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   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   connection->m_oriented = TRUE;
 575
 576   /* Setup the peer address field */
 577   connection->m_peer = GAddress_new();
 578   if (!connection->m_peer)
 579   {
 580     GSocket_destroy(connection);
 581     socket->m_error = GSOCK_MEMERR;
 582     return NULL;
 583   }
 584   err = _GAddress_translate_from(connection->m_peer, &from, fromlen);
 585   if (err != GSOCK_NOERROR)
 586   {
 587     GAddress_destroy(connection->m_peer);
 588     GSocket_destroy(connection);
 589     socket->m_error = err;
 590     return NULL;
 591   }
 592 #if defined(__EMX__) || defined(__VISAGECPP__)
 593   ioctl(connection->m_fd, FIONBIO, (char*)&arg, sizeof(arg));
 594 #else
 595   ioctl(connection->m_fd, FIONBIO, &arg);
 596 #endif
 597   _GSocket_Enable_Events(connection);
 598
 599   return connection;
 600 }
 601
 602 /* Client specific parts */
 603
 604 /* GSocket_Connect:
 605  *  For stream (connection oriented) sockets, GSocket_Connect() tries
 606  *  to establish a client connection to a server using the peer address
 607  *  as established with GSocket_SetPeer(). Returns GSOCK_NOERROR if the
 608  *  connection has been succesfully established, or one of the error
 609  *  codes listed below. Note that for nonblocking sockets, a return
 610  *  value of GSOCK_WOULDBLOCK doesn't mean a failure. The connection
 611  *  request can be completed later; you should use GSocket_Select()
 612  *  to poll for GSOCK_CONNECTION | GSOCK_LOST, or wait for the
 613  *  corresponding asynchronous events.
 614  *
 615  *  For datagram (non connection oriented) sockets, GSocket_Connect()
 616  *  just sets the peer address established with GSocket_SetPeer() as
 617  *  default destination.
 618  *
 619  *  Error codes:
 620  *    GSOCK_INVSOCK    - the socket is in use or not valid.
 621  *    GSOCK_INVADDR    - the peer address has not been established.
 622  *    GSOCK_TIMEDOUT   - timeout, the connection failed.
 623  *    GSOCK_WOULDBLOCK - connection in progress (nonblocking sockets only)
 624  *    GSOCK_MEMERR     - couldn't allocate memory.
 625  *    GSOCK_IOERR      - low-level error.
 626  */
 627 GSocketError GSocket_Connect(GSocket *sck, GSocketStream stream)
 628 {
 629   int err, ret;
 630   int arg = 1;
 631
 632   assert(sck != NULL);
 633
 634   /* Enable CONNECTION events (needed for nonblocking connections) */
 635   _GSocket_Enable(sck, GSOCK_CONNECTION);
 636
 637   if (sck->m_fd != INVALID_SOCKET)
 638   {
 639     sck->m_error = GSOCK_INVSOCK;
 640     return GSOCK_INVSOCK;
 641   }
 642
 643   if (!sck->m_peer)
 644   {
 645     sck->m_error = GSOCK_INVADDR;
 646     return GSOCK_INVADDR;
 647   }
 648
 649   /* Streamed or dgram socket? */
 650   sck->m_stream   = (stream == GSOCK_STREAMED);
 651   sck->m_oriented = TRUE;
 652   sck->m_server   = FALSE;
 653   sck->m_establishing = FALSE;
 654
 655   /* Create the socket */
 656   sck->m_fd = socket(sck->m_peer->m_realfamily,
 657                      sck->m_stream? SOCK_STREAM : SOCK_DGRAM, 0);
 658
 659   if (sck->m_fd == INVALID_SOCKET)
 660   {
 661     sck->m_error = GSOCK_IOERR;
 662     return GSOCK_IOERR;
 663   }
 664 #if defined(__EMX__) || defined(__VISAGECPP__)
 665   ioctl(sck->m_fd, FIONBIO, (char*)&arg, sizeof(arg));
 666 #else
 667   ioctl(sck->m_fd, FIONBIO, &arg);
 668 #endif
 669   _GSocket_Enable_Events(sck);
 670
 671   /* Connect it to the peer address, with a timeout (see below) */
 672   ret = connect(sck->m_fd, sck->m_peer->m_addr, sck->m_peer->m_len);
 673
 674   if (ret == -1)
 675   {
 676     err = errno;
 677
 678     /* If connect failed with EINPROGRESS and the GSocket object
 679      * is in blocking mode, we select() for the specified timeout
 680      * checking for writability to see if the connection request
 681      * completes.
 682      */
 683     if ((err == EINPROGRESS) && (!sck->m_non_blocking))
 684     {
 685       if (_GSocket_Output_Timeout(sck) == GSOCK_TIMEDOUT)
 686       {
 687         GSocket_close(sck);
 688         /* sck->m_error is set in _GSocket_Output_Timeout */
 689         return GSOCK_TIMEDOUT;
 690       }
 691       else
 692       {
 693         int error;
 694         SOCKLEN_T len = sizeof(error);
 695
 696         getsockopt(sck->m_fd, SOL_SOCKET, SO_ERROR, (void*) &error, &len);
 697
 698         if (!error)
 699           return GSOCK_NOERROR;
 700       }
 701     }
 702
 703     /* If connect failed with EINPROGRESS and the GSocket object
 704      * is set to nonblocking, we set m_error to GSOCK_WOULDBLOCK
 705      * (and return GSOCK_WOULDBLOCK) but we don't close the socket;
 706      * this way if the connection completes, a GSOCK_CONNECTION
 707      * event will be generated, if enabled.
 708      */
 709     if ((err == EINPROGRESS) && (sck->m_non_blocking))
 710     {
 711       sck->m_establishing = TRUE;
 712       sck->m_error = GSOCK_WOULDBLOCK;
 713       return GSOCK_WOULDBLOCK;
 714     }
 715
 716     /* If connect failed with an error other than EINPROGRESS,
 717      * then the call to GSocket_Connect has failed.
 718      */
 719     GSocket_close(sck);
 720     sck->m_error = GSOCK_IOERR;
 721     return GSOCK_IOERR;
 722   }
 723
 724   return GSOCK_NOERROR;
 725 }
 726
 727 /* Datagram sockets */
 728
 729 /* GSocket_SetNonOriented:
 730  *  Sets up this socket as a non-connection oriented (datagram) socket.
 731  *  Before using this function, the local address must have been set
 732  *  with GSocket_SetLocal(), or the call will fail. Returns GSOCK_NOERROR
 733  *  on success, or one of the following otherwise.
 734  *
 735  *  Error codes:
 736  *    GSOCK_INVSOCK - the socket is in use.
 737  *    GSOCK_INVADDR - the local address has not been set.
 738  *    GSOCK_IOERR   - low-level error.
 739  */
 740 GSocketError GSocket_SetNonOriented(GSocket *sck)
 741 {
 742   int arg = 1;
 743
 744   assert(sck != NULL);
 745
 746   if (sck->m_fd != INVALID_SOCKET)
 747   {
 748     sck->m_error = GSOCK_INVSOCK;
 749     return GSOCK_INVSOCK;
 750   }
 751
 752   if (!sck->m_local)
 753   {
 754     sck->m_error = GSOCK_INVADDR;
 755     return GSOCK_INVADDR;
 756   }
 757
 758   /* Initialize all fields */
 759   sck->m_stream   = FALSE;
 760   sck->m_server   = FALSE;
 761   sck->m_oriented = FALSE;
 762
 763   /* Create the socket */
 764   sck->m_fd = socket(sck->m_local->m_realfamily, SOCK_DGRAM, 0);
 765
 766   if (sck->m_fd == INVALID_SOCKET)
 767   {
 768     sck->m_error = GSOCK_IOERR;
 769     return GSOCK_IOERR;
 770   }
 771 #if defined(__EMX__) || defined(__VISAGECPP__)
 772   ioctl(sck->m_fd, FIONBIO, (char*)&arg, sizeof(arg));
 773 #else
 774   ioctl(sck->m_fd, FIONBIO, &arg);
 775 #endif
 776   _GSocket_Enable_Events(sck);
 777
 778   /* Bind to the local address,
 779    * and retrieve the actual address bound.
 780    */
 781   if ((bind(sck->m_fd, sck->m_local->m_addr, sck->m_local->m_len) != 0) ||
 782       (getsockname(sck->m_fd,
 783                    sck->m_local->m_addr,
 784                    (SOCKLEN_T *) &sck->m_local->m_len) != 0))
 785   {
 786     GSocket_close(sck);
 787     sck->m_error = GSOCK_IOERR;
 788     return GSOCK_IOERR;
 789   }
 790
 791   return GSOCK_NOERROR;
 792 }
 793
 794 /* Generic IO */
 795
 796 /* Like recv(), send(), ... */
 797 int GSocket_Read(GSocket *socket, char *buffer, int size)
 798 {
 799   int ret;
 800
 801   assert(socket != NULL);
 802
 803   if (socket->m_fd == INVALID_SOCKET || socket->m_server)
 804   {
 805     socket->m_error = GSOCK_INVSOCK;
 806     return -1;
 807   }
 808
 809   /* Disable events during query of socket status */
 810   _GSocket_Disable(socket, GSOCK_INPUT);
 811
 812   /* If the socket is blocking, wait for data (with a timeout) */
 813   if (_GSocket_Input_Timeout(socket) == GSOCK_TIMEDOUT)
 814     /* We no longer return here immediately, otherwise socket events would not be re-enabled! */
 815     ret = -1;
 816   else {
 817     /* Read the data */
 818     if (socket->m_stream)
 819       ret = _GSocket_Recv_Stream(socket, buffer, size);
 820     else
 821       ret = _GSocket_Recv_Dgram(socket, buffer, size);
 822   }
 823
 824   if (ret == -1)
 825   {
 826     if (errno == EWOULDBLOCK)
 827       socket->m_error = GSOCK_WOULDBLOCK;
 828     else
 829       socket->m_error = GSOCK_IOERR;
 830   }
 831
 832   /* Enable events again now that we are done processing */
 833   _GSocket_Enable(socket, GSOCK_INPUT);
 834
 835   return ret;
 836 }
 837
 838 int GSocket_Write(GSocket *socket, const char *buffer, int size)
 839 {
 840   int ret;
 841
 842   assert(socket != NULL);
 843
 844   GSocket_Debug(( "GSocket_Write #1, size %d\n", size ));
 845
 846   if (socket->m_fd == INVALID_SOCKET || socket->m_server)
 847   {
 848     socket->m_error = GSOCK_INVSOCK;
 849     return -1;
 850   }
 851
 852   GSocket_Debug(( "GSocket_Write #2, size %d\n", size ));
 853
 854   /* If the socket is blocking, wait for writability (with a timeout) */
 855   if (_GSocket_Output_Timeout(socket) == GSOCK_TIMEDOUT)
 856     return -1;
 857
 858   GSocket_Debug(( "GSocket_Write #3, size %d\n", size ));
 859
 860   /* Write the data */
 861   if (socket->m_stream)
 862     ret = _GSocket_Send_Stream(socket, buffer, size);
 863   else
 864     ret = _GSocket_Send_Dgram(socket, buffer, size);
 865
 866   GSocket_Debug(( "GSocket_Write #4, size %d\n", size ));
 867
 868   if (ret == -1)
 869   {
 870     if (errno == EWOULDBLOCK)
 871     {
 872       socket->m_error = GSOCK_WOULDBLOCK;
 873       GSocket_Debug(( "GSocket_Write error WOULDBLOCK\n" ));
 874     }
 875     else
 876     {
 877       socket->m_error = GSOCK_IOERR;
 878       GSocket_Debug(( "GSocket_Write error IOERR\n" ));
 879     }
 880
 881     /* Only reenable OUTPUT events after an error (just like WSAAsyncSelect
 882      * in MSW). Once the first OUTPUT event is received, users can assume
 883      * that the socket is writable until a read operation fails. Only then
 884      * will further OUTPUT events be posted.
 885      */
 886     _GSocket_Enable(socket, GSOCK_OUTPUT);
 887     return -1;
 888   }
 889
 890   GSocket_Debug(( "GSocket_Write #5, size %d ret %d\n", size, ret ));
 891
 892   return ret;
 893 }
 894
 895 /* GSocket_Select:
 896  *  Polls the socket to determine its status. This function will
 897  *  check for the events specified in the 'flags' parameter, and
 898  *  it will return a mask indicating which operations can be
 899  *  performed. This function won't block, regardless of the
 900  *  mode (blocking | nonblocking) of the socket.
 901  */
 902 GSocketEventFlags GSocket_Select(GSocket *socket, GSocketEventFlags flags)
 903 {
 904   if (!USE_GUI())
 905   {
 906
 907     GSocketEventFlags result = 0;
 908     fd_set readfds;
 909     fd_set writefds;
 910     fd_set exceptfds;
 911     struct timeval tv;
 912
 913     assert(socket != NULL);
 914
 915     /* Do not use a static struct, Linux can garble it */
 916     tv.tv_sec = socket->m_timeout / 1000;
 917     tv.tv_usec = (socket->m_timeout % 1000) / 1000;
 918
 919     FD_ZERO(&readfds);
 920     FD_ZERO(&writefds);
 921     FD_ZERO(&exceptfds);
 922     FD_SET(socket->m_fd, &readfds);
 923     if (flags & GSOCK_OUTPUT_FLAG || flags & GSOCK_CONNECTION_FLAG)
 924       FD_SET(socket->m_fd, &writefds);
 925     FD_SET(socket->m_fd, &exceptfds);
 926
 927     /* Check 'sticky' CONNECTION flag first */
 928     result |= (GSOCK_CONNECTION_FLAG & socket->m_detected);
 929
 930     /* If we have already detected a LOST event, then don't try
 931      * to do any further processing.
 932      */
 933     if ((socket->m_detected & GSOCK_LOST_FLAG) != 0)
 934     {
 935       socket->m_establishing = FALSE;
 936
 937       return (GSOCK_LOST_FLAG & flags);
 938     }
 939
 940     /* Try select now */
 941     if (select(socket->m_fd + 1, &readfds, &writefds, &exceptfds, &tv) <= 0)
 942     {
 943       /* What to do here? */
 944       return (result & flags);
 945     }
 946
 947     /* Check for readability */
 948     if (FD_ISSET(socket->m_fd, &readfds))
 949     {
 950       char c;
 951
 952       if (recv(socket->m_fd, &c, 1, MSG_PEEK) > 0)
 953       {
 954         result |= GSOCK_INPUT_FLAG;
 955       }
 956       else
 957       {
 958         if (socket->m_server && socket->m_stream)
 959         {
 960           result |= GSOCK_CONNECTION_FLAG;
 961           socket->m_detected |= GSOCK_CONNECTION_FLAG;
 962         }
 963         else
 964         {
 965           socket->m_detected = GSOCK_LOST_FLAG;
 966           socket->m_establishing = FALSE;
 967
 968           /* LOST event: Abort any further processing */
 969           return (GSOCK_LOST_FLAG & flags);
 970         }
 971       }
 972     }
 973
 974     /* Check for writability */
 975     if (FD_ISSET(socket->m_fd, &writefds))
 976     {
 977       if (socket->m_establishing && !socket->m_server)
 978       {
 979         int error;
 980         SOCKLEN_T len = sizeof(error);
 981
 982         socket->m_establishing = FALSE;
 983
 984         getsockopt(socket->m_fd, SOL_SOCKET, SO_ERROR, (void*)&error, &len);
 985
 986         if (error)
 987         {
 988           socket->m_detected = GSOCK_LOST_FLAG;
 989
 990           /* LOST event: Abort any further processing */
 991           return (GSOCK_LOST_FLAG & flags);
 992         }
 993         else
 994         {
 995           result |= GSOCK_CONNECTION_FLAG;
 996           socket->m_detected |= GSOCK_CONNECTION_FLAG;
 997         }
 998       }
 999       else
1000       {
1001         result |= GSOCK_OUTPUT_FLAG;
1002       }
1003     }
1004
1005     /* Check for exceptions and errors (is this useful in Unices?) */
1006     if (FD_ISSET(socket->m_fd, &exceptfds))
1007     {
1008       socket->m_establishing = FALSE;
1009       socket->m_detected = GSOCK_LOST_FLAG;
1010
1011       /* LOST event: Abort any further processing */
1012       return (GSOCK_LOST_FLAG & flags);
1013     }
1014
1015     return (result & flags);
1016
1017   }
1018   else
1019   {
1020
1021     assert(socket != NULL);
1022     return flags & socket->m_detected;
1023
1024   }
1025 }
1026
1027 /* Flags */
1028
1029 /* GSocket_SetNonBlocking:
1030  *  Sets the socket to non-blocking mode. All IO calls will return
1031  *  immediately.
1032  */
1033 void GSocket_SetNonBlocking(GSocket *socket, int non_block)
1034 {
1035   assert(socket != NULL);
1036
1037   GSocket_Debug( ("GSocket_SetNonBlocking: %d\n", (int)non_block) );
1038
1039   socket->m_non_blocking = non_block;
1040 }
1041
1042 /* GSocket_SetTimeout:
1043  *  Sets the timeout for blocking calls. Time is expressed in
1044  *  milliseconds.
1045  */
1046 void GSocket_SetTimeout(GSocket *socket, unsigned long millisec)
1047 {
1048   assert(socket != NULL);
1049
1050   socket->m_timeout = millisec;
1051 }
1052
1053 /* GSocket_GetError:
1054  *  Returns the last error occured for this socket. Note that successful
1055  *  operations do not clear this back to GSOCK_NOERROR, so use it only
1056  *  after an error.
1057  */
1058 GSocketError GSocket_GetError(GSocket *socket)
1059 {
1060   assert(socket != NULL);
1061
1062   return socket->m_error;
1063 }
1064
1065 /* Callbacks */
1066
1067 /* GSOCK_INPUT:
1068  *   There is data to be read in the input buffer. If, after a read
1069  *   operation, there is still data available, the callback function will
1070  *   be called again.
1071  * GSOCK_OUTPUT:
1072  *   The socket is available for writing. That is, the next write call
1073  *   won't block. This event is generated only once, when the connection is
1074  *   first established, and then only if a call failed with GSOCK_WOULDBLOCK,
1075  *   when the output buffer empties again. This means that the app should
1076  *   assume that it can write since the first OUTPUT event, and no more
1077  *   OUTPUT events will be generated unless an error occurs.
1078  * GSOCK_CONNECTION:
1079  *   Connection succesfully established, for client sockets, or incoming
1080  *   client connection, for server sockets. Wait for this event (also watch
1081  *   out for GSOCK_LOST) after you issue a nonblocking GSocket_Connect() call.
1082  * GSOCK_LOST:
1083  *   The connection is lost (or a connection request failed); this could
1084  *   be due to a failure, or due to the peer closing it gracefully.
1085  */
1086
1087 /* GSocket_SetCallback:
1088  *  Enables the callbacks specified by 'flags'. Note that 'flags'
1089  *  may be a combination of flags OR'ed toghether, so the same
1090  *  callback function can be made to accept different events.
1091  *  The callback function must have the following prototype:
1092  *
1093  *  void function(GSocket *socket, GSocketEvent event, char *cdata)
1094  */
1095 void GSocket_SetCallback(GSocket *socket, GSocketEventFlags flags,
1096                          GSocketCallback callback, char *cdata)
1097 {
1098   int count;
1099
1100   assert(socket != NULL);
1101
1102   for (count = 0; count < GSOCK_MAX_EVENT; count++)
1103   {
1104     if ((flags & (1 << count)) != 0)
1105     {
1106       socket->m_cbacks[count] = callback;
1107       socket->m_data[count] = cdata;
1108     }
1109   }
1110 }
1111
1112 /* GSocket_UnsetCallback:
1113  *  Disables all callbacks specified by 'flags', which may be a
1114  *  combination of flags OR'ed toghether.
1115  */
1116 void GSocket_UnsetCallback(GSocket *socket, GSocketEventFlags flags)
1117 {
1118   int count;
1119
1120   assert(socket != NULL);
1121
1122   for (count = 0; count < GSOCK_MAX_EVENT; count++)
1123   {
1124     if ((flags & (1 << count)) != 0)
1125     {
1126       socket->m_cbacks[count] = NULL;
1127       socket->m_data[count] = NULL;
1128     }
1129   }
1130 }
1131
1132 GSocketError GSocket_GetSockOpt(GSocket *socket, int level, int optname,
1133                                 void *optval, int *optlen)
1134 {
1135     if (getsockopt(socket->m_fd, level, optname, optval, optlen) == 0)
1136     {
1137         return GSOCK_NOERROR;
1138     }
1139     return GSOCK_OPTERR;
1140 }
1141
1142 GSocketError GSocket_SetSockOpt(GSocket *socket, int level, int optname,
1143                                 const void *optval, int optlen)
1144 {
1145     if (setsockopt(socket->m_fd, level, optname, optval, optlen) == 0)
1146     {
1147         return GSOCK_NOERROR;
1148     }
1149     return GSOCK_OPTERR;
1150 }
1151
1152 void GSocket_Streamed(GSocket *socket)
1153 {
1154     socket->m_stream = TRUE;
1155 }
1156
1157 void GSocket_Unstreamed(GSocket *socket)
1158 {
1159     socket->m_stream = FALSE;
1160 }
1161
1162 #define CALL_CALLBACK(socket, event) {                                  \
1163   _GSocket_Disable(socket, event);                                      \
1164   if (socket->m_cbacks[event])                                          \
1165     socket->m_cbacks[event](socket, event, socket->m_data[event]);      \
1166 }
1167
1168
1169 void _GSocket_Enable(GSocket *socket, GSocketEvent event)
1170 {
1171   socket->m_detected &= ~(1 << event);
1172   _GSocket_Install_Callback(socket, event);
1173 }
1174
1175 void _GSocket_Disable(GSocket *socket, GSocketEvent event)
1176 {
1177   socket->m_detected |= (1 << event);
1178   _GSocket_Uninstall_Callback(socket, event);
1179 }
1180
1181 /* _GSocket_Input_Timeout:
1182  *  For blocking sockets, wait until data is available or
1183  *  until timeout ellapses.
1184  */
1185 GSocketError _GSocket_Input_Timeout(GSocket *socket)
1186 {
1187   struct timeval tv;
1188   fd_set readfds;
1189   int ret;
1190
1191   /* Linux select() will overwrite the struct on return */
1192   tv.tv_sec  = (socket->m_timeout / 1000);
1193   tv.tv_usec = (socket->m_timeout % 1000) * 1000;
1194
1195   if (!socket->m_non_blocking)
1196   {
1197     FD_ZERO(&readfds);
1198     FD_SET(socket->m_fd, &readfds);
1199     ret = select(socket->m_fd + 1, &readfds, NULL, NULL, &tv);
1200     if (ret == 0)
1201     {
1202       GSocket_Debug(( "GSocket_Input_Timeout, select returned 0\n" ));
1203       socket->m_error = GSOCK_TIMEDOUT;
1204       return GSOCK_TIMEDOUT;
1205     }
1206     if (ret == -1)
1207     {
1208       GSocket_Debug(( "GSocket_Input_Timeout, select returned -1\n" ));
1209       if (errno == EBADF) { GSocket_Debug(( "Invalid file descriptor\n" )); }
1210       if (errno == EINTR) { GSocket_Debug(( "A non blocked signal was caught\n" )); }
1211       if (errno == EINVAL) { GSocket_Debug(( "The highest number descriptor is negative\n" )); }
1212       if (errno == ENOMEM) { GSocket_Debug(( "Not enough memory\n" )); }
1213       socket->m_error = GSOCK_TIMEDOUT;
1214       return GSOCK_TIMEDOUT;
1215     }
1216   }
1217   return GSOCK_NOERROR;
1218 }
1219
1220 /* _GSocket_Output_Timeout:
1221  *  For blocking sockets, wait until data can be sent without
1222  *  blocking or until timeout ellapses.
1223  */
1224 GSocketError _GSocket_Output_Timeout(GSocket *socket)
1225 {
1226   struct timeval tv;
1227   fd_set writefds;
1228   int ret;
1229
1230   /* Linux select() will overwrite the struct on return */
1231   tv.tv_sec  = (socket->m_timeout / 1000);
1232   tv.tv_usec = (socket->m_timeout % 1000) * 1000;
1233
1234   GSocket_Debug( ("m_non_blocking has: %d\n", (int)socket->m_non_blocking) );
1235
1236   if (!socket->m_non_blocking)
1237   {
1238     FD_ZERO(&writefds);
1239     FD_SET(socket->m_fd, &writefds);
1240     ret = select(socket->m_fd + 1, NULL, &writefds, NULL, &tv);
1241     if (ret == 0)
1242     {
1243       GSocket_Debug(( "GSocket_Output_Timeout, select returned 0\n" ));
1244       socket->m_error = GSOCK_TIMEDOUT;
1245       return GSOCK_TIMEDOUT;
1246     }
1247     if (ret == -1)
1248     {
1249       GSocket_Debug(( "GSocket_Output_Timeout, select returned -1\n" ));
1250       if (errno == EBADF) { GSocket_Debug(( "Invalid file descriptor\n" )); }
1251       if (errno == EINTR) { GSocket_Debug(( "A non blocked signal was caught\n" )); }
1252       if (errno == EINVAL) { GSocket_Debug(( "The highest number descriptor is negative\n" )); }
1253       if (errno == ENOMEM) { GSocket_Debug(( "Not enough memory\n" )); }
1254       socket->m_error = GSOCK_TIMEDOUT;
1255       return GSOCK_TIMEDOUT;
1256     }
1257     if ( ! FD_ISSET(socket->m_fd, &writefds) ) {
1258         GSocket_Debug(( "GSocket_Output_Timeout is buggy!\n" ));
1259     }
1260     else {
1261         GSocket_Debug(( "GSocket_Output_Timeout seems correct\n" ));
1262     }
1263   }
1264   else
1265   {
1266     GSocket_Debug(( "GSocket_Output_Timeout, didn't try select!\n" ));
1267   }
1268
1269   return GSOCK_NOERROR;
1270 }
1271
1272 int _GSocket_Recv_Stream(GSocket *socket, char *buffer, int size)
1273 {
1274   return recv(socket->m_fd, buffer, size, 0);
1275 }
1276
1277 int _GSocket_Recv_Dgram(GSocket *socket, char *buffer, int size)
1278 {
1279   struct sockaddr from;
1280   SOCKLEN_T fromlen = sizeof(from);
1281   int ret;
1282   GSocketError err;
1283
1284   fromlen = sizeof(from);
1285
1286   ret = recvfrom(socket->m_fd, buffer, size, 0, &from, (SOCKLEN_T *) &fromlen);
1287
1288   if (ret == -1)
1289     return -1;
1290
1291   /* Translate a system address into a GSocket address */
1292   if (!socket->m_peer)
1293   {
1294     socket->m_peer = GAddress_new();
1295     if (!socket->m_peer)
1296     {
1297       socket->m_error = GSOCK_MEMERR;
1298       return -1;
1299     }
1300   }
1301   err = _GAddress_translate_from(socket->m_peer, &from, fromlen);
1302   if (err != GSOCK_NOERROR)
1303   {
1304     GAddress_destroy(socket->m_peer);
1305     socket->m_peer  = NULL;
1306     socket->m_error = err;
1307     return -1;
1308   }
1309
1310   return ret;
1311 }
1312
1313 int _GSocket_Send_Stream(GSocket *socket, const char *buffer, int size)
1314 {
1315   int ret;
1316
1317 #ifndef __VISAGECPP__
1318   MASK_SIGNAL();
1319   ret = send(socket->m_fd, buffer, size, 0);
1320   UNMASK_SIGNAL();
1321 #else
1322   ret = send(socket->m_fd, (char *)buffer, size, 0);
1323 #endif
1324
1325   return ret;
1326 }
1327
1328 int _GSocket_Send_Dgram(GSocket *socket, const char *buffer, int size)
1329 {
1330   struct sockaddr *addr;
1331   int len, ret;
1332   GSocketError err;
1333
1334   if (!socket->m_peer)
1335   {
1336     socket->m_error = GSOCK_INVADDR;
1337     return -1;
1338   }
1339
1340   err = _GAddress_translate_to(socket->m_peer, &addr, &len);
1341   if (err != GSOCK_NOERROR)
1342   {
1343     socket->m_error = err;
1344     return -1;
1345   }
1346
1347 #ifndef __VISAGECPP__
1348   MASK_SIGNAL();
1349   ret = sendto(socket->m_fd, buffer, size, 0, addr, len);
1350   UNMASK_SIGNAL();
1351 #else
1352   ret = sendto(socket->m_fd, (char *)buffer, size, 0, addr, len);
1353 #endif
1354
1355   /* Frees memory allocated from _GAddress_translate_to */
1356   free(addr);
1357
1358   return ret;
1359 }
1360
1361 void _GSocket_Detected_Read(GSocket *socket)
1362 {
1363   char c;
1364
1365   /* If we have already detected a LOST event, then don't try
1366    * to do any further processing.
1367    */
1368   if ((socket->m_detected & GSOCK_LOST_FLAG) != 0)
1369   {
1370     socket->m_establishing = FALSE;
1371
1372     CALL_CALLBACK(socket, GSOCK_LOST);
1373     GSocket_Shutdown(socket);
1374     return;
1375   }
1376
1377   if (recv(socket->m_fd, &c, 1, MSG_PEEK) > 0)
1378   {
1379     CALL_CALLBACK(socket, GSOCK_INPUT);
1380   }
1381   else
1382   {
1383     if (socket->m_server && socket->m_stream)
1384     {
1385       CALL_CALLBACK(socket, GSOCK_CONNECTION);
1386     }
1387     else
1388     {
1389       CALL_CALLBACK(socket, GSOCK_LOST);
1390       GSocket_Shutdown(socket);
1391     }
1392   }
1393 }
1394
1395 void _GSocket_Detected_Write(GSocket *socket)
1396 {
1397   /* If we have already detected a LOST event, then don't try
1398    * to do any further processing.
1399    */
1400   if ((socket->m_detected & GSOCK_LOST_FLAG) != 0)
1401   {
1402     socket->m_establishing = FALSE;
1403
1404     CALL_CALLBACK(socket, GSOCK_LOST);
1405     GSocket_Shutdown(socket);
1406     return;
1407   }
1408
1409   if (socket->m_establishing && !socket->m_server)
1410   {
1411     int error;
1412     SOCKLEN_T len = sizeof(error);
1413
1414     socket->m_establishing = FALSE;
1415
1416     getsockopt(socket->m_fd, SOL_SOCKET, SO_ERROR, (void*)&error, &len);
1417
1418     if (error)
1419     {
1420       CALL_CALLBACK(socket, GSOCK_LOST);
1421       GSocket_Shutdown(socket);
1422     }
1423     else
1424     {
1425       CALL_CALLBACK(socket, GSOCK_CONNECTION);
1426       /* We have to fire this event by hand because CONNECTION (for clients)
1427        * and OUTPUT are internally the same and we just disabled CONNECTION
1428        * events with the above macro.
1429        */
1430       CALL_CALLBACK(socket, GSOCK_OUTPUT);
1431     }
1432   }
1433   else
1434   {
1435     CALL_CALLBACK(socket, GSOCK_OUTPUT);
1436   }
1437 }
1438
1439 /*
1440  * -------------------------------------------------------------------------
1441  * GAddress
1442  * -------------------------------------------------------------------------
1443  */
1444
1445 /* CHECK_ADDRESS verifies that the current address family is either
1446  * GSOCK_NOFAMILY or GSOCK_*family*, and if it is GSOCK_NOFAMILY, it
1447  * initalizes it to be a GSOCK_*family*. In other cases, it returns
1448  * an appropiate error code.
1449  *
1450  * CHECK_ADDRESS_RETVAL does the same but returning 'retval' on error.
1451  */
1452 #define CHECK_ADDRESS(address, family)                              \
1453 {                                                                   \
1454   if (address->m_family == GSOCK_NOFAMILY)                          \
1455     if (_GAddress_Init_##family(address) != GSOCK_NOERROR)          \
1456       return address->m_error;                                      \
1457   if (address->m_family != GSOCK_##family)                          \
1458   {                                                                 \
1459     address->m_error = GSOCK_INVADDR;                               \
1460     return GSOCK_INVADDR;                                           \
1461   }                                                                 \
1462 }
1463
1464 #define CHECK_ADDRESS_RETVAL(address, family, retval)               \
1465 {                                                                   \
1466   if (address->m_family == GSOCK_NOFAMILY)                          \
1467     if (_GAddress_Init_##family(address) != GSOCK_NOERROR)          \
1468       return retval;                                                \
1469   if (address->m_family != GSOCK_##family)                          \
1470   {                                                                 \
1471     address->m_error = GSOCK_INVADDR;                               \
1472     return retval;                                                  \
1473   }                                                                 \
1474 }
1475
1476
1477 GAddress *GAddress_new(void)
1478 {
1479   GAddress *address;
1480
1481   if ((address = (GAddress *) malloc(sizeof(GAddress))) == NULL)
1482     return NULL;
1483
1484   address->m_family  = GSOCK_NOFAMILY;
1485   address->m_addr    = NULL;
1486   address->m_len     = 0;
1487
1488   return address;
1489 }
1490
1491 GAddress *GAddress_copy(GAddress *address)
1492 {
1493   GAddress *addr2;
1494
1495   assert(address != NULL);
1496
1497   if ((addr2 = (GAddress *) malloc(sizeof(GAddress))) == NULL)
1498     return NULL;
1499
1500   memcpy(addr2, address, sizeof(GAddress));
1501
1502   if (address->m_addr && address->m_len > 0)
1503   {
1504     addr2->m_addr = (struct sockaddr *)malloc(addr2->m_len);
1505     if (addr2->m_addr == NULL)
1506     {
1507       free(addr2);
1508       return NULL;
1509     }
1510     memcpy(addr2->m_addr, address->m_addr, addr2->m_len);
1511   }
1512
1513   return addr2;
1514 }
1515
1516 void GAddress_destroy(GAddress *address)
1517 {
1518   assert(address != NULL);
1519
1520   if (address->m_addr)
1521     free(address->m_addr);
1522
1523   free(address);
1524 }
1525
1526 void GAddress_SetFamily(GAddress *address, GAddressType type)
1527 {
1528   assert(address != NULL);
1529
1530   address->m_family = type;
1531 }
1532
1533 GAddressType GAddress_GetFamily(GAddress *address)
1534 {
1535   assert(address != NULL);
1536
1537   return address->m_family;
1538 }
1539
1540 GSocketError _GAddress_translate_from(GAddress *address,
1541                                       struct sockaddr *addr, int len)
1542 {
1543   address->m_realfamily = addr->sa_family;
1544   switch (addr->sa_family)
1545   {
1546     case AF_INET:
1547       address->m_family = GSOCK_INET;
1548       break;
1549     case AF_UNIX:
1550       address->m_family = GSOCK_UNIX;
1551       break;
1552 #ifdef AF_INET6
1553     case AF_INET6:
1554       address->m_family = GSOCK_INET6;
1555       break;
1556 #endif
1557     default:
1558     {
1559       address->m_error = GSOCK_INVOP;
1560       return GSOCK_INVOP;
1561     }
1562   }
1563
1564   if (address->m_addr)
1565     free(address->m_addr);
1566
1567   address->m_len  = len;
1568   address->m_addr = (struct sockaddr *)malloc(len);
1569
1570   if (address->m_addr == NULL)
1571   {
1572     address->m_error = GSOCK_MEMERR;
1573     return GSOCK_MEMERR;
1574   }
1575   memcpy(address->m_addr, addr, len);
1576
1577   return GSOCK_NOERROR;
1578 }
1579
1580 GSocketError _GAddress_translate_to(GAddress *address,
1581                                     struct sockaddr **addr, int *len)
1582 {
1583   if (!address->m_addr)
1584   {
1585     address->m_error = GSOCK_INVADDR;
1586     return GSOCK_INVADDR;
1587   }
1588
1589   *len = address->m_len;
1590   *addr = (struct sockaddr *)malloc(address->m_len);
1591   if (*addr == NULL)
1592   {
1593     address->m_error = GSOCK_MEMERR;
1594     return GSOCK_MEMERR;
1595   }
1596
1597   memcpy(*addr, address->m_addr, address->m_len);
1598   return GSOCK_NOERROR;
1599 }
1600
1601 /*
1602  * -------------------------------------------------------------------------
1603  * Internet address family
1604  * -------------------------------------------------------------------------
1605  */
1606
1607 GSocketError _GAddress_Init_INET(GAddress *address)
1608 {
1609   address->m_len  = sizeof(struct sockaddr_in);
1610   address->m_addr = (struct sockaddr *) malloc(address->m_len);
1611   if (address->m_addr == NULL)
1612   {
1613     address->m_error = GSOCK_MEMERR;
1614     return GSOCK_MEMERR;
1615   }
1616
1617   address->m_family = GSOCK_INET;
1618   address->m_realfamily = PF_INET;
1619   ((struct sockaddr_in *)address->m_addr)->sin_family = AF_INET;
1620   ((struct sockaddr_in *)address->m_addr)->sin_addr.s_addr = INADDR_ANY;
1621
1622   return GSOCK_NOERROR;
1623 }
1624
1625 GSocketError GAddress_INET_SetHostName(GAddress *address, const char *hostname)
1626 {
1627   struct hostent *he;
1628   struct in_addr *addr;
1629
1630   assert(address != NULL);
1631
1632   CHECK_ADDRESS(address, INET);
1633
1634   addr = &(((struct sockaddr_in *)address->m_addr)->sin_addr);
1635
1636   /* If it is a numeric host name, convert it now */
1637 #if defined(HAVE_INET_ATON)
1638   if (inet_aton(hostname, addr) == 0)
1639   {
1640 #elif defined(HAVE_INET_ADDR)
1641   if ( (addr->s_addr = inet_addr(hostname)) == -1 )
1642   {
1643 #else
1644   /* Use gethostbyname by default */
1645 #ifndef __WXMAC__
1646   int val = 1;  /* VA doesn't like constants in conditional expressions */
1647   if (val)
1648 #endif
1649   {
1650 #endif
1651     struct in_addr *array_addr;
1652
1653     /* It is a real name, we solve it */
1654     if ((he = gethostbyname(hostname)) == NULL)
1655     {
1656       /* Reset to invalid address */
1657       addr->s_addr = INADDR_NONE;
1658       address->m_error = GSOCK_NOHOST;
1659       return GSOCK_NOHOST;
1660     }
1661     array_addr = (struct in_addr *) *(he->h_addr_list);
1662     addr->s_addr = array_addr[0].s_addr;
1663   }
1664   return GSOCK_NOERROR;
1665 }
1666
1667 GSocketError GAddress_INET_SetAnyAddress(GAddress *address)
1668 {
1669   return GAddress_INET_SetHostAddress(address, INADDR_ANY);
1670 }
1671
1672 GSocketError GAddress_INET_SetHostAddress(GAddress *address,
1673                                           unsigned long hostaddr)
1674 {
1675   struct in_addr *addr;
1676
1677   assert(address != NULL);
1678
1679   CHECK_ADDRESS(address, INET);
1680
1681   addr = &(((struct sockaddr_in *)address->m_addr)->sin_addr);
1682   addr->s_addr = htonl(hostaddr);
1683
1684   return GSOCK_NOERROR;
1685 }
1686
1687 GSocketError GAddress_INET_SetPortName(GAddress *address, const char *port,
1688                                        const char *protocol)
1689 {
1690   struct servent *se;
1691   struct sockaddr_in *addr;
1692
1693   assert(address != NULL);
1694   CHECK_ADDRESS(address, INET);
1695
1696   if (!port)
1697   {
1698     address->m_error = GSOCK_INVPORT;
1699     return GSOCK_INVPORT;
1700   }
1701
1702   se = getservbyname(port, protocol);
1703   if (!se)
1704   {
1705     /* the cast to int suppresses compiler warnings about subscript having the
1706        type char */
1707     if (isdigit((int)port[0]))
1708     {
1709       int port_int;
1710
1711       port_int = atoi(port);
1712       addr = (struct sockaddr_in *)address->m_addr;
1713       addr->sin_port = htons(port_int);
1714       return GSOCK_NOERROR;
1715     }
1716
1717     address->m_error = GSOCK_INVPORT;
1718     return GSOCK_INVPORT;
1719   }
1720
1721   addr = (struct sockaddr_in *)address->m_addr;
1722   addr->sin_port = se->s_port;
1723
1724   return GSOCK_NOERROR;
1725 }
1726
1727 GSocketError GAddress_INET_SetPort(GAddress *address, unsigned short port)
1728 {
1729   struct sockaddr_in *addr;
1730
1731   assert(address != NULL);
1732   CHECK_ADDRESS(address, INET);
1733
1734   addr = (struct sockaddr_in *)address->m_addr;
1735   addr->sin_port = htons(port);
1736
1737   return GSOCK_NOERROR;
1738 }
1739
1740 GSocketError GAddress_INET_GetHostName(GAddress *address, char *hostname, size_t sbuf)
1741 {
1742   struct hostent *he;
1743   char *addr_buf;
1744   struct sockaddr_in *addr;
1745
1746   assert(address != NULL);
1747   CHECK_ADDRESS(address, INET);
1748
1749   addr = (struct sockaddr_in *)address->m_addr;
1750   addr_buf = (char *)&(addr->sin_addr);
1751
1752   he = gethostbyaddr(addr_buf, sizeof(addr->sin_addr), AF_INET);
1753   if (he == NULL)
1754   {
1755     address->m_error = GSOCK_NOHOST;
1756     return GSOCK_NOHOST;
1757   }
1758
1759   strncpy(hostname, he->h_name, sbuf);
1760
1761   return GSOCK_NOERROR;
1762 }
1763
1764 unsigned long GAddress_INET_GetHostAddress(GAddress *address)
1765 {
1766   struct sockaddr_in *addr;
1767
1768   assert(address != NULL);
1769   CHECK_ADDRESS_RETVAL(address, INET, 0);
1770
1771   addr = (struct sockaddr_in *)address->m_addr;
1772
1773   return ntohl(addr->sin_addr.s_addr);
1774 }
1775
1776 unsigned short GAddress_INET_GetPort(GAddress *address)
1777 {
1778   struct sockaddr_in *addr;
1779
1780   assert(address != NULL);
1781   CHECK_ADDRESS_RETVAL(address, INET, 0);
1782
1783   addr = (struct sockaddr_in *)address->m_addr;
1784   return ntohs(addr->sin_port);
1785 }
1786
1787 /*
1788  * -------------------------------------------------------------------------
1789  * Unix address family
1790  * -------------------------------------------------------------------------
1791  */
1792
1793 #ifndef __VISAGECPP__
1794 GSocketError _GAddress_Init_UNIX(GAddress *address)
1795 {
1796   address->m_len  = sizeof(struct sockaddr_un);
1797   address->m_addr = (struct sockaddr *)malloc(address->m_len);
1798   if (address->m_addr == NULL)
1799   {
1800     address->m_error = GSOCK_MEMERR;
1801     return GSOCK_MEMERR;
1802   }
1803
1804   address->m_family = GSOCK_UNIX;
1805   address->m_realfamily = PF_UNIX;
1806   ((struct sockaddr_un *)address->m_addr)->sun_family = AF_UNIX;
1807   ((struct sockaddr_un *)address->m_addr)->sun_path[0] = 0;
1808
1809   return GSOCK_NOERROR;
1810 }
1811
1812 #define UNIX_SOCK_PATHLEN (sizeof(addr->sun_path)/sizeof(addr->sun_path[0]))
1813
1814 GSocketError GAddress_UNIX_SetPath(GAddress *address, const char *path)
1815 {
1816   struct sockaddr_un *addr;
1817
1818   assert(address != NULL);
1819
1820   CHECK_ADDRESS(address, UNIX);
1821
1822   addr = ((struct sockaddr_un *)address->m_addr);
1823   strncpy(addr->sun_path, path, UNIX_SOCK_PATHLEN);
1824   addr->sun_path[UNIX_SOCK_PATHLEN - 1] = '\0';
1825
1826   return GSOCK_NOERROR;
1827 }
1828
1829 GSocketError GAddress_UNIX_GetPath(GAddress *address, char *path, size_t sbuf)
1830 {
1831   struct sockaddr_un *addr;
1832
1833   assert(address != NULL);
1834   CHECK_ADDRESS(address, UNIX);
1835
1836   addr = (struct sockaddr_un *)address->m_addr;
1837
1838   strncpy(path, addr->sun_path, sbuf);
1839
1840   return GSOCK_NOERROR;
1841 }
1842 #endif  /* !defined(__VISAGECPP__) */
1843 #endif  /* wxUSE_SOCKETS || defined(__GSOCKET_STANDALONE__) */
1844