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
 470   /* Create the socket */
 471   sck->m_fd = socket(sck->m_local->m_realfamily, SOCK_STREAM, 0);
 472
 473   if (sck->m_fd == INVALID_SOCKET)
 474   {
 475     sck->m_error = GSOCK_IOERR;
 476     return GSOCK_IOERR;
 477   }
 478 #if defined(__EMX__) || defined(__VISAGECPP__)
 479   ioctl(sck->m_fd, FIONBIO, (char*)&arg, sizeof(arg));
 480 #else
 481   ioctl(sck->m_fd, FIONBIO, &arg);
 482 #endif
 483   _GSocket_Enable_Events(sck);
 484
 485   /* allow a socket to re-bind if the socket is in the TIME_WAIT
 486      state after being previously closed.
 487    */
 488   if (sck->m_reusable)
 489     setsockopt(sck->m_fd, SOL_SOCKET, SO_REUSEADDR, (const char*)&arg, sizeof(u_long));
 490
 491   /* Bind to the local address,
 492    * retrieve the actual address bound,
 493    * and listen up to 5 connections.
 494    */
 495   if ((bind(sck->m_fd, sck->m_local->m_addr, sck->m_local->m_len) != 0) ||
 496       (getsockname(sck->m_fd,
 497                    sck->m_local->m_addr,
 498                    (SOCKLEN_T *) &sck->m_local->m_len) != 0) ||
 499       (listen(sck->m_fd, 5) != 0))
 500   {
 501     GSocket_close(sck);
 502     sck->m_error = GSOCK_IOERR;
 503     return GSOCK_IOERR;
 504   }
 505
 506   return GSOCK_NOERROR;
 507 }
 508
 509 /* GSocket_WaitConnection:
 510  *  Waits for an incoming client connection. Returns a pointer to
 511  *  a GSocket object, or NULL if there was an error, in which case
 512  *  the last error field will be updated for the calling GSocket.
 513  *
 514  *  Error codes (set in the calling GSocket)
 515  *    GSOCK_INVSOCK    - the socket is not valid or not a server.
 516  *    GSOCK_TIMEDOUT   - timeout, no incoming connections.
 517  *    GSOCK_WOULDBLOCK - the call would block and the socket is nonblocking.
 518  *    GSOCK_MEMERR     - couldn't allocate memory.
 519  *    GSOCK_IOERR      - low-level error.
 520  */
 521 GSocket *GSocket_WaitConnection(GSocket *socket)
 522 {
 523   struct sockaddr from;
 524   SOCKLEN_T fromlen = sizeof(from);
 525   GSocket *connection;
 526   GSocketError err;
 527   int arg = 1;
 528
 529   assert(socket != NULL);
 530
 531   /* Reenable CONNECTION events */
 532   _GSocket_Enable(socket, GSOCK_CONNECTION);
 533
 534   /* If the socket has already been created, we exit immediately */
 535   if (socket->m_fd == INVALID_SOCKET || !socket->m_server)
 536   {
 537     socket->m_error = GSOCK_INVSOCK;
 538     return NULL;
 539   }
 540
 541   /* Create a GSocket object for the new connection */
 542   connection = GSocket_new();
 543
 544   if (!connection)
 545   {
 546     socket->m_error = GSOCK_MEMERR;
 547     return NULL;
 548   }
 549
 550   /* Wait for a connection (with timeout) */
 551   if (_GSocket_Input_Timeout(socket) == GSOCK_TIMEDOUT)
 552   {
 553     GSocket_destroy(connection);
 554     /* socket->m_error set by _GSocket_Input_Timeout */
 555     return NULL;
 556   }
 557
 558   connection->m_fd = accept(socket->m_fd, &from, (SOCKLEN_T *) &fromlen);
 559
 560   if (connection->m_fd == INVALID_SOCKET)
 561   {
 562     if (errno == EWOULDBLOCK)
 563       socket->m_error = GSOCK_WOULDBLOCK;
 564     else
 565       socket->m_error = GSOCK_IOERR;
 566
 567     GSocket_destroy(connection);
 568     return NULL;
 569   }
 570
 571   /* Initialize all fields */
 572   connection->m_server   = FALSE;
 573   connection->m_stream   = TRUE;
 574
 575   /* Setup the peer address field */
 576   connection->m_peer = GAddress_new();
 577   if (!connection->m_peer)
 578   {
 579     GSocket_destroy(connection);
 580     socket->m_error = GSOCK_MEMERR;
 581     return NULL;
 582   }
 583   err = _GAddress_translate_from(connection->m_peer, &from, fromlen);
 584   if (err != GSOCK_NOERROR)
 585   {
 586     GAddress_destroy(connection->m_peer);
 587     GSocket_destroy(connection);
 588     socket->m_error = err;
 589     return NULL;
 590   }
 591 #if defined(__EMX__) || defined(__VISAGECPP__)
 592   ioctl(connection->m_fd, FIONBIO, (char*)&arg, sizeof(arg));
 593 #else
 594   ioctl(connection->m_fd, FIONBIO, &arg);
 595 #endif
 596   _GSocket_Enable_Events(connection);
 597
 598   return connection;
 599 }
 600
 601 int GSocket_SetReusable(GSocket *socket)
 602 {
 603     /* socket must not be null, and must not be in use/already bound */
 604     if (NULL != socket && socket->m_fd == INVALID_SOCKET) {
 605         socket->m_reusable = TRUE;
 606         return TRUE;
 607     }
 608     return FALSE;
 609 }
 610
 611 /* Client specific parts */
 612
 613 /* GSocket_Connect:
 614  *  For stream (connection oriented) sockets, GSocket_Connect() tries
 615  *  to establish a client connection to a server using the peer address
 616  *  as established with GSocket_SetPeer(). Returns GSOCK_NOERROR if the
 617  *  connection has been succesfully established, or one of the error
 618  *  codes listed below. Note that for nonblocking sockets, a return
 619  *  value of GSOCK_WOULDBLOCK doesn't mean a failure. The connection
 620  *  request can be completed later; you should use GSocket_Select()
 621  *  to poll for GSOCK_CONNECTION | GSOCK_LOST, or wait for the
 622  *  corresponding asynchronous events.
 623  *
 624  *  For datagram (non connection oriented) sockets, GSocket_Connect()
 625  *  just sets the peer address established with GSocket_SetPeer() as
 626  *  default destination.
 627  *
 628  *  Error codes:
 629  *    GSOCK_INVSOCK    - the socket is in use or not valid.
 630  *    GSOCK_INVADDR    - the peer address has not been established.
 631  *    GSOCK_TIMEDOUT   - timeout, the connection failed.
 632  *    GSOCK_WOULDBLOCK - connection in progress (nonblocking sockets only)
 633  *    GSOCK_MEMERR     - couldn't allocate memory.
 634  *    GSOCK_IOERR      - low-level error.
 635  */
 636 GSocketError GSocket_Connect(GSocket *sck, GSocketStream stream)
 637 {
 638   int err, ret;
 639   int arg = 1;
 640
 641   assert(sck != NULL);
 642
 643   /* Enable CONNECTION events (needed for nonblocking connections) */
 644   _GSocket_Enable(sck, GSOCK_CONNECTION);
 645
 646   if (sck->m_fd != INVALID_SOCKET)
 647   {
 648     sck->m_error = GSOCK_INVSOCK;
 649     return GSOCK_INVSOCK;
 650   }
 651
 652   if (!sck->m_peer)
 653   {
 654     sck->m_error = GSOCK_INVADDR;
 655     return GSOCK_INVADDR;
 656   }
 657
 658   /* Streamed or dgram socket? */
 659   sck->m_stream   = (stream == GSOCK_STREAMED);
 660   sck->m_server   = FALSE;
 661   sck->m_establishing = FALSE;
 662
 663   /* Create the socket */
 664   sck->m_fd = socket(sck->m_peer->m_realfamily,
 665                      sck->m_stream? SOCK_STREAM : SOCK_DGRAM, 0);
 666
 667   if (sck->m_fd == INVALID_SOCKET)
 668   {
 669     sck->m_error = GSOCK_IOERR;
 670     return GSOCK_IOERR;
 671   }
 672 #if defined(__EMX__) || defined(__VISAGECPP__)
 673   ioctl(sck->m_fd, FIONBIO, (char*)&arg, sizeof(arg));
 674 #else
 675   ioctl(sck->m_fd, FIONBIO, &arg);
 676 #endif
 677   _GSocket_Enable_Events(sck);
 678
 679   /* Connect it to the peer address, with a timeout (see below) */
 680   ret = connect(sck->m_fd, sck->m_peer->m_addr, sck->m_peer->m_len);
 681
 682   if (ret == -1)
 683   {
 684     err = errno;
 685
 686     /* If connect failed with EINPROGRESS and the GSocket object
 687      * is in blocking mode, we select() for the specified timeout
 688      * checking for writability to see if the connection request
 689      * completes.
 690      */
 691     if ((err == EINPROGRESS) && (!sck->m_non_blocking))
 692     {
 693       if (_GSocket_Output_Timeout(sck) == GSOCK_TIMEDOUT)
 694       {
 695         GSocket_close(sck);
 696         /* sck->m_error is set in _GSocket_Output_Timeout */
 697         return GSOCK_TIMEDOUT;
 698       }
 699       else
 700       {
 701         int error;
 702         SOCKLEN_T len = sizeof(error);
 703
 704         getsockopt(sck->m_fd, SOL_SOCKET, SO_ERROR, (void*) &error, &len);
 705
 706         if (!error)
 707           return GSOCK_NOERROR;
 708       }
 709     }
 710
 711     /* If connect failed with EINPROGRESS and the GSocket object
 712      * is set to nonblocking, we set m_error to GSOCK_WOULDBLOCK
 713      * (and return GSOCK_WOULDBLOCK) but we don't close the socket;
 714      * this way if the connection completes, a GSOCK_CONNECTION
 715      * event will be generated, if enabled.
 716      */
 717     if ((err == EINPROGRESS) && (sck->m_non_blocking))
 718     {
 719       sck->m_establishing = TRUE;
 720       sck->m_error = GSOCK_WOULDBLOCK;
 721       return GSOCK_WOULDBLOCK;
 722     }
 723
 724     /* If connect failed with an error other than EINPROGRESS,
 725      * then the call to GSocket_Connect has failed.
 726      */
 727     GSocket_close(sck);
 728     sck->m_error = GSOCK_IOERR;
 729     return GSOCK_IOERR;
 730   }
 731
 732   return GSOCK_NOERROR;
 733 }
 734
 735 /* Datagram sockets */
 736
 737 /* GSocket_SetNonOriented:
 738  *  Sets up this socket as a non-connection oriented (datagram) socket.
 739  *  Before using this function, the local address must have been set
 740  *  with GSocket_SetLocal(), or the call will fail. Returns GSOCK_NOERROR
 741  *  on success, or one of the following otherwise.
 742  *
 743  *  Error codes:
 744  *    GSOCK_INVSOCK - the socket is in use.
 745  *    GSOCK_INVADDR - the local address has not been set.
 746  *    GSOCK_IOERR   - low-level error.
 747  */
 748 GSocketError GSocket_SetNonOriented(GSocket *sck)
 749 {
 750   int arg = 1;
 751
 752   assert(sck != NULL);
 753
 754   if (sck->m_fd != INVALID_SOCKET)
 755   {
 756     sck->m_error = GSOCK_INVSOCK;
 757     return GSOCK_INVSOCK;
 758   }
 759
 760   if (!sck->m_local)
 761   {
 762     sck->m_error = GSOCK_INVADDR;
 763     return GSOCK_INVADDR;
 764   }
 765
 766   /* Initialize all fields */
 767   sck->m_stream   = FALSE;
 768   sck->m_server   = FALSE;
 769
 770   /* Create the socket */
 771   sck->m_fd = socket(sck->m_local->m_realfamily, SOCK_DGRAM, 0);
 772
 773   if (sck->m_fd == INVALID_SOCKET)
 774   {
 775     sck->m_error = GSOCK_IOERR;
 776     return GSOCK_IOERR;
 777   }
 778 #if defined(__EMX__) || defined(__VISAGECPP__)
 779   ioctl(sck->m_fd, FIONBIO, (char*)&arg, sizeof(arg));
 780 #else
 781   ioctl(sck->m_fd, FIONBIO, &arg);
 782 #endif
 783   _GSocket_Enable_Events(sck);
 784
 785   /* Bind to the local address,
 786    * and retrieve the actual address bound.
 787    */
 788   if ((bind(sck->m_fd, sck->m_local->m_addr, sck->m_local->m_len) != 0) ||
 789       (getsockname(sck->m_fd,
 790                    sck->m_local->m_addr,
 791                    (SOCKLEN_T *) &sck->m_local->m_len) != 0))
 792   {
 793     GSocket_close(sck);
 794     sck->m_error = GSOCK_IOERR;
 795     return GSOCK_IOERR;
 796   }
 797
 798   return GSOCK_NOERROR;
 799 }
 800
 801 /* Generic IO */
 802
 803 /* Like recv(), send(), ... */
 804 int GSocket_Read(GSocket *socket, char *buffer, int size)
 805 {
 806   int ret;
 807
 808   assert(socket != NULL);
 809
 810   if (socket->m_fd == INVALID_SOCKET || socket->m_server)
 811   {
 812     socket->m_error = GSOCK_INVSOCK;
 813     return -1;
 814   }
 815
 816   /* Disable events during query of socket status */
 817   _GSocket_Disable(socket, GSOCK_INPUT);
 818
 819   /* If the socket is blocking, wait for data (with a timeout) */
 820   if (_GSocket_Input_Timeout(socket) == GSOCK_TIMEDOUT)
 821     /* We no longer return here immediately, otherwise socket events would not be re-enabled! */
 822     ret = -1;
 823   else {
 824     /* Read the data */
 825     if (socket->m_stream)
 826       ret = _GSocket_Recv_Stream(socket, buffer, size);
 827     else
 828       ret = _GSocket_Recv_Dgram(socket, buffer, size);
 829   }
 830
 831   if (ret == -1)
 832   {
 833     if (errno == EWOULDBLOCK)
 834       socket->m_error = GSOCK_WOULDBLOCK;
 835     else
 836       socket->m_error = GSOCK_IOERR;
 837   }
 838
 839   /* Enable events again now that we are done processing */
 840   _GSocket_Enable(socket, GSOCK_INPUT);
 841
 842   return ret;
 843 }
 844
 845 int GSocket_Write(GSocket *socket, const char *buffer, int size)
 846 {
 847   int ret;
 848
 849   assert(socket != NULL);
 850
 851   GSocket_Debug(( "GSocket_Write #1, size %d\n", size ));
 852
 853   if (socket->m_fd == INVALID_SOCKET || socket->m_server)
 854   {
 855     socket->m_error = GSOCK_INVSOCK;
 856     return -1;
 857   }
 858
 859   GSocket_Debug(( "GSocket_Write #2, size %d\n", size ));
 860
 861   /* If the socket is blocking, wait for writability (with a timeout) */
 862   if (_GSocket_Output_Timeout(socket) == GSOCK_TIMEDOUT)
 863     return -1;
 864
 865   GSocket_Debug(( "GSocket_Write #3, size %d\n", size ));
 866
 867   /* Write the data */
 868   if (socket->m_stream)
 869     ret = _GSocket_Send_Stream(socket, buffer, size);
 870   else
 871     ret = _GSocket_Send_Dgram(socket, buffer, size);
 872
 873   GSocket_Debug(( "GSocket_Write #4, size %d\n", size ));
 874
 875   if (ret == -1)
 876   {
 877     if (errno == EWOULDBLOCK)
 878     {
 879       socket->m_error = GSOCK_WOULDBLOCK;
 880       GSocket_Debug(( "GSocket_Write error WOULDBLOCK\n" ));
 881     }
 882     else
 883     {
 884       socket->m_error = GSOCK_IOERR;
 885       GSocket_Debug(( "GSocket_Write error IOERR\n" ));
 886     }
 887
 888     /* Only reenable OUTPUT events after an error (just like WSAAsyncSelect
 889      * in MSW). Once the first OUTPUT event is received, users can assume
 890      * that the socket is writable until a read operation fails. Only then
 891      * will further OUTPUT events be posted.
 892      */
 893     _GSocket_Enable(socket, GSOCK_OUTPUT);
 894     return -1;
 895   }
 896
 897   GSocket_Debug(( "GSocket_Write #5, size %d ret %d\n", size, ret ));
 898
 899   return ret;
 900 }
 901
 902 /* GSocket_Select:
 903  *  Polls the socket to determine its status. This function will
 904  *  check for the events specified in the 'flags' parameter, and
 905  *  it will return a mask indicating which operations can be
 906  *  performed. This function won't block, regardless of the
 907  *  mode (blocking | nonblocking) of the socket.
 908  */
 909 GSocketEventFlags GSocket_Select(GSocket *socket, GSocketEventFlags flags)
 910 {
 911   if (!USE_GUI())
 912   {
 913
 914     GSocketEventFlags result = 0;
 915     fd_set readfds;
 916     fd_set writefds;
 917     fd_set exceptfds;
 918     struct timeval tv;
 919
 920     assert(socket != NULL);
 921
 922     /* Do not use a static struct, Linux can garble it */
 923     tv.tv_sec = socket->m_timeout / 1000;
 924     tv.tv_usec = (socket->m_timeout % 1000) / 1000;
 925
 926     FD_ZERO(&readfds);
 927     FD_ZERO(&writefds);
 928     FD_ZERO(&exceptfds);
 929     FD_SET(socket->m_fd, &readfds);
 930     if (flags & GSOCK_OUTPUT_FLAG || flags & GSOCK_CONNECTION_FLAG)
 931       FD_SET(socket->m_fd, &writefds);
 932     FD_SET(socket->m_fd, &exceptfds);
 933
 934     /* Check 'sticky' CONNECTION flag first */
 935     result |= (GSOCK_CONNECTION_FLAG & socket->m_detected);
 936
 937     /* If we have already detected a LOST event, then don't try
 938      * to do any further processing.
 939      */
 940     if ((socket->m_detected & GSOCK_LOST_FLAG) != 0)
 941     {
 942       socket->m_establishing = FALSE;
 943
 944       return (GSOCK_LOST_FLAG & flags);
 945     }
 946
 947     /* Try select now */
 948     if (select(socket->m_fd + 1, &readfds, &writefds, &exceptfds, &tv) <= 0)
 949     {
 950       /* What to do here? */
 951       return (result & flags);
 952     }
 953
 954     /* Check for readability */
 955     if (FD_ISSET(socket->m_fd, &readfds))
 956     {
 957       char c;
 958
 959       if (recv(socket->m_fd, &c, 1, MSG_PEEK) > 0)
 960       {
 961         result |= GSOCK_INPUT_FLAG;
 962       }
 963       else
 964       {
 965         if (socket->m_server && socket->m_stream)
 966         {
 967           result |= GSOCK_CONNECTION_FLAG;
 968           socket->m_detected |= GSOCK_CONNECTION_FLAG;
 969         }
 970         else
 971         {
 972           socket->m_detected = GSOCK_LOST_FLAG;
 973           socket->m_establishing = FALSE;
 974
 975           /* LOST event: Abort any further processing */
 976           return (GSOCK_LOST_FLAG & flags);
 977         }
 978       }
 979     }
 980
 981     /* Check for writability */
 982     if (FD_ISSET(socket->m_fd, &writefds))
 983     {
 984       if (socket->m_establishing && !socket->m_server)
 985       {
 986         int error;
 987         SOCKLEN_T len = sizeof(error);
 988
 989         socket->m_establishing = FALSE;
 990
 991         getsockopt(socket->m_fd, SOL_SOCKET, SO_ERROR, (void*)&error, &len);
 992
 993         if (error)
 994         {
 995           socket->m_detected = GSOCK_LOST_FLAG;
 996
 997           /* LOST event: Abort any further processing */
 998           return (GSOCK_LOST_FLAG & flags);
 999         }
1000         else
1001         {
1002           result |= GSOCK_CONNECTION_FLAG;
1003           socket->m_detected |= GSOCK_CONNECTION_FLAG;
1004         }
1005       }
1006       else
1007       {
1008         result |= GSOCK_OUTPUT_FLAG;
1009       }
1010     }
1011
1012     /* Check for exceptions and errors (is this useful in Unices?) */
1013     if (FD_ISSET(socket->m_fd, &exceptfds))
1014     {
1015       socket->m_establishing = FALSE;
1016       socket->m_detected = GSOCK_LOST_FLAG;
1017
1018       /* LOST event: Abort any further processing */
1019       return (GSOCK_LOST_FLAG & flags);
1020     }
1021
1022     return (result & flags);
1023
1024   }
1025   else
1026   {
1027
1028     assert(socket != NULL);
1029     return flags & socket->m_detected;
1030
1031   }
1032 }
1033
1034 /* Flags */
1035
1036 /* GSocket_SetNonBlocking:
1037  *  Sets the socket to non-blocking mode. All IO calls will return
1038  *  immediately.
1039  */
1040 void GSocket_SetNonBlocking(GSocket *socket, int non_block)
1041 {
1042   assert(socket != NULL);
1043
1044   GSocket_Debug( ("GSocket_SetNonBlocking: %d\n", (int)non_block) );
1045
1046   socket->m_non_blocking = non_block;
1047 }
1048
1049 /* GSocket_SetTimeout:
1050  *  Sets the timeout for blocking calls. Time is expressed in
1051  *  milliseconds.
1052  */
1053 void GSocket_SetTimeout(GSocket *socket, unsigned long millisec)
1054 {
1055   assert(socket != NULL);
1056
1057   socket->m_timeout = millisec;
1058 }
1059
1060 /* GSocket_GetError:
1061  *  Returns the last error occured for this socket. Note that successful
1062  *  operations do not clear this back to GSOCK_NOERROR, so use it only
1063  *  after an error.
1064  */
1065 GSocketError GSocket_GetError(GSocket *socket)
1066 {
1067   assert(socket != NULL);
1068
1069   return socket->m_error;
1070 }
1071
1072 /* Callbacks */
1073
1074 /* GSOCK_INPUT:
1075  *   There is data to be read in the input buffer. If, after a read
1076  *   operation, there is still data available, the callback function will
1077  *   be called again.
1078  * GSOCK_OUTPUT:
1079  *   The socket is available for writing. That is, the next write call
1080  *   won't block. This event is generated only once, when the connection is
1081  *   first established, and then only if a call failed with GSOCK_WOULDBLOCK,
1082  *   when the output buffer empties again. This means that the app should
1083  *   assume that it can write since the first OUTPUT event, and no more
1084  *   OUTPUT events will be generated unless an error occurs.
1085  * GSOCK_CONNECTION:
1086  *   Connection succesfully established, for client sockets, or incoming
1087  *   client connection, for server sockets. Wait for this event (also watch
1088  *   out for GSOCK_LOST) after you issue a nonblocking GSocket_Connect() call.
1089  * GSOCK_LOST:
1090  *   The connection is lost (or a connection request failed); this could
1091  *   be due to a failure, or due to the peer closing it gracefully.
1092  */
1093
1094 /* GSocket_SetCallback:
1095  *  Enables the callbacks specified by 'flags'. Note that 'flags'
1096  *  may be a combination of flags OR'ed toghether, so the same
1097  *  callback function can be made to accept different events.
1098  *  The callback function must have the following prototype:
1099  *
1100  *  void function(GSocket *socket, GSocketEvent event, char *cdata)
1101  */
1102 void GSocket_SetCallback(GSocket *socket, GSocketEventFlags flags,
1103                          GSocketCallback callback, char *cdata)
1104 {
1105   int count;
1106
1107   assert(socket != NULL);
1108
1109   for (count = 0; count < GSOCK_MAX_EVENT; count++)
1110   {
1111     if ((flags & (1 << count)) != 0)
1112     {
1113       socket->m_cbacks[count] = callback;
1114       socket->m_data[count] = cdata;
1115     }
1116   }
1117 }
1118
1119 /* GSocket_UnsetCallback:
1120  *  Disables all callbacks specified by 'flags', which may be a
1121  *  combination of flags OR'ed toghether.
1122  */
1123 void GSocket_UnsetCallback(GSocket *socket, GSocketEventFlags flags)
1124 {
1125   int count;
1126
1127   assert(socket != NULL);
1128
1129   for (count = 0; count < GSOCK_MAX_EVENT; count++)
1130   {
1131     if ((flags & (1 << count)) != 0)
1132     {
1133       socket->m_cbacks[count] = NULL;
1134       socket->m_data[count] = NULL;
1135     }
1136   }
1137 }
1138
1139 GSocketError GSocket_GetSockOpt(GSocket *socket, int level, int optname,
1140                                 void *optval, int *optlen)
1141 {
1142     if (getsockopt(socket->m_fd, level, optname, optval, optlen) == 0)
1143     {
1144         return GSOCK_NOERROR;
1145     }
1146     return GSOCK_OPTERR;
1147 }
1148
1149 GSocketError GSocket_SetSockOpt(GSocket *socket, int level, int optname,
1150                                 const void *optval, int optlen)
1151 {
1152     if (setsockopt(socket->m_fd, level, optname, optval, optlen) == 0)
1153     {
1154         return GSOCK_NOERROR;
1155     }
1156     return GSOCK_OPTERR;
1157 }
1158
1159 #define CALL_CALLBACK(socket, event) {                                  \
1160   _GSocket_Disable(socket, event);                                      \
1161   if (socket->m_cbacks[event])                                          \
1162     socket->m_cbacks[event](socket, event, socket->m_data[event]);      \
1163 }
1164
1165
1166 void _GSocket_Enable(GSocket *socket, GSocketEvent event)
1167 {
1168   socket->m_detected &= ~(1 << event);
1169   _GSocket_Install_Callback(socket, event);
1170 }
1171
1172 void _GSocket_Disable(GSocket *socket, GSocketEvent event)
1173 {
1174   socket->m_detected |= (1 << event);
1175   _GSocket_Uninstall_Callback(socket, event);
1176 }
1177
1178 /* _GSocket_Input_Timeout:
1179  *  For blocking sockets, wait until data is available or
1180  *  until timeout ellapses.
1181  */
1182 GSocketError _GSocket_Input_Timeout(GSocket *socket)
1183 {
1184   struct timeval tv;
1185   fd_set readfds;
1186   int ret;
1187
1188   /* Linux select() will overwrite the struct on return */
1189   tv.tv_sec  = (socket->m_timeout / 1000);
1190   tv.tv_usec = (socket->m_timeout % 1000) * 1000;
1191
1192   if (!socket->m_non_blocking)
1193   {
1194     FD_ZERO(&readfds);
1195     FD_SET(socket->m_fd, &readfds);
1196     ret = select(socket->m_fd + 1, &readfds, NULL, NULL, &tv);
1197     if (ret == 0)
1198     {
1199       GSocket_Debug(( "GSocket_Input_Timeout, select returned 0\n" ));
1200       socket->m_error = GSOCK_TIMEDOUT;
1201       return GSOCK_TIMEDOUT;
1202     }
1203     if (ret == -1)
1204     {
1205       GSocket_Debug(( "GSocket_Input_Timeout, select returned -1\n" ));
1206       if (errno == EBADF) { GSocket_Debug(( "Invalid file descriptor\n" )); }
1207       if (errno == EINTR) { GSocket_Debug(( "A non blocked signal was caught\n" )); }
1208       if (errno == EINVAL) { GSocket_Debug(( "The highest number descriptor is negative\n" )); }
1209       if (errno == ENOMEM) { GSocket_Debug(( "Not enough memory\n" )); }
1210       socket->m_error = GSOCK_TIMEDOUT;
1211       return GSOCK_TIMEDOUT;
1212     }
1213   }
1214   return GSOCK_NOERROR;
1215 }
1216
1217 /* _GSocket_Output_Timeout:
1218  *  For blocking sockets, wait until data can be sent without
1219  *  blocking or until timeout ellapses.
1220  */
1221 GSocketError _GSocket_Output_Timeout(GSocket *socket)
1222 {
1223   struct timeval tv;
1224   fd_set writefds;
1225   int ret;
1226
1227   /* Linux select() will overwrite the struct on return */
1228   tv.tv_sec  = (socket->m_timeout / 1000);
1229   tv.tv_usec = (socket->m_timeout % 1000) * 1000;
1230
1231   GSocket_Debug( ("m_non_blocking has: %d\n", (int)socket->m_non_blocking) );
1232
1233   if (!socket->m_non_blocking)
1234   {
1235     FD_ZERO(&writefds);
1236     FD_SET(socket->m_fd, &writefds);
1237     ret = select(socket->m_fd + 1, NULL, &writefds, NULL, &tv);
1238     if (ret == 0)
1239     {
1240       GSocket_Debug(( "GSocket_Output_Timeout, select returned 0\n" ));
1241       socket->m_error = GSOCK_TIMEDOUT;
1242       return GSOCK_TIMEDOUT;
1243     }
1244     if (ret == -1)
1245     {
1246       GSocket_Debug(( "GSocket_Output_Timeout, select returned -1\n" ));
1247       if (errno == EBADF) { GSocket_Debug(( "Invalid file descriptor\n" )); }
1248       if (errno == EINTR) { GSocket_Debug(( "A non blocked signal was caught\n" )); }
1249       if (errno == EINVAL) { GSocket_Debug(( "The highest number descriptor is negative\n" )); }
1250       if (errno == ENOMEM) { GSocket_Debug(( "Not enough memory\n" )); }
1251       socket->m_error = GSOCK_TIMEDOUT;
1252       return GSOCK_TIMEDOUT;
1253     }
1254     if ( ! FD_ISSET(socket->m_fd, &writefds) ) {
1255         GSocket_Debug(( "GSocket_Output_Timeout is buggy!\n" ));
1256     }
1257     else {
1258         GSocket_Debug(( "GSocket_Output_Timeout seems correct\n" ));
1259     }
1260   }
1261   else
1262   {
1263     GSocket_Debug(( "GSocket_Output_Timeout, didn't try select!\n" ));
1264   }
1265
1266   return GSOCK_NOERROR;
1267 }
1268
1269 int _GSocket_Recv_Stream(GSocket *socket, char *buffer, int size)
1270 {
1271   return recv(socket->m_fd, buffer, size, 0);
1272 }
1273
1274 int _GSocket_Recv_Dgram(GSocket *socket, char *buffer, int size)
1275 {
1276   struct sockaddr from;
1277   SOCKLEN_T fromlen = sizeof(from);
1278   int ret;
1279   GSocketError err;
1280
1281   fromlen = sizeof(from);
1282
1283   ret = recvfrom(socket->m_fd, buffer, size, 0, &from, (SOCKLEN_T *) &fromlen);
1284
1285   if (ret == -1)
1286     return -1;
1287
1288   /* Translate a system address into a GSocket address */
1289   if (!socket->m_peer)
1290   {
1291     socket->m_peer = GAddress_new();
1292     if (!socket->m_peer)
1293     {
1294       socket->m_error = GSOCK_MEMERR;
1295       return -1;
1296     }
1297   }
1298   err = _GAddress_translate_from(socket->m_peer, &from, fromlen);
1299   if (err != GSOCK_NOERROR)
1300   {
1301     GAddress_destroy(socket->m_peer);
1302     socket->m_peer  = NULL;
1303     socket->m_error = err;
1304     return -1;
1305   }
1306
1307   return ret;
1308 }
1309
1310 int _GSocket_Send_Stream(GSocket *socket, const char *buffer, int size)
1311 {
1312   int ret;
1313
1314 #ifndef __VISAGECPP__
1315   MASK_SIGNAL();
1316   ret = send(socket->m_fd, buffer, size, 0);
1317   UNMASK_SIGNAL();
1318 #else
1319   ret = send(socket->m_fd, (char *)buffer, size, 0);
1320 #endif
1321
1322   return ret;
1323 }
1324
1325 int _GSocket_Send_Dgram(GSocket *socket, const char *buffer, int size)
1326 {
1327   struct sockaddr *addr;
1328   int len, ret;
1329   GSocketError err;
1330
1331   if (!socket->m_peer)
1332   {
1333     socket->m_error = GSOCK_INVADDR;
1334     return -1;
1335   }
1336
1337   err = _GAddress_translate_to(socket->m_peer, &addr, &len);
1338   if (err != GSOCK_NOERROR)
1339   {
1340     socket->m_error = err;
1341     return -1;
1342   }
1343
1344 #ifndef __VISAGECPP__
1345   MASK_SIGNAL();
1346   ret = sendto(socket->m_fd, buffer, size, 0, addr, len);
1347   UNMASK_SIGNAL();
1348 #else
1349   ret = sendto(socket->m_fd, (char *)buffer, size, 0, addr, len);
1350 #endif
1351
1352   /* Frees memory allocated from _GAddress_translate_to */
1353   free(addr);
1354
1355   return ret;
1356 }
1357
1358 void _GSocket_Detected_Read(GSocket *socket)
1359 {
1360   char c;
1361
1362   /* If we have already detected a LOST event, then don't try
1363    * to do any further processing.
1364    */
1365   if ((socket->m_detected & GSOCK_LOST_FLAG) != 0)
1366   {
1367     socket->m_establishing = FALSE;
1368
1369     CALL_CALLBACK(socket, GSOCK_LOST);
1370     GSocket_Shutdown(socket);
1371     return;
1372   }
1373
1374   if (recv(socket->m_fd, &c, 1, MSG_PEEK) > 0)
1375   {
1376     CALL_CALLBACK(socket, GSOCK_INPUT);
1377   }
1378   else
1379   {
1380     if (socket->m_server && socket->m_stream)
1381     {
1382       CALL_CALLBACK(socket, GSOCK_CONNECTION);
1383     }
1384     else
1385     {
1386       CALL_CALLBACK(socket, GSOCK_LOST);
1387       GSocket_Shutdown(socket);
1388     }
1389   }
1390 }
1391
1392 void _GSocket_Detected_Write(GSocket *socket)
1393 {
1394   /* If we have already detected a LOST event, then don't try
1395    * to do any further processing.
1396    */
1397   if ((socket->m_detected & GSOCK_LOST_FLAG) != 0)
1398   {
1399     socket->m_establishing = FALSE;
1400
1401     CALL_CALLBACK(socket, GSOCK_LOST);
1402     GSocket_Shutdown(socket);
1403     return;
1404   }
1405
1406   if (socket->m_establishing && !socket->m_server)
1407   {
1408     int error;
1409     SOCKLEN_T len = sizeof(error);
1410
1411     socket->m_establishing = FALSE;
1412
1413     getsockopt(socket->m_fd, SOL_SOCKET, SO_ERROR, (void*)&error, &len);
1414
1415     if (error)
1416     {
1417       CALL_CALLBACK(socket, GSOCK_LOST);
1418       GSocket_Shutdown(socket);
1419     }
1420     else
1421     {
1422       CALL_CALLBACK(socket, GSOCK_CONNECTION);
1423       /* We have to fire this event by hand because CONNECTION (for clients)
1424        * and OUTPUT are internally the same and we just disabled CONNECTION
1425        * events with the above macro.
1426        */
1427       CALL_CALLBACK(socket, GSOCK_OUTPUT);
1428     }
1429   }
1430   else
1431   {
1432     CALL_CALLBACK(socket, GSOCK_OUTPUT);
1433   }
1434 }
1435
1436 /*
1437  * -------------------------------------------------------------------------
1438  * GAddress
1439  * -------------------------------------------------------------------------
1440  */
1441
1442 /* CHECK_ADDRESS verifies that the current address family is either
1443  * GSOCK_NOFAMILY or GSOCK_*family*, and if it is GSOCK_NOFAMILY, it
1444  * initalizes it to be a GSOCK_*family*. In other cases, it returns
1445  * an appropiate error code.
1446  *
1447  * CHECK_ADDRESS_RETVAL does the same but returning 'retval' on error.
1448  */
1449 #define CHECK_ADDRESS(address, family)                              \
1450 {                                                                   \
1451   if (address->m_family == GSOCK_NOFAMILY)                          \
1452     if (_GAddress_Init_##family(address) != GSOCK_NOERROR)          \
1453       return address->m_error;                                      \
1454   if (address->m_family != GSOCK_##family)                          \
1455   {                                                                 \
1456     address->m_error = GSOCK_INVADDR;                               \
1457     return GSOCK_INVADDR;                                           \
1458   }                                                                 \
1459 }
1460
1461 #define CHECK_ADDRESS_RETVAL(address, family, retval)               \
1462 {                                                                   \
1463   if (address->m_family == GSOCK_NOFAMILY)                          \
1464     if (_GAddress_Init_##family(address) != GSOCK_NOERROR)          \
1465       return retval;                                                \
1466   if (address->m_family != GSOCK_##family)                          \
1467   {                                                                 \
1468     address->m_error = GSOCK_INVADDR;                               \
1469     return retval;                                                  \
1470   }                                                                 \
1471 }
1472
1473
1474 GAddress *GAddress_new(void)
1475 {
1476   GAddress *address;
1477
1478   if ((address = (GAddress *) malloc(sizeof(GAddress))) == NULL)
1479     return NULL;
1480
1481   address->m_family  = GSOCK_NOFAMILY;
1482   address->m_addr    = NULL;
1483   address->m_len     = 0;
1484
1485   return address;
1486 }
1487
1488 GAddress *GAddress_copy(GAddress *address)
1489 {
1490   GAddress *addr2;
1491
1492   assert(address != NULL);
1493
1494   if ((addr2 = (GAddress *) malloc(sizeof(GAddress))) == NULL)
1495     return NULL;
1496
1497   memcpy(addr2, address, sizeof(GAddress));
1498
1499   if (address->m_addr && address->m_len > 0)
1500   {
1501     addr2->m_addr = (struct sockaddr *)malloc(addr2->m_len);
1502     if (addr2->m_addr == NULL)
1503     {
1504       free(addr2);
1505       return NULL;
1506     }
1507     memcpy(addr2->m_addr, address->m_addr, addr2->m_len);
1508   }
1509
1510   return addr2;
1511 }
1512
1513 void GAddress_destroy(GAddress *address)
1514 {
1515   assert(address != NULL);
1516
1517   if (address->m_addr)
1518     free(address->m_addr);
1519
1520   free(address);
1521 }
1522
1523 void GAddress_SetFamily(GAddress *address, GAddressType type)
1524 {
1525   assert(address != NULL);
1526
1527   address->m_family = type;
1528 }
1529
1530 GAddressType GAddress_GetFamily(GAddress *address)
1531 {
1532   assert(address != NULL);
1533
1534   return address->m_family;
1535 }
1536
1537 GSocketError _GAddress_translate_from(GAddress *address,
1538                                       struct sockaddr *addr, int len)
1539 {
1540   address->m_realfamily = addr->sa_family;
1541   switch (addr->sa_family)
1542   {
1543     case AF_INET:
1544       address->m_family = GSOCK_INET;
1545       break;
1546     case AF_UNIX:
1547       address->m_family = GSOCK_UNIX;
1548       break;
1549 #ifdef AF_INET6
1550     case AF_INET6:
1551       address->m_family = GSOCK_INET6;
1552       break;
1553 #endif
1554     default:
1555     {
1556       address->m_error = GSOCK_INVOP;
1557       return GSOCK_INVOP;
1558     }
1559   }
1560
1561   if (address->m_addr)
1562     free(address->m_addr);
1563
1564   address->m_len  = len;
1565   address->m_addr = (struct sockaddr *)malloc(len);
1566
1567   if (address->m_addr == NULL)
1568   {
1569     address->m_error = GSOCK_MEMERR;
1570     return GSOCK_MEMERR;
1571   }
1572   memcpy(address->m_addr, addr, len);
1573
1574   return GSOCK_NOERROR;
1575 }
1576
1577 GSocketError _GAddress_translate_to(GAddress *address,
1578                                     struct sockaddr **addr, int *len)
1579 {
1580   if (!address->m_addr)
1581   {
1582     address->m_error = GSOCK_INVADDR;
1583     return GSOCK_INVADDR;
1584   }
1585
1586   *len = address->m_len;
1587   *addr = (struct sockaddr *)malloc(address->m_len);
1588   if (*addr == NULL)
1589   {
1590     address->m_error = GSOCK_MEMERR;
1591     return GSOCK_MEMERR;
1592   }
1593
1594   memcpy(*addr, address->m_addr, address->m_len);
1595   return GSOCK_NOERROR;
1596 }
1597
1598 /*
1599  * -------------------------------------------------------------------------
1600  * Internet address family
1601  * -------------------------------------------------------------------------
1602  */
1603
1604 GSocketError _GAddress_Init_INET(GAddress *address)
1605 {
1606   address->m_len  = sizeof(struct sockaddr_in);
1607   address->m_addr = (struct sockaddr *) malloc(address->m_len);
1608   if (address->m_addr == NULL)
1609   {
1610     address->m_error = GSOCK_MEMERR;
1611     return GSOCK_MEMERR;
1612   }
1613
1614   address->m_family = GSOCK_INET;
1615   address->m_realfamily = PF_INET;
1616   ((struct sockaddr_in *)address->m_addr)->sin_family = AF_INET;
1617   ((struct sockaddr_in *)address->m_addr)->sin_addr.s_addr = INADDR_ANY;
1618
1619   return GSOCK_NOERROR;
1620 }
1621
1622 GSocketError GAddress_INET_SetHostName(GAddress *address, const char *hostname)
1623 {
1624   struct hostent *he;
1625   struct in_addr *addr;
1626
1627   assert(address != NULL);
1628
1629   CHECK_ADDRESS(address, INET);
1630
1631   addr = &(((struct sockaddr_in *)address->m_addr)->sin_addr);
1632
1633   /* If it is a numeric host name, convert it now */
1634 #if defined(HAVE_INET_ATON)
1635   if (inet_aton(hostname, addr) == 0)
1636   {
1637 #elif defined(HAVE_INET_ADDR)
1638   if ( (addr->s_addr = inet_addr(hostname)) == -1 )
1639   {
1640 #else
1641   /* Use gethostbyname by default */
1642 #ifndef __WXMAC__
1643   int val = 1;  /* VA doesn't like constants in conditional expressions */
1644   if (val)
1645 #endif
1646   {
1647 #endif
1648     struct in_addr *array_addr;
1649
1650     /* It is a real name, we solve it */
1651     if ((he = gethostbyname(hostname)) == NULL)
1652     {
1653       /* Reset to invalid address */
1654       addr->s_addr = INADDR_NONE;
1655       address->m_error = GSOCK_NOHOST;
1656       return GSOCK_NOHOST;
1657     }
1658     array_addr = (struct in_addr *) *(he->h_addr_list);
1659     addr->s_addr = array_addr[0].s_addr;
1660   }
1661   return GSOCK_NOERROR;
1662 }
1663
1664 GSocketError GAddress_INET_SetAnyAddress(GAddress *address)
1665 {
1666   return GAddress_INET_SetHostAddress(address, INADDR_ANY);
1667 }
1668
1669 GSocketError GAddress_INET_SetHostAddress(GAddress *address,
1670                                           unsigned long hostaddr)
1671 {
1672   struct in_addr *addr;
1673
1674   assert(address != NULL);
1675
1676   CHECK_ADDRESS(address, INET);
1677
1678   addr = &(((struct sockaddr_in *)address->m_addr)->sin_addr);
1679   addr->s_addr = htonl(hostaddr);
1680
1681   return GSOCK_NOERROR;
1682 }
1683
1684 GSocketError GAddress_INET_SetPortName(GAddress *address, const char *port,
1685                                        const char *protocol)
1686 {
1687   struct servent *se;
1688   struct sockaddr_in *addr;
1689
1690   assert(address != NULL);
1691   CHECK_ADDRESS(address, INET);
1692
1693   if (!port)
1694   {
1695     address->m_error = GSOCK_INVPORT;
1696     return GSOCK_INVPORT;
1697   }
1698
1699   se = getservbyname(port, protocol);
1700   if (!se)
1701   {
1702     /* the cast to int suppresses compiler warnings about subscript having the
1703        type char */
1704     if (isdigit((int)port[0]))
1705     {
1706       int port_int;
1707
1708       port_int = atoi(port);
1709       addr = (struct sockaddr_in *)address->m_addr;
1710       addr->sin_port = htons(port_int);
1711       return GSOCK_NOERROR;
1712     }
1713
1714     address->m_error = GSOCK_INVPORT;
1715     return GSOCK_INVPORT;
1716   }
1717
1718   addr = (struct sockaddr_in *)address->m_addr;
1719   addr->sin_port = se->s_port;
1720
1721   return GSOCK_NOERROR;
1722 }
1723
1724 GSocketError GAddress_INET_SetPort(GAddress *address, unsigned short port)
1725 {
1726   struct sockaddr_in *addr;
1727
1728   assert(address != NULL);
1729   CHECK_ADDRESS(address, INET);
1730
1731   addr = (struct sockaddr_in *)address->m_addr;
1732   addr->sin_port = htons(port);
1733
1734   return GSOCK_NOERROR;
1735 }
1736
1737 GSocketError GAddress_INET_GetHostName(GAddress *address, char *hostname, size_t sbuf)
1738 {
1739   struct hostent *he;
1740   char *addr_buf;
1741   struct sockaddr_in *addr;
1742
1743   assert(address != NULL);
1744   CHECK_ADDRESS(address, INET);
1745
1746   addr = (struct sockaddr_in *)address->m_addr;
1747   addr_buf = (char *)&(addr->sin_addr);
1748
1749   he = gethostbyaddr(addr_buf, sizeof(addr->sin_addr), AF_INET);
1750   if (he == NULL)
1751   {
1752     address->m_error = GSOCK_NOHOST;
1753     return GSOCK_NOHOST;
1754   }
1755
1756   strncpy(hostname, he->h_name, sbuf);
1757
1758   return GSOCK_NOERROR;
1759 }
1760
1761 unsigned long GAddress_INET_GetHostAddress(GAddress *address)
1762 {
1763   struct sockaddr_in *addr;
1764
1765   assert(address != NULL);
1766   CHECK_ADDRESS_RETVAL(address, INET, 0);
1767
1768   addr = (struct sockaddr_in *)address->m_addr;
1769
1770   return ntohl(addr->sin_addr.s_addr);
1771 }
1772
1773 unsigned short GAddress_INET_GetPort(GAddress *address)
1774 {
1775   struct sockaddr_in *addr;
1776
1777   assert(address != NULL);
1778   CHECK_ADDRESS_RETVAL(address, INET, 0);
1779
1780   addr = (struct sockaddr_in *)address->m_addr;
1781   return ntohs(addr->sin_port);
1782 }
1783
1784 /*
1785  * -------------------------------------------------------------------------
1786  * Unix address family
1787  * -------------------------------------------------------------------------
1788  */
1789
1790 #ifndef __VISAGECPP__
1791 GSocketError _GAddress_Init_UNIX(GAddress *address)
1792 {
1793   address->m_len  = sizeof(struct sockaddr_un);
1794   address->m_addr = (struct sockaddr *)malloc(address->m_len);
1795   if (address->m_addr == NULL)
1796   {
1797     address->m_error = GSOCK_MEMERR;
1798     return GSOCK_MEMERR;
1799   }
1800
1801   address->m_family = GSOCK_UNIX;
1802   address->m_realfamily = PF_UNIX;
1803   ((struct sockaddr_un *)address->m_addr)->sun_family = AF_UNIX;
1804   ((struct sockaddr_un *)address->m_addr)->sun_path[0] = 0;
1805
1806   return GSOCK_NOERROR;
1807 }
1808
1809 #define UNIX_SOCK_PATHLEN (sizeof(addr->sun_path)/sizeof(addr->sun_path[0]))
1810
1811 GSocketError GAddress_UNIX_SetPath(GAddress *address, const char *path)
1812 {
1813   struct sockaddr_un *addr;
1814
1815   assert(address != NULL);
1816
1817   CHECK_ADDRESS(address, UNIX);
1818
1819   addr = ((struct sockaddr_un *)address->m_addr);
1820   strncpy(addr->sun_path, path, UNIX_SOCK_PATHLEN);
1821   addr->sun_path[UNIX_SOCK_PATHLEN - 1] = '\0';
1822
1823   return GSOCK_NOERROR;
1824 }
1825
1826 GSocketError GAddress_UNIX_GetPath(GAddress *address, char *path, size_t sbuf)
1827 {
1828   struct sockaddr_un *addr;
1829
1830   assert(address != NULL);
1831   CHECK_ADDRESS(address, UNIX);
1832
1833   addr = (struct sockaddr_un *)address->m_addr;
1834
1835   strncpy(path, addr->sun_path, sbuf);
1836
1837   return GSOCK_NOERROR;
1838 }
1839 #endif  /* !defined(__VISAGECPP__) */
1840 #endif  /* wxUSE_SOCKETS || defined(__GSOCKET_STANDALONE__) */
1841