GSocket_Connect() tries
 617  *  to establish a client connection to a server using the peer address
 618  *  as established with GSocket_SetPeer(). Returns GSOCK_NOERROR if the
 619  *  connection has been succesfully established, or one of the error
 620  *  codes listed below. Note that for nonblocking sockets, a return
 621  *  value of GSOCK_WOULDBLOCK doesn't mean a failure. The connection
 622  *  request can be completed later; you should use GSocket_Select()
 623  *  to poll for GSOCK_CONNECTION | GSOCK_LOST, or wait for the
 624  *  corresponding asynchronous events.
 625  *
 626  *  For datagram (non connection oriented) sockets, GSocket_Connect()
 627  *  just sets the peer address established with GSocket_SetPeer() as
 628  *  default destination.
 629  *
 630  *  Error codes:
 631  *    GSOCK_INVSOCK    - the socket is in use or not valid.
 632  *    GSOCK_INVADDR    - the peer address has not been established.
 633  *    GSOCK_TIMEDOUT   - timeout, the connection failed.
 634  *    GSOCK_WOULDBLOCK - connection in progress (nonblocking sockets only)
 635  *    GSOCK_MEMERR     - couldn't allocate memory.
 636  *    GSOCK_IOERR      - low-level error.
 637  */
 638 GSocketError GSocket_Connect(GSocket *sck, GSocketStream stream)
 639 {
 640   int err, ret;
 641   int arg = 1;
 642
 643   assert(sck != NULL);
 644
 645   /* Enable CONNECTION events (needed for nonblocking connections) */
 646   _GSocket_Enable(sck, GSOCK_CONNECTION);
 647
 648   if (sck->m_fd != INVALID_SOCKET)
 649   {
 650     sck->m_error = GSOCK_INVSOCK;
 651     return GSOCK_INVSOCK;
 652   }
 653
 654   if (!sck->m_peer)
 655   {
 656     sck->m_error = GSOCK_INVADDR;
 657     return GSOCK_INVADDR;
 658   }
 659
 660   /* Streamed or dgram socket? */
 661   sck->m_stream   = (stream == GSOCK_STREAMED);
 662   sck->m_oriented = TRUE;
 663   sck->m_server   = FALSE;
 664   sck->m_establishing = FALSE;
 665
 666   /* Create the socket */
 667   sck->m_fd = socket(sck->m_peer->m_realfamily,
 668                      sck->m_stream? SOCK_STREAM : SOCK_DGRAM, 0);
 669
 670   if (sck->m_fd == INVALID_SOCKET)
 671   {
 672     sck->m_error = GSOCK_IOERR;
 673     return GSOCK_IOERR;
 674   }
 675 #if defined(__EMX__) || defined(__VISAGECPP__)
 676   ioctl(sck->m_fd, FIONBIO, (char*)&arg, sizeof(arg));
 677 #else
 678   ioctl(sck->m_fd, FIONBIO, &arg);
 679 #endif
 680   _GSocket_Enable_Events(sck);
 681
 682   /* Connect it to the peer address, with a timeout (see below) */
 683   ret = connect(sck->m_fd, sck->m_peer->m_addr, sck->m_peer->m_len);
 684
 685   if (ret == -1)
 686   {
 687     err = errno;
 688
 689     /* If connect failed with EINPROGRESS and the GSocket object
 690      * is in blocking mode, we select() for the specified timeout
 691      * checking for writability to see if the connection request
 692      * completes.
 693      */
 694     if ((err == EINPROGRESS) && (!sck->m_non_blocking))
 695     {
 696       if (_GSocket_Output_Timeout(sck) == GSOCK_TIMEDOUT)
 697       {
 698         GSocket_close(sck);
 699         /* sck->m_error is set in _GSocket_Output_Timeout */
 700         return GSOCK_TIMEDOUT;
 701       }
 702       else
 703       {
 704         int error;
 705         SOCKLEN_T len = sizeof(error);
 706
 707         getsockopt(sck->m_fd, SOL_SOCKET, SO_ERROR, (void*) &error, &len);
 708
 709         if (!error)
 710           return GSOCK_NOERROR;
 711       }
 712     }
 713
 714     /* If connect failed with EINPROGRESS and the GSocket object
 715      * is set to nonblocking, we set m_error to GSOCK_WOULDBLOCK
 716      * (and return GSOCK_WOULDBLOCK) but we don't close the socket;
 717      * this way if the connection completes, a GSOCK_CONNECTION
 718      * event will be generated, if enabled.
 719      */
 720     if ((err == EINPROGRESS) && (sck->m_non_blocking))
 721     {
 722       sck->m_establishing = TRUE;
 723       sck->m_error = GSOCK_WOULDBLOCK;
 724       return GSOCK_WOULDBLOCK;
 725     }
 726
 727     /* If connect failed with an error other than EINPROGRESS,
 728      * then the call to GSocket_Connect has failed.
 729      */
 730     GSocket_close(sck);
 731     sck->m_error = GSOCK_IOERR;
 732     return GSOCK_IOERR;
 733   }
 734
 735   return GSOCK_NOERROR;
 736 }
 737
 738 /* Datagram sockets */
 739
 740 /* GSocket_SetNonOriented:
 741  *  Sets up this socket as a non-connection oriented (datagram) socket.
 742  *  Before using this function, the local address must have been set
 743  *  with GSocket_SetLocal(), or the call will fail. Returns GSOCK_NOERROR
 744  *  on success, or one of the following otherwise.
 745  *
 746  *  Error codes:
 747  *    GSOCK_INVSOCK - the socket is in use.
 748  *    GSOCK_INVADDR - the local address has not been set.
 749  *    GSOCK_IOERR   - low-level error.
 750  */
 751 GSocketError GSocket_SetNonOriented(GSocket *sck)
 752 {
 753   int arg = 1;
 754
 755   assert(sck != NULL);
 756
 757   if (sck->m_fd != INVALID_SOCKET)
 758   {
 759     sck->m_error = GSOCK_INVSOCK;
 760     return GSOCK_INVSOCK;
 761   }
 762
 763   if (!sck->m_local)
 764   {
 765     sck->m_error = GSOCK_INVADDR;
 766     return GSOCK_INVADDR;
 767   }
 768
 769   /* Initialize all fields */
 770   sck->m_stream   = FALSE;
 771   sck->m_server   = FALSE;
 772   sck->m_oriented = FALSE;
 773
 774   /* Create the socket */
 775   sck->m_fd = socket(sck->m_local->m_realfamily, SOCK_DGRAM, 0);
 776
 777   if (sck->m_fd == INVALID_SOCKET)
 778   {
 779     sck->m_error = GSOCK_IOERR;
 780     return GSOCK_IOERR;
 781   }
 782 #if defined(__EMX__) || defined(__VISAGECPP__)
 783   ioctl(sck->m_fd, FIONBIO, (char*)&arg, sizeof(arg));
 784 #else
 785   ioctl(sck->m_fd, FIONBIO, &arg);
 786 #endif
 787   _GSocket_Enable_Events(sck);
 788
 789   /* Bind to the local address,
 790    * and retrieve the actual address bound.
 791    */
 792   if ((bind(sck->m_fd, sck->m_local->m_addr, sck->m_local->m_len) != 0) ||
 793       (getsockname(sck->m_fd,
 794                    sck->m_local->m_addr,
 795                    (SOCKLEN_T *) &sck->m_local->m_len) != 0))
 796   {
 797     GSocket_close(sck);
 798     sck->m_error = GSOCK_IOERR;
 799     return GSOCK_IOERR;
 800   }
 801
 802   return GSOCK_NOERROR;
 803 }
 804
 805 /* Generic IO */
 806
 807 /* Like recv(), send(), ... */
 808 int GSocket_Read(GSocket *socket, char *buffer, int size)
 809 {
 810   int ret;
 811
 812   assert(socket != NULL);
 813
 814   if (socket->m_fd == INVALID_SOCKET || socket->m_server)
 815   {
 816     socket->m_error = GSOCK_INVSOCK;
 817     return -1;
 818   }
 819
 820   /* Disable events during query of socket status */
 821   _GSocket_Disable(socket, GSOCK_INPUT);
 822
 823   /* If the socket is blocking, wait for data (with a timeout) */
 824   if (_GSocket_Input_Timeout(socket) == GSOCK_TIMEDOUT)
 825     /* We no longer return here immediately, otherwise socket events would not be re-enabled! */
 826     ret = -1;
 827   else {
 828     /* Read the data */
 829     if (socket->m_stream)
 830       ret = _GSocket_Recv_Stream(socket, buffer, size);
 831     else
 832       ret = _GSocket_Recv_Dgram(socket, buffer, size);
 833   }
 834
 835   if (ret == -1)
 836   {
 837     if (errno == EWOULDBLOCK)
 838       socket->m_error = GSOCK_WOULDBLOCK;
 839     else
 840       socket->m_error = GSOCK_IOERR;
 841   }
 842
 843   /* Enable events again now that we are done processing */
 844   _GSocket_Enable(socket, GSOCK_INPUT);
 845
 846   return ret;
 847 }
 848
 849 int GSocket_Write(GSocket *socket, const char *buffer, int size)
 850 {
 851   int ret;
 852
 853   assert(socket != NULL);
 854
 855   GSocket_Debug(( "GSocket_Write #1, size %d\n", size ));
 856
 857   if (socket->m_fd == INVALID_SOCKET || socket->m_server)
 858   {
 859     socket->m_error = GSOCK_INVSOCK;
 860     return -1;
 861   }
 862
 863   GSocket_Debug(( "GSocket_Write #2, size %d\n", size ));
 864
 865   /* If the socket is blocking, wait for writability (with a timeout) */
 866   if (_GSocket_Output_Timeout(socket) == GSOCK_TIMEDOUT)
 867     return -1;
 868
 869   GSocket_Debug(( "GSocket_Write #3, size %d\n", size ));
 870
 871   /* Write the data */
 872   if (socket->m_stream)
 873     ret = _GSocket_Send_Stream(socket, buffer, size);
 874   else
 875     ret = _GSocket_Send_Dgram(socket, buffer, size);
 876
 877   GSocket_Debug(( "GSocket_Write #4, size %d\n", size ));
 878
 879   if (ret == -1)
 880   {
 881     if (errno == EWOULDBLOCK)
 882     {
 883       socket->m_error = GSOCK_WOULDBLOCK;
 884       GSocket_Debug(( "GSocket_Write error WOULDBLOCK\n" ));
 885     }
 886     else
 887     {
 888       socket->m_error = GSOCK_IOERR;
 889       GSocket_Debug(( "GSocket_Write error IOERR\n" ));
 890     }
 891
 892     /* Only reenable OUTPUT events after an error (just like WSAAsyncSelect
 893      * in MSW). Once the first OUTPUT event is received, users can assume
 894      * that the socket is writable until a read operation fails. Only then
 895      * will further OUTPUT events be posted.
 896      */
 897     _GSocket_Enable(socket, GSOCK_OUTPUT);
 898     return -1;
 899   }
 900
 901   GSocket_Debug(( "GSocket_Write #5, size %d ret %d\n", size, ret ));
 902
 903   return ret;
 904 }
 905
 906 /* GSocket_Select:
 907  *  Polls the socket to determine its status. This function will
 908  *  check for the events specified in the 'flags' parameter, and
 909  *  it will return a mask indicating which operations can be
 910  *  performed. This function won't block, regardless of the
 911  *  mode (blocking | nonblocking) of the socket.
 912  */
 913 GSocketEventFlags GSocket_Select(GSocket *socket, GSocketEventFlags flags)
 914 {
 915   if (!USE_GUI())
 916   {
 917
 918     GSocketEventFlags result = 0;
 919     fd_set readfds;
 920     fd_set writefds;
 921     fd_set exceptfds;
 922     struct timeval tv;
 923
 924     assert(socket != NULL);
 925
 926     /* Do not use a static struct, Linux can garble it */
 927     tv.tv_sec = socket->m_timeout / 1000;
 928     tv.tv_usec = (socket->m_timeout % 1000) / 1000;
 929
 930     FD_ZERO(&readfds);
 931     FD_ZERO(&writefds);
 932     FD_ZERO(&exceptfds);
 933     FD_SET(socket->m_fd, &readfds);
 934     if (flags & GSOCK_OUTPUT_FLAG || flags & GSOCK_CONNECTION_FLAG)
 935       FD_SET(socket->m_fd, &writefds);
 936     FD_SET(socket->m_fd, &exceptfds);
 937
 938     /* Check 'sticky' CONNECTION flag first */
 939     result |= (GSOCK_CONNECTION_FLAG & socket->m_detected);
 940
 941     /* If we have already detected a LOST event, then don't try
 942      * to do any further processing.
 943      */
 944     if ((socket->m_detected & GSOCK_LOST_FLAG) != 0)
 945     {
 946       socket->m_establishing = FALSE;
 947
 948       return (GSOCK_LOST_FLAG & flags);
 949     }
 950
 951     /* Try select now */
 952     if (select(socket->m_fd + 1, &readfds, &writefds, &exceptfds, &tv) <= 0)
 953     {
 954       /* What to do here? */
 955       return (result & flags);
 956     }
 957
 958     /* Check for readability */
 959     if (FD_ISSET(socket->m_fd, &readfds))
 960     {
 961       char c;
 962
 963       if (recv(socket->m_fd, &c, 1, MSG_PEEK) > 0)
 964       {
 965         result |= GSOCK_INPUT_FLAG;
 966       }
 967       else
 968       {
 969         if (socket->m_server && socket->m_stream)
 970         {
 971           result |= GSOCK_CONNECTION_FLAG;
 972           socket->m_detected |= GSOCK_CONNECTION_FLAG;
 973         }
 974         else
 975         {
 976           socket->m_detected = GSOCK_LOST_FLAG;
 977           socket->m_establishing = FALSE;
 978
 979           /* LOST event: Abort any further processing */
 980           return (GSOCK_LOST_FLAG & flags);
 981         }
 982       }
 983     }
 984
 985     /* Check for writability */
 986     if (FD_ISSET(socket->m_fd, &writefds))
 987     {
 988       if (socket->m_establishing && !socket->m_server)
 989       {
 990         int error;
 991         SOCKLEN_T len = sizeof(error);
 992
 993         socket->m_establishing = FALSE;
 994
 995         getsockopt(socket->m_fd, SOL_SOCKET, SO_ERROR, (void*)&error, &len);
 996
 997         if (error)
 998         {
 999           socket->m_detected = GSOCK_LOST_FLAG;
1000
1001           /* LOST event: Abort any further processing */
1002           return (GSOCK_LOST_FLAG & flags);
1003         }
1004         else
1005         {
1006           result |= GSOCK_CONNECTION_FLAG;
1007           socket->m_detected |= GSOCK_CONNECTION_FLAG;
1008         }
1009       }
1010       else
1011       {
1012         result |= GSOCK_OUTPUT_FLAG;
1013       }
1014     }
1015
1016     /* Check for exceptions and errors (is this useful in Unices?) */
1017     if (FD_ISSET(socket->m_fd, &exceptfds))
1018     {
1019       socket->m_establishing = FALSE;
1020       socket->m_detected = GSOCK_LOST_FLAG;
1021
1022       /* LOST event: Abort any further processing */
1023       return (GSOCK_LOST_FLAG & flags);
1024     }
1025
1026     return (result & flags);
1027
1028   }
1029   else
1030   {
1031
1032     assert(socket != NULL);
1033     return flags & socket->m_detected;
1034
1035   }
1036 }
1037
1038 /* Flags */
1039
1040 /* GSocket_SetNonBlocking:
1041  *  Sets the socket to non-blocking mode. All IO calls will return
1042  *  immediately.
1043  */
1044 void GSocket_SetNonBlocking(GSocket *socket, int non_block)
1045 {
1046   assert(socket != NULL);
1047
1048   GSocket_Debug( ("GSocket_SetNonBlocking: %d\n", (int)non_block) );
1049
1050   socket->m_non_blocking = non_block;
1051 }
1052
1053 /* GSocket_SetTimeout:
1054  *  Sets the timeout for blocking calls. Time is expressed in
1055  *  milliseconds.
1056  */
1057 void GSocket_SetTimeout(GSocket *socket, unsigned long millisec)
1058 {
1059   assert(socket != NULL);
1060
1061   socket->m_timeout = millisec;
1062 }
1063
1064 /* GSocket_GetError:
1065  *  Returns the last error occured for this socket. Note that successful
1066  *  operations do not clear this back to GSOCK_NOERROR, so use it only
1067  *  after an error.
1068  */
1069 GSocketError GSocket_GetError(GSocket *socket)
1070 {
1071   assert(socket != NULL);
1072
1073   return socket->m_error;
1074 }
1075
1076 /* Callbacks */
1077
1078 /* GSOCK_INPUT:
1079  *   There is data to be read in the input buffer. If, after a read
1080  *   operation, there is still data available, the callback function will
1081  *   be called again.
1082  * GSOCK_OUTPUT:
1083  *   The socket is available for writing. That is, the next write call
1084  *   won't block. This event is generated only once, when the connection is
1085  *   first established, and then only if a call failed with GSOCK_WOULDBLOCK,
1086  *   when the output buffer empties again. This means that the app should
1087  *   assume that it can write since the first OUTPUT event, and no more
1088  *   OUTPUT events will be generated unless an error occurs.
1089  * GSOCK_CONNECTION:
1090  *   Connection succesfully established, for client sockets, or incoming
1091  *   client connection, for server sockets. Wait for this event (also watch
1092  *   out for GSOCK_LOST) after you issue a nonblocking GSocket_Connect() call.
1093  * GSOCK_LOST:
1094  *   The connection is lost (or a connection request failed); this could
1095  *   be due to a failure, or due to the peer closing it gracefully.
1096  */
1097
1098 /* GSocket_SetCallback:
1099  *  Enables the callbacks specified by 'flags'. Note that 'flags'
1100  *  may be a combination of flags OR'ed toghether, so the same
1101  *  callback function can be made to accept different events.
1102  *  The callback function must have the following prototype:
1103  *
1104  *  void function(GSocket *socket, GSocketEvent event, char *cdata)
1105  */
1106 void GSocket_SetCallback(GSocket *socket, GSocketEventFlags flags,
1107                          GSocketCallback callback, char *cdata)
1108 {
1109   int count;
1110
1111   assert(socket != NULL);
1112
1113   for (count = 0; count < GSOCK_MAX_EVENT; count++)
1114   {
1115     if ((flags & (1 << count)) != 0)
1116     {
1117       socket->m_cbacks[count] = callback;
1118       socket->m_data[count] = cdata;
1119     }
1120   }
1121 }
1122
1123 /* GSocket_UnsetCallback:
1124  *  Disables all callbacks specified by 'flags', which may be a
1125  *  combination of flags OR'ed toghether.
1126  */
1127 void GSocket_UnsetCallback(GSocket *socket, GSocketEventFlags flags)
1128 {
1129   int count;
1130
1131   assert(socket != NULL);
1132
1133   for (count = 0; count < GSOCK_MAX_EVENT; count++)
1134   {
1135     if ((flags & (1 << count)) != 0)
1136     {
1137       socket->m_cbacks[count] = NULL;
1138       socket->m_data[count] = NULL;
1139     }
1140   }
1141 }
1142
1143 GSocketError GSocket_GetSockOpt(GSocket *socket, int level, int optname,
1144                                 void *optval, int *optlen)
1145 {
1146     if (getsockopt(socket->m_fd, level, optname, optval, optlen) == 0)
1147     {
1148         return GSOCK_NOERROR;
1149     }
1150     return GSOCK_OPTERR;
1151 }
1152
1153 GSocketError GSocket_SetSockOpt(GSocket *socket, int level, int optname,
1154                                 const void *optval, int optlen)
1155 {
1156     if (setsockopt(socket->m_fd, level, optname, optval, optlen) == 0)
1157     {
1158         return GSOCK_NOERROR;
1159     }
1160     return GSOCK_OPTERR;
1161 }
1162
1163 void GSocket_Streamed(GSocket *socket)
1164 {
1165     socket->m_stream = TRUE;
1166 }
1167
1168 void GSocket_Unstreamed(GSocket *socket)
1169 {
1170     socket->m_stream = FALSE;
1171 }
1172
1173 #define CALL_CALLBACK(socket, event) {                                  \
1174   _GSocket_Disable(socket, event);                                      \
1175   if (socket->m_cbacks[event])                                          \
1176     socket->m_cbacks[event](socket, event, socket->m_data[event]);      \
1177 }
1178
1179
1180 void _GSocket_Enable(GSocket *socket, GSocketEvent event)
1181 {
1182   socket->m_detected &= ~(1 << event);
1183   _GSocket_Install_Callback(socket, event);
1184 }
1185
1186 void _GSocket_Disable(GSocket *socket, GSocketEvent event)
1187 {
1188   socket->m_detected |= (1 << event);
1189   _GSocket_Uninstall_Callback(socket, event);
1190 }
1191
1192 /* _GSocket_Input_Timeout:
1193  *  For blocking sockets, wait until data is available or
1194  *  until timeout ellapses.
1195  */
1196 GSocketError _GSocket_Input_Timeout(GSocket *socket)
1197 {
1198   struct timeval tv;
1199   fd_set readfds;
1200   int ret;
1201
1202   /* Linux select() will overwrite the struct on return */
1203   tv.tv_sec  = (socket->m_timeout / 1000);
1204   tv.tv_usec = (socket->m_timeout % 1000) * 1000;
1205
1206   if (!socket->m_non_blocking)
1207   {
1208     FD_ZERO(&readfds);
1209     FD_SET(socket->m_fd, &readfds);
1210     ret = select(socket->m_fd + 1, &readfds, NULL, NULL, &tv);
1211     if (ret == 0)
1212     {
1213       GSocket_Debug(( "GSocket_Input_Timeout, select returned 0\n" ));
1214       socket->m_error = GSOCK_TIMEDOUT;
1215       return GSOCK_TIMEDOUT;
1216     }
1217     if (ret == -1)
1218     {
1219       GSocket_Debug(( "GSocket_Input_Timeout, select returned -1\n" ));
1220       if (errno == EBADF) { GSocket_Debug(( "Invalid file descriptor\n" )); }
1221       if (errno == EINTR) { GSocket_Debug(( "A non blocked signal was caught\n" )); }
1222       if (errno == EINVAL) { GSocket_Debug(( "The highest number descriptor is negative\n" )); }
1223       if (errno == ENOMEM) { GSocket_Debug(( "Not enough memory\n" )); }
1224       socket->m_error = GSOCK_TIMEDOUT;
1225       return GSOCK_TIMEDOUT;
1226     }
1227   }
1228   return GSOCK_NOERROR;
1229 }
1230
1231 /* _GSocket_Output_Timeout:
1232  *  For blocking sockets, wait until data can be sent without
1233  *  blocking or until timeout ellapses.
1234  */
1235 GSocketError _GSocket_Output_Timeout(GSocket *socket)
1236 {
1237   struct timeval tv;
1238   fd_set writefds;
1239   int ret;
1240
1241   /* Linux select() will overwrite the struct on return */
1242   tv.tv_sec  = (socket->m_timeout / 1000);
1243   tv.tv_usec = (socket->m_timeout % 1000) * 1000;
1244
1245   GSocket_Debug( ("m_non_blocking has: %d\n", (int)socket->m_non_blocking) );
1246
1247   if (!socket->m_non_blocking)
1248   {
1249     FD_ZERO(&writefds);
1250     FD_SET(socket->m_fd, &writefds);
1251     ret = select(socket->m_fd + 1, NULL, &writefds, NULL, &tv);
1252     if (ret == 0)
1253     {
1254       GSocket_Debug(( "GSocket_Output_Timeout, select returned 0\n" ));
1255       socket->m_error = GSOCK_TIMEDOUT;
1256       return GSOCK_TIMEDOUT;
1257     }
1258     if (ret == -1)
1259     {
1260       GSocket_Debug(( "GSocket_Output_Timeout, select returned -1\n" ));
1261       if (errno == EBADF) { GSocket_Debug(( "Invalid file descriptor\n" )); }
1262       if (errno == EINTR) { GSocket_Debug(( "A non blocked signal was caught\n" )); }
1263       if (errno == EINVAL) { GSocket_Debug(( "The highest number descriptor is negative\n" )); }
1264       if (errno == ENOMEM) { GSocket_Debug(( "Not enough memory\n" )); }
1265       socket->m_error = GSOCK_TIMEDOUT;
1266       return GSOCK_TIMEDOUT;
1267     }
1268     if ( ! FD_ISSET(socket->m_fd, &writefds) ) {
1269         GSocket_Debug(( "GSocket_Output_Timeout is buggy!\n" ));
1270     }
1271     else {
1272         GSocket_Debug(( "GSocket_Output_Timeout seems correct\n" ));
1273     }
1274   }
1275   else
1276   {
1277     GSocket_Debug(( "GSocket_Output_Timeout, didn't try select!\n" ));
1278   }
1279
1280   return GSOCK_NOERROR;
1281 }
1282
1283 int _GSocket_Recv_Stream(GSocket *socket, char *buffer, int size)
1284 {
1285   return recv(socket->m_fd, buffer, size, 0);
1286 }
1287
1288 int _GSocket_Recv_Dgram(GSocket *socket, char *buffer, int size)
1289 {
1290   struct sockaddr from;
1291   SOCKLEN_T fromlen = sizeof(from);
1292   int ret;
1293   GSocketError err;
1294
1295   fromlen = sizeof(from);
1296
1297   ret = recvfrom(socket->m_fd, buffer, size, 0, &from, (SOCKLEN_T *) &fromlen);
1298
1299   if (ret == -1)
1300     return -1;
1301
1302   /* Translate a system address into a GSocket address */
1303   if (!socket->m_peer)
1304   {
1305     socket->m_peer = GAddress_new();
1306     if (!socket->m_peer)
1307     {
1308       socket->m_error = GSOCK_MEMERR;
1309       return -1;
1310     }
1311   }
1312   err = _GAddress_translate_from(socket->m_peer, &from, fromlen);
1313   if (err != GSOCK_NOERROR)
1314   {
1315     GAddress_destroy(socket->m_peer);
1316     socket->m_peer  = NULL;
1317     socket->m_error = err;
1318     return -1;
1319   }
1320
1321   return ret;
1322 }
1323
1324 int _GSocket_Send_Stream(GSocket *socket, const char *buffer, int size)
1325 {
1326   int ret;
1327
1328 #ifndef __VISAGECPP__
1329   MASK_SIGNAL();
1330   ret = send(socket->m_fd, buffer, size, 0);
1331   UNMASK_SIGNAL();
1332 #else
1333   ret = send(socket->m_fd, (char *)buffer, size, 0);
1334 #endif
1335
1336   return ret;
1337 }
1338
1339 int _GSocket_Send_Dgram(GSocket *socket, const char *buffer, int size)
1340 {
1341   struct sockaddr *addr;
1342   int len, ret;
1343   GSocketError err;
1344
1345   if (!socket->m_peer)
1346   {
1347     socket->m_error = GSOCK_INVADDR;
1348     return -1;
1349   }
1350
1351   err = _GAddress_translate_to(socket->m_peer, &addr, &len);
1352   if (err != GSOCK_NOERROR)
1353   {
1354     socket->m_error = err;
1355     return -1;
1356   }
1357
1358 #ifndef __VISAGECPP__
1359   MASK_SIGNAL();
1360   ret = sendto(socket->m_fd, buffer, size, 0, addr, len);
1361   UNMASK_SIGNAL();
1362 #else
1363   ret = sendto(socket->m_fd, (char *)buffer, size, 0, addr, len);
1364 #endif
1365
1366   /* Frees memory allocated from _GAddress_translate_to */
1367   free(addr);
1368
1369   return ret;
1370 }
1371
1372 void _GSocket_Detected_Read(GSocket *socket)
1373 {
1374   char c;
1375
1376   /* If we have already detected a LOST event, then don't try
1377    * to do any further processing.
1378    */
1379   if ((socket->m_detected & GSOCK_LOST_FLAG) != 0)
1380   {
1381     socket->m_establishing = FALSE;
1382
1383     CALL_CALLBACK(socket, GSOCK_LOST);
1384     GSocket_Shutdown(socket);
1385     return;
1386   }
1387
1388   if (recv(socket->m_fd, &c, 1, MSG_PEEK) > 0)
1389   {
1390     CALL_CALLBACK(socket, GSOCK_INPUT);
1391   }
1392   else
1393   {
1394     if (socket->m_server && socket->m_stream)
1395     {
1396       CALL_CALLBACK(socket, GSOCK_CONNECTION);
1397     }
1398     else
1399     {
1400       CALL_CALLBACK(socket, GSOCK_LOST);
1401       GSocket_Shutdown(socket);
1402     }
1403   }
1404 }
1405
1406 void _GSocket_Detected_Write(GSocket *socket)
1407 {
1408   /* If we have already detected a LOST event, then don't try
1409    * to do any further processing.
1410    */
1411   if ((socket->m_detected & GSOCK_LOST_FLAG) != 0)
1412   {
1413     socket->m_establishing = FALSE;
1414
1415     CALL_CALLBACK(socket, GSOCK_LOST);
1416     GSocket_Shutdown(socket);
1417     return;
1418   }
1419
1420   if (socket->m_establishing && !socket->m_server)
1421   {
1422     int error;
1423     SOCKLEN_T len = sizeof(error);
1424
1425     socket->m_establishing = FALSE;
1426
1427     getsockopt(socket->m_fd, SOL_SOCKET, SO_ERROR, (void*)&error, &len);
1428
1429     if (error)
1430     {
1431       CALL_CALLBACK(socket, GSOCK_LOST);
1432       GSocket_Shutdown(socket);
1433     }
1434     else
1435     {
1436       CALL_CALLBACK(socket, GSOCK_CONNECTION);
1437       /* We have to fire this event by hand because CONNECTION (for clients)
1438        * and OUTPUT are internally the same and we just disabled CONNECTION
1439        * events with the above macro.
1440        */
1441       CALL_CALLBACK(socket, GSOCK_OUTPUT);
1442     }
1443   }
1444   else
1445   {
1446     CALL_CALLBACK(socket, GSOCK_OUTPUT);
1447   }
1448 }
1449
1450 /*
1451  * -------------------------------------------------------------------------
1452  * GAddress
1453  * -------------------------------------------------------------------------
1454  */
1455
1456 /* CHECK_ADDRESS verifies that the current address family is either
1457  * GSOCK_NOFAMILY or GSOCK_*family*, and if it is GSOCK_NOFAMILY, it
1458  * initalizes it to be a GSOCK_*family*. In other cases, it returns
1459  * an appropiate error code.
1460  *
1461  * CHECK_ADDRESS_RETVAL does the same but returning 'retval' on error.
1462  */
1463 #define CHECK_ADDRESS(address, family)                              \
1464 {                                                                   \
1465   if (address->m_family == GSOCK_NOFAMILY)                          \
1466     if (_GAddress_Init_##family(address) != GSOCK_NOERROR)          \
1467       return address->m_error;                                      \
1468   if (address->m_family != GSOCK_##family)                          \
1469   {                                                                 \
1470     address->m_error = GSOCK_INVADDR;                               \
1471     return GSOCK_INVADDR;                                           \
1472   }                                                                 \
1473 }
1474
1475 #define CHECK_ADDRESS_RETVAL(address, family, retval)               \
1476 {                                                                   \
1477   if (address->m_family == GSOCK_NOFAMILY)                          \
1478     if (_GAddress_Init_##family(address) != GSOCK_NOERROR)          \
1479       return retval;                                                \
1480   if (address->m_family != GSOCK_##family)                          \
1481   {                                                                 \
1482     address->m_error = GSOCK_INVADDR;                               \
1483     return retval;                                                  \
1484   }                                                                 \
1485 }
1486
1487
1488 GAddress *GAddress_new(void)
1489 {
1490   GAddress *address;
1491
1492   if ((address = (GAddress *) malloc(sizeof(GAddress))) == NULL)
1493     return NULL;
1494
1495   address->m_family  = GSOCK_NOFAMILY;
1496   address->m_addr    = NULL;
1497   address->m_len     = 0;
1498
1499   return address;
1500 }
1501
1502 GAddress *GAddress_copy(GAddress *address)
1503 {
1504   GAddress *addr2;
1505
1506   assert(address != NULL);
1507
1508   if ((addr2 = (GAddress *) malloc(sizeof(GAddress))) == NULL)
1509     return NULL;
1510
1511   memcpy(addr2, address, sizeof(GAddress));
1512
1513   if (address->m_addr && address->m_len > 0)
1514   {
1515     addr2->m_addr = (struct sockaddr *)malloc(addr2->m_len);
1516     if (addr2->m_addr == NULL)
1517     {
1518       free(addr2);
1519       return NULL;
1520     }
1521     memcpy(addr2->m_addr, address->m_addr, addr2->m_len);
1522   }
1523
1524   return addr2;
1525 }
1526
1527 void GAddress_destroy(GAddress *address)
1528 {
1529   assert(address != NULL);
1530
1531   if (address->m_addr)
1532     free(address->m_addr);
1533
1534   free(address);
1535 }
1536
1537 void GAddress_SetFamily(GAddress *address, GAddressType type)
1538 {
1539   assert(address != NULL);
1540
1541   address->m_family = type;
1542 }
1543
1544 GAddressType GAddress_GetFamily(GAddress *address)
1545 {
1546   assert(address != NULL);
1547
1548   return address->m_family;
1549 }
1550
1551 GSocketError _GAddress_translate_from(GAddress *address,
1552                                       struct sockaddr *addr, int len)
1553 {
1554   address->m_realfamily = addr->sa_family;
1555   switch (addr->sa_family)
1556   {
1557     case AF_INET:
1558       address->m_family = GSOCK_INET;
1559       break;
1560     case AF_UNIX:
1561       address->m_family = GSOCK_UNIX;
1562       break;
1563 #ifdef AF_INET6
1564     case AF_INET6:
1565       address->m_family = GSOCK_INET6;
1566       break;
1567 #endif
1568     default:
1569     {
1570       address->m_error = GSOCK_INVOP;
1571       return GSOCK_INVOP;
1572     }
1573   }
1574
1575   if (address->m_addr)
1576     free(address->m_addr);
1577
1578   address->m_len  = len;
1579   address->m_addr = (struct sockaddr *)malloc(len);
1580
1581   if (address->m_addr == NULL)
1582   {
1583     address->m_error = GSOCK_MEMERR;
1584     return GSOCK_MEMERR;
1585   }
1586   memcpy(address->m_addr, addr, len);
1587
1588   return GSOCK_NOERROR;
1589 }
1590
1591 GSocketError _GAddress_translate_to(GAddress *address,
1592                                     struct sockaddr **addr, int *len)
1593 {
1594   if (!address->m_addr)
1595   {
1596     address->m_error = GSOCK_INVADDR;
1597     return GSOCK_INVADDR;
1598   }
1599
1600   *len = address->m_len;
1601   *addr = (struct sockaddr *)malloc(address->m_len);
1602   if (*addr == NULL)
1603   {
1604     address->m_error = GSOCK_MEMERR;
1605     return GSOCK_MEMERR;
1606   }
1607
1608   memcpy(*addr, address->m_addr, address->m_len);
1609   return GSOCK_NOERROR;
1610 }
1611
1612 /*
1613  * -------------------------------------------------------------------------
1614  * Internet address family
1615  * -------------------------------------------------------------------------
1616  */
1617
1618 GSocketError _GAddress_Init_INET(GAddress *address)
1619 {
1620   address->m_len  = sizeof(struct sockaddr_in);
1621   address->m_addr = (struct sockaddr *) malloc(address->m_len);
1622   if (address->m_addr == NULL)
1623   {
1624     address->m_error = GSOCK_MEMERR;
1625     return GSOCK_MEMERR;
1626   }
1627
1628   address->m_family = GSOCK_INET;
1629   address->m_realfamily = PF_INET;
1630   ((struct sockaddr_in *)address->m_addr)->sin_family = AF_INET;
1631   ((struct sockaddr_in *)address->m_addr)->sin_addr.s_addr = INADDR_ANY;
1632
1633   return GSOCK_NOERROR;
1634 }
1635
1636 GSocketError GAddress_INET_SetHostName(GAddress *address, const char *hostname)
1637 {
1638   struct hostent *he;
1639   struct in_addr *addr;
1640
1641   assert(address != NULL);
1642
1643   CHECK_ADDRESS(address, INET);
1644
1645   addr = &(((struct sockaddr_in *)address->m_addr)->sin_addr);
1646
1647   /* If it is a numeric host name, convert it now */
1648 #if defined(HAVE_INET_ATON)
1649   if (inet_aton(hostname, addr) == 0)
1650   {
1651 #elif defined(HAVE_INET_ADDR)
1652   if ( (addr->s_addr = inet_addr(hostname)) == -1 )
1653   {
1654 #else
1655   /* Use gethostbyname by default */
1656 #ifndef __WXMAC__
1657   int val = 1;  /* VA doesn't like constants in conditional expressions */
1658   if (val)
1659 #endif
1660   {
1661 #endif
1662     struct in_addr *array_addr;
1663
1664     /* It is a real name, we solve it */
1665     if ((he = gethostbyname(hostname)) == NULL)
1666     {
1667       /* Reset to invalid address */
1668       addr->s_addr = INADDR_NONE;
1669       address->m_error = GSOCK_NOHOST;
1670       return GSOCK_NOHOST;
1671     }
1672     array_addr = (struct in_addr *) *(he->h_addr_list);
1673     addr->s_addr = array_addr[0].s_addr;
1674   }
1675   return GSOCK_NOERROR;
1676 }
1677
1678 GSocketError GAddress_INET_SetAnyAddress(GAddress *address)
1679 {
1680   return GAddress_INET_SetHostAddress(address, INADDR_ANY);
1681 }
1682
1683 GSocketError GAddress_INET_SetHostAddress(GAddress *address,
1684                                           unsigned long hostaddr)
1685 {
1686   struct in_addr *addr;
1687
1688   assert(address != NULL);
1689
1690   CHECK_ADDRESS(address, INET);
1691
1692   addr = &(((struct sockaddr_in *)address->m_addr)->sin_addr);
1693   addr->s_addr = htonl(hostaddr);
1694
1695   return GSOCK_NOERROR;
1696 }
1697
1698 GSocketError GAddress_INET_SetPortName(GAddress *address, const char *port,
1699                                        const char *protocol)
1700 {
1701   struct servent *se;
1702   struct sockaddr_in *addr;
1703
1704   assert(address != NULL);
1705   CHECK_ADDRESS(address, INET);
1706
1707   if (!port)
1708   {
1709     address->m_error = GSOCK_INVPORT;
1710     return GSOCK_INVPORT;
1711   }
1712
1713   se = getservbyname(port, protocol);
1714   if (!se)
1715   {
1716     /* the cast to int suppresses compiler warnings about subscript having the
1717        type char */
1718     if (isdigit((int)port[0]))
1719     {
1720       int port_int;
1721
1722       port_int = atoi(port);
1723       addr = (struct sockaddr_in *)address->m_addr;
1724       addr->sin_port = htons(port_int);
1725       return GSOCK_NOERROR;
1726     }
1727
1728     address->m_error = GSOCK_INVPORT;
1729     return GSOCK_INVPORT;
1730   }
1731
1732   addr = (struct sockaddr_in *)address->m_addr;
1733   addr->sin_port = se->s_port;
1734
1735   return GSOCK_NOERROR;
1736 }
1737
1738 GSocketError GAddress_INET_SetPort(GAddress *address, unsigned short port)
1739 {
1740   struct sockaddr_in *addr;
1741
1742   assert(address != NULL);
1743   CHECK_ADDRESS(address, INET);
1744
1745   addr = (struct sockaddr_in *)address->m_addr;
1746   addr->sin_port = htons(port);
1747
1748   return GSOCK_NOERROR;
1749 }
1750
1751 GSocketError GAddress_INET_GetHostName(GAddress *address, char *hostname, size_t sbuf)
1752 {
1753   struct hostent *he;
1754   char *addr_buf;
1755   struct sockaddr_in *addr;
1756
1757   assert(address != NULL);
1758   CHECK_ADDRESS(address, INET);
1759
1760   addr = (struct sockaddr_in *)address->m_addr;
1761   addr_buf = (char *)&(addr->sin_addr);
1762
1763   he = gethostbyaddr(addr_buf, sizeof(addr->sin_addr), AF_INET);
1764   if (he == NULL)
1765   {
1766     address->m_error = GSOCK_NOHOST;
1767     return GSOCK_NOHOST;
1768   }
1769
1770   strncpy(hostname, he->h_name, sbuf);
1771
1772   return GSOCK_NOERROR;
1773 }
1774
1775 unsigned long GAddress_INET_GetHostAddress(GAddress *address)
1776 {
1777   struct sockaddr_in *addr;
1778
1779   assert(address != NULL);
1780   CHECK_ADDRESS_RETVAL(address, INET, 0);
1781
1782   addr = (struct sockaddr_in *)address->m_addr;
1783
1784   return ntohl(addr->sin_addr.s_addr);
1785 }
1786
1787 unsigned short GAddress_INET_GetPort(GAddress *address)
1788 {
1789   struct sockaddr_in *addr;
1790
1791   assert(address != NULL);
1792   CHECK_ADDRESS_RETVAL(address, INET, 0);
1793
1794   addr = (struct sockaddr_in *)address->m_addr;
1795   return ntohs(addr->sin_port);
1796 }
1797
1798 /*
1799  * -------------------------------------------------------------------------
1800  * Unix address family
1801  * -------------------------------------------------------------------------
1802  */
1803
1804 #ifndef __VISAGECPP__
1805 GSocketError _GAddress_Init_UNIX(GAddress *address)
1806 {
1807   address->m_len  = sizeof(struct sockaddr_un);
1808   address->m_addr = (struct sockaddr *)malloc(address->m_len);
1809   if (address->m_addr == NULL)
1810   {
1811     address->m_error = GSOCK_MEMERR;
1812     return GSOCK_MEMERR;
1813   }
1814
1815   address->m_family = GSOCK_UNIX;
1816   address->m_realfamily = PF_UNIX;
1817   ((struct sockaddr_un *)address->m_addr)->sun_family = AF_UNIX;
1818   ((struct sockaddr_un *)address->m_addr)->sun_path[0] = 0;
1819
1820   return GSOCK_NOERROR;
1821 }
1822
1823 #define UNIX_SOCK_PATHLEN (sizeof(addr->sun_path)/sizeof(addr->sun_path[0]))
1824
1825 GSocketError GAddress_UNIX_SetPath(GAddress *address, const char *path)
1826 {
1827   struct sockaddr_un *addr;
1828
1829   assert(address != NULL);
1830
1831   CHECK_ADDRESS(address, UNIX);
1832
1833   addr = ((struct sockaddr_un *)address->m_addr);
1834   strncpy(addr->sun_path, path, UNIX_SOCK_PATHLEN);
1835   addr->sun_path[UNIX_SOCK_PATHLEN - 1] = '\0';
1836
1837   return GSOCK_NOERROR;
1838 }
1839
1840 GSocketError GAddress_UNIX_GetPath(GAddress *address, char *path, size_t sbuf)
1841 {
1842   struct sockaddr_un *addr;
1843
1844   assert(address != NULL);
1845   CHECK_ADDRESS(address, UNIX);
1846
1847   addr = (struct sockaddr_un *)address->m_addr;
1848
1849   strncpy(path, addr->sun_path, sbuf);
1850
1851   return GSOCK_NOERROR;
1852 }
1853 #endif  /* !defined(__VISAGECPP__) */
1854 #endif  /* wxUSE_SOCKETS || defined(__GSOCKET_STANDALONE__) */
1855