src/unix/gsocket.c

   1 /* -------------------------------------------------------------------------
   2  * Project: GSocket (Generic Socket) for WX
   3  * Name:    gsocket.c
   4  * Purpose: GSocket main Unix file
   5  * CVSID:   $Id$
   6  * -------------------------------------------------------------------------
   7  */
   8
   9 #include "wx/setup.h"
  10
  11 #if wxUSE_SOCKETS
  12
  13 #include <assert.h>
  14 #include <sys/types.h>
  15 #include <netdb.h>
  16 #include <sys/ioctl.h>
  17 #ifdef __VMS__
  18 #define SOCK_LEN_TYP (unsigned int*)
  19 #include <socket.h>
  20 struct  sockaddr_un {
  21         u_char  sun_len;                /* sockaddr len including null */
  22         u_char  sun_family;             /* AF_UNIX */
  23         char    sun_path[108];          /* path name (gag) */
  24 };
  25 #else
  26 #include <sys/socket.h>
  27 #include <sys/un.h>
  28 #define SOCK_LEN_TYP (int*)
  29 #endif
  30 #include <sys/time.h>
  31 #include <netinet/in.h>
  32 #include <arpa/inet.h>
  33 #include <errno.h>
  34
  35 #include <string.h>
  36 #include <unistd.h>
  37 #include <stdio.h>
  38 #include <stdlib.h>
  39 #include <stddef.h>
  40 #include <ctype.h>
  41
  42 #ifdef sun
  43 #    include <sys/filio.h>
  44 #endif
  45
  46 #ifdef sgi
  47 #    include <bstring.h>
  48 #endif
  49
  50 #include <signal.h>
  51
  52 #include "wx/gsocket.h"
  53 #include "wx/unix/gsockunx.h"
  54
  55 #ifndef SOCKLEN_T
  56
  57 #ifdef __GLIBC__
  58 #      if __GLIBC__ == 2
  59 #         define SOCKLEN_T socklen_t
  60 #      endif
  61 #else
  62 #      define SOCKLEN_T int
  63 #endif
  64
  65 #endif
  66
  67 #define MASK_SIGNAL()                       \
  68 {                                           \
  69   void (*old_handler)(int);                 \
  70                                             \
  71   old_handler = signal(SIGPIPE, SIG_IGN);
  72
  73 #define UNMASK_SIGNAL()                     \
  74   signal(SIGPIPE, old_handler);             \
  75 }
  76
  77
  78 /* Global initialisers */
  79
  80 bool GSocket_Init()
  81 {
  82   return TRUE;
  83 }
  84
  85 void GSocket_Cleanup()
  86 {
  87 }
  88
  89 /* Constructors / Destructors */
  90
  91 GSocket *GSocket_new()
  92 {
  93   int i;
  94   GSocket *socket;
  95
  96   socket = (GSocket *)malloc(sizeof(GSocket));
  97
  98   if (socket == NULL)
  99     return NULL;
 100
 101   socket->m_fd                  = -1;
 102   for (i=0;i<GSOCK_MAX_EVENT;i++)
 103   {
 104     socket->m_cbacks[i]         = NULL;
 105   }
 106   socket->m_detected            = 0;
 107   socket->m_local               = NULL;
 108   socket->m_peer                = NULL;
 109   socket->m_error               = GSOCK_NOERROR;
 110   socket->m_server              = FALSE;
 111   socket->m_stream              = TRUE;
 112   socket->m_gui_dependent       = NULL;
 113   socket->m_non_blocking        = FALSE;
 114   socket->m_timeout             = 10*60*1000;
 115                                 /* 10 minutes * 60 sec * 1000 millisec */
 116   socket->m_establishing        = FALSE;
 117
 118   /* We initialize the GUI specific entries here */
 119   _GSocket_GUI_Init(socket);
 120
 121   return socket;
 122 }
 123
 124 void GSocket_destroy(GSocket *socket)
 125 {
 126   assert(socket != NULL);
 127
 128   /* First, we check that the socket is really shutdowned */
 129   if (socket->m_fd != -1)
 130     GSocket_Shutdown(socket);
 131
 132   /* We destroy GUI specific variables */
 133   _GSocket_GUI_Destroy(socket);
 134
 135   /* We destroy private addresses */
 136   if (socket->m_local)
 137     GAddress_destroy(socket->m_local);
 138
 139   if (socket->m_peer)
 140     GAddress_destroy(socket->m_peer);
 141
 142   /* We destroy socket itself */
 143   free(socket);
 144 }
 145
 146 void GSocket_Shutdown(GSocket *socket)
 147 {
 148   int evt;
 149
 150   assert(socket != NULL);
 151
 152   /* If socket has been created, we shutdown it */
 153   if (socket->m_fd != -1)
 154   {
 155     shutdown(socket->m_fd, 2);
 156     close(socket->m_fd);
 157     socket->m_fd = -1;
 158   }
 159
 160   /* We also disable GUI callbacks */
 161   for (evt = 0; evt < GSOCK_MAX_EVENT; evt++)
 162     socket->m_cbacks[evt] = NULL;
 163
 164   socket->m_detected = 0;
 165   _GSocket_Disable_Events(socket);
 166 }
 167
 168 /* Address handling */
 169
 170 GSocketError GSocket_SetLocal(GSocket *socket, GAddress *address)
 171 {
 172   assert(socket != NULL);
 173
 174   if ((socket->m_fd != -1 && !socket->m_server)) {
 175     socket->m_error = GSOCK_INVSOCK;
 176     return GSOCK_INVSOCK;
 177   }
 178
 179   if (address == NULL || address->m_family == GSOCK_NOFAMILY) {
 180     socket->m_error = GSOCK_INVADDR;
 181     return GSOCK_INVADDR;
 182   }
 183
 184   if (socket->m_local)
 185     GAddress_destroy(socket->m_local);
 186
 187   socket->m_local = GAddress_copy(address);
 188
 189   return GSOCK_NOERROR;
 190 }
 191
 192 GSocketError GSocket_SetPeer(GSocket *socket, GAddress *address)
 193 {
 194   assert(socket != NULL);
 195
 196   if (address == NULL || address->m_family == GSOCK_NOFAMILY) {
 197     socket->m_error = GSOCK_INVADDR;
 198     return GSOCK_INVADDR;
 199   }
 200
 201   if (socket->m_peer)
 202     GAddress_destroy(socket->m_peer);
 203
 204   socket->m_peer = GAddress_copy(address);
 205
 206   return GSOCK_NOERROR;
 207 }
 208
 209 GAddress *GSocket_GetLocal(GSocket *socket)
 210 {
 211   GAddress *address;
 212   struct sockaddr addr;
 213   SOCKLEN_T size;
 214   GSocketError err;
 215
 216   assert(socket != NULL);
 217
 218   if (socket->m_local)
 219     return GAddress_copy(socket->m_local);
 220
 221   if (socket->m_fd == -1) {
 222     socket->m_error = GSOCK_INVSOCK;
 223     return NULL;
 224   }
 225
 226   size = sizeof(addr);
 227
 228   if (getsockname(socket->m_fd, &addr, SOCK_LEN_TYP &size) < 0) {
 229     socket->m_error = GSOCK_IOERR;
 230     return NULL;
 231   }
 232
 233   address = GAddress_new();
 234   if (address == NULL) {
 235     socket->m_error = GSOCK_MEMERR;
 236     return NULL;
 237   }
 238   socket->m_error = _GAddress_translate_from(address, &addr, size);
 239   if (socket->m_error != GSOCK_NOERROR) {
 240     GAddress_destroy(address);
 241     return NULL;
 242   }
 243
 244   return address;
 245 }
 246
 247 GAddress *GSocket_GetPeer(GSocket *socket)
 248 {
 249   assert(socket != NULL);
 250
 251   if (socket->m_peer)
 252     return GAddress_copy(socket->m_peer);
 253
 254   return NULL;
 255 }
 256
 257 /* Server specific parts */
 258
 259 /* GSocket_SetServer:
 260  *  Sets up the socket as a server. It uses the "Local" field of GSocket.
 261  *  "Local" must be set by GSocket_SetLocal() before GSocket_SetServer()
 262  *  is called. Possible error codes are: GSOCK_INVSOCK if socket has not
 263  *  been initialized, GSOCK_INVADDR if the local address has not been
 264  *  defined and GSOCK_IOERR for other internal errors.
 265  */
 266 GSocketError GSocket_SetServer(GSocket *sck)
 267 {
 268   int type;
 269   int arg = 1;
 270
 271   assert(sck != NULL);
 272
 273   if (sck->m_fd != -1) {
 274     sck->m_error = GSOCK_INVSOCK;
 275     return GSOCK_INVSOCK;
 276   }
 277
 278   if (!sck->m_local) {
 279     sck->m_error = GSOCK_INVADDR;
 280     return GSOCK_INVADDR;
 281   }
 282
 283   /* We always have a stream here  */
 284   sck->m_stream = TRUE;
 285   sck->m_server = TRUE;
 286
 287   /* Create the socket */
 288   sck->m_fd = socket(sck->m_local->m_realfamily, SOCK_STREAM, 0);
 289
 290   if (sck->m_fd == -1) {
 291     sck->m_error = GSOCK_IOERR;
 292     return GSOCK_IOERR;
 293   }
 294
 295   ioctl(sck->m_fd, FIONBIO, &arg);
 296   _GSocket_Enable_Events(sck);
 297
 298   /* Bind the socket to the LOCAL address */
 299   if (bind(sck->m_fd, sck->m_local->m_addr, sck->m_local->m_len) < 0) {
 300     close(sck->m_fd);
 301     sck->m_fd = -1;
 302     sck->m_error = GSOCK_IOERR;
 303     return GSOCK_IOERR;
 304   }
 305
 306   /* Enable listening up to 5 connections */
 307   if (listen(sck->m_fd, 5) < 0) {
 308     close(sck->m_fd);
 309     sck->m_fd = -1;
 310     sck->m_error = GSOCK_IOERR;
 311     return GSOCK_IOERR;
 312   }
 313
 314   return GSOCK_NOERROR;
 315 }
 316
 317 /* GSocket_WaitConnection:
 318  *  Waits for an incoming client connection.
 319  */
 320 GSocket *GSocket_WaitConnection(GSocket *socket)
 321 {
 322   GSocket *connection;
 323   int arg = 1;
 324
 325   assert(socket != NULL);
 326
 327   /* Reenable CONNECTION events */
 328   _GSocket_Enable(socket, GSOCK_CONNECTION);
 329
 330   /* If the socket has already been created, we exit immediately */
 331   if (socket->m_fd == -1 || !socket->m_server)
 332   {
 333     socket->m_error = GSOCK_INVSOCK;
 334     return NULL;
 335   }
 336
 337   /* Create a GSocket object for the new connection */
 338   connection = GSocket_new();
 339   if (!connection)
 340   {
 341     connection->m_error = GSOCK_MEMERR;
 342     return NULL;
 343   }
 344
 345   /* Accept the incoming connection */
 346   if (_GSocket_Input_Timeout(socket) == GSOCK_TIMEDOUT)
 347   {
 348     GSocket_destroy(connection);
 349     /* socket->m_error set by _GSocket_Input_Timeout */
 350     return NULL;
 351   }
 352
 353   connection->m_fd = accept(socket->m_fd, NULL, NULL);
 354
 355   if (connection->m_fd == -1)
 356   {
 357     if (errno == EWOULDBLOCK)
 358       socket->m_error = GSOCK_WOULDBLOCK;
 359     else
 360       socket->m_error = GSOCK_IOERR;
 361
 362     GSocket_destroy(connection);
 363     return NULL;
 364   }
 365
 366   /* Initialize all fields */
 367   connection->m_server   = FALSE;
 368   connection->m_stream   = TRUE;
 369   connection->m_oriented = TRUE;
 370
 371   ioctl(connection->m_fd, FIONBIO, &arg);
 372   _GSocket_Enable_Events(connection);
 373
 374   return connection;
 375 }
 376
 377 /* Non oriented connections */
 378
 379 GSocketError GSocket_SetNonOriented(GSocket *sck)
 380 {
 381   int arg = 1;
 382
 383   assert(sck != NULL);
 384
 385   if (sck->m_fd != -1) {
 386     sck->m_error = GSOCK_INVSOCK;
 387     return GSOCK_INVSOCK;
 388   }
 389
 390   if (!sck->m_local) {
 391     sck->m_error = GSOCK_INVADDR;
 392     return GSOCK_INVADDR;
 393   }
 394
 395   sck->m_stream   = FALSE;
 396   sck->m_server   = FALSE;
 397   sck->m_oriented = FALSE;
 398
 399   /* Create the socket */
 400   sck->m_fd = socket(sck->m_local->m_realfamily, SOCK_DGRAM, 0);
 401
 402   if (sck->m_fd < 0) {
 403     sck->m_error = GSOCK_IOERR;
 404     return GSOCK_IOERR;
 405   }
 406
 407   ioctl(sck->m_fd, FIONBIO, &arg);
 408   _GSocket_Enable_Events(sck);
 409
 410   /* Bind it to the LOCAL address */
 411   if (bind(sck->m_fd, sck->m_local->m_addr, sck->m_local->m_len) < 0) {
 412     close(sck->m_fd);
 413     sck->m_fd    = -1;
 414     sck->m_error = GSOCK_IOERR;
 415     return GSOCK_IOERR;
 416   }
 417
 418   return GSOCK_NOERROR;
 419 }
 420
 421 /* Client specific parts */
 422
 423 /* GSocket_Connect:
 424  *  Establishes a client connection to a server using the "Peer"
 425  *  field of GSocket. "Peer" must be set by GSocket_SetPeer() before
 426  *  GSocket_Connect() is called. Possible error codes are GSOCK_INVSOCK,
 427  *  GSOCK_INVADDR, GSOCK_TIMEDOUT, GSOCK_WOULDBLOCK and GSOCK_IOERR.
 428  *  If a socket is nonblocking and Connect() returns GSOCK_WOULDBLOCK,
 429  *  the connection request can be completed later. Use GSocket_Select()
 430  *  to check or wait for a GSOCK_CONNECTION event.
 431  */
 432 GSocketError GSocket_Connect(GSocket *sck, GSocketStream stream)
 433 {
 434   int type, err, ret;
 435   int arg = 1;
 436
 437   assert(sck != NULL);
 438
 439   /* Enable CONNECTION events (needed for nonblocking connections) */
 440   _GSocket_Enable(sck, GSOCK_CONNECTION);
 441
 442   if (sck->m_fd != -1)
 443   {
 444     sck->m_error = GSOCK_INVSOCK;
 445     return GSOCK_INVSOCK;
 446   }
 447
 448   if (!sck->m_peer)
 449   {
 450     sck->m_error = GSOCK_INVADDR;
 451     return GSOCK_INVADDR;
 452   }
 453
 454   /* Test whether we want the socket to be a stream (e.g. TCP) */
 455   sck->m_stream   = (stream == GSOCK_STREAMED);
 456   sck->m_oriented = TRUE;
 457   sck->m_server   = FALSE;
 458   sck->m_establishing = FALSE;
 459
 460   if (sck->m_stream)
 461     type = SOCK_STREAM;
 462   else
 463     type = SOCK_DGRAM;
 464
 465   /* Create the socket */
 466   sck->m_fd = socket(sck->m_peer->m_realfamily, type, 0);
 467
 468   if (sck->m_fd == -1) {
 469     sck->m_error = GSOCK_IOERR;
 470     return GSOCK_IOERR;
 471   }
 472
 473   ioctl(sck->m_fd, FIONBIO, &arg);
 474   _GSocket_Enable_Events(sck);
 475
 476   /* Connect it to the PEER address */
 477   ret = connect(sck->m_fd, sck->m_peer->m_addr, sck->m_peer->m_len);
 478
 479   if (ret == -1)
 480   {
 481     err = errno;
 482
 483     /* If connect failed with EINPROGRESS and the GSocket object
 484      * is in blocking mode, we select() for the specified timeout
 485      * checking for writability to see if the connection request
 486      * completes.
 487      */
 488     if ((err == EINPROGRESS) && (!sck->m_non_blocking))
 489     {
 490       if (_GSocket_Output_Timeout(sck) == GSOCK_TIMEDOUT)
 491       {
 492         close(sck->m_fd);
 493         sck->m_fd = -1;
 494         /* sck->m_error is set in _GSocket_Output_Timeout */
 495         return GSOCK_TIMEDOUT;
 496       }
 497       else
 498       {
 499         return GSOCK_NOERROR;
 500       }
 501     }
 502
 503     /* If connect failed with EINPROGRESS and the GSocket object
 504      * is set to nonblocking, we set m_error to GSOCK_WOULDBLOCK
 505      * (and return GSOCK_WOULDBLOCK) but we don't close the socket;
 506      * this way if the connection completes, a GSOCK_CONNECTION
 507      * event will be generated, if enabled.
 508      */
 509     if ((err == EINPROGRESS) && (sck->m_non_blocking))
 510     {
 511       sck->m_error = GSOCK_WOULDBLOCK;
 512       sck->m_establishing = TRUE;
 513
 514       return GSOCK_WOULDBLOCK;
 515     }
 516
 517     /* If connect failed with an error other than EINPROGRESS,
 518      * then the call to GSocket_Connect has failed.
 519      */
 520     close(sck->m_fd);
 521     sck->m_fd = -1;
 522     sck->m_error = GSOCK_IOERR;
 523
 524     return GSOCK_IOERR;
 525   }
 526
 527   return GSOCK_NOERROR;
 528 }
 529
 530 /* Generic IO */
 531
 532 /* Like recv(), send(), ... */
 533 int GSocket_Read(GSocket *socket, char *buffer, int size)
 534 {
 535   int ret;
 536
 537   assert(socket != NULL);
 538
 539   /* Reenable INPUT events */
 540   _GSocket_Enable(socket, GSOCK_INPUT);
 541
 542   if (socket->m_fd == -1 || socket->m_server)
 543   {
 544     socket->m_error = GSOCK_INVSOCK;
 545     return -1;
 546   }
 547
 548   if (_GSocket_Input_Timeout(socket) == GSOCK_TIMEDOUT)
 549     return -1;
 550
 551   if (socket->m_stream)
 552     ret = _GSocket_Recv_Stream(socket, buffer, size);
 553   else
 554     ret = _GSocket_Recv_Dgram(socket, buffer, size);
 555
 556   if (ret == -1)
 557   {
 558     if (errno == EWOULDBLOCK)
 559       socket->m_error = GSOCK_WOULDBLOCK;
 560     else
 561       socket->m_error = GSOCK_IOERR;
 562   }
 563
 564   return ret;
 565 }
 566
 567 int GSocket_Write(GSocket *socket, const char *buffer,
 568                   int size)
 569 {
 570   int ret;
 571
 572   assert(socket != NULL);
 573
 574   if (socket->m_fd == -1 || socket->m_server)
 575   {
 576     socket->m_error = GSOCK_INVSOCK;
 577     return -1;
 578   }
 579
 580   if (_GSocket_Output_Timeout(socket) == GSOCK_TIMEDOUT)
 581     return -1;
 582
 583   if (socket->m_stream)
 584     ret = _GSocket_Send_Stream(socket, buffer, size);
 585   else
 586     ret = _GSocket_Send_Dgram(socket, buffer, size);
 587
 588   if (ret == -1)
 589   {
 590     if (errno == EWOULDBLOCK)
 591       socket->m_error = GSOCK_WOULDBLOCK;
 592     else
 593       socket->m_error = GSOCK_IOERR;
 594
 595     /* Only reenable OUTPUT events after an error (just like WSAAsyncSelect
 596      * in MSW). Once the first OUTPUT event is received, users can assume
 597      * that the socket is writable until a read operation fails. Only then
 598      * will further OUTPUT events be posted.
 599      */
 600     _GSocket_Enable(socket, GSOCK_OUTPUT);
 601   }
 602
 603   return ret;
 604 }
 605
 606 /* GSocket_Select:
 607  *  Polls the socket to determine its status. This function will
 608  *  check for the events specified in the 'flags' parameter, and
 609  *  it will return a mask indicating which operations can be
 610  *  performed. This function won't block, regardless of the
 611  *  mode (blocking|nonblocking) of the socket.
 612  */
 613 GSocketEventFlags GSocket_Select(GSocket *socket, GSocketEventFlags flags)
 614 {
 615   assert(socket != NULL);
 616
 617   return (flags & socket->m_detected);
 618 }
 619
 620 /* Flags */
 621
 622 /* GSocket_SetNonBlocking:
 623  *  Sets the socket to non-blocking mode. This is useful if
 624  *  we don't want to wait.
 625  */
 626 void GSocket_SetNonBlocking(GSocket *socket, bool non_block)
 627 {
 628   assert(socket != NULL);
 629
 630   socket->m_non_blocking = non_block;
 631 }
 632
 633 /* GSocket_SetTimeout:
 634  *  Sets the timeout for blocking calls. Time is
 635  *  expressed in milliseconds.
 636  */
 637 void GSocket_SetTimeout(GSocket *socket, unsigned long millisec)
 638 {
 639   assert(socket != NULL);
 640
 641   socket->m_timeout = millisec;
 642 }
 643
 644 /* GSocket_GetError:
 645  *  Returns the last error occured for this socket.
 646  */
 647 GSocketError GSocket_GetError(GSocket *socket)
 648 {
 649   assert(socket != NULL);
 650
 651   return socket->m_error;
 652 }
 653
 654 /* Callbacks */
 655
 656 /* Only one callback is possible for each event (INPUT, OUTPUT, CONNECTION
 657  * and LOST). The callbacks are called in the following situations:
 658  *
 659  * INPUT: There is at least one byte in the input buffer
 660  * OUTPUT: The system is sure that the next write call will not block
 661  * CONNECTION: Two cases are possible:
 662  *           Client socket -> the connection is established
 663  *           Server socket -> a client requests a connection
 664  * LOST: The connection is lost
 665  *
 666  * An event is generated only once and its state is reseted when the
 667  * relative IO call is requested.
 668  * For example: INPUT -> GSocket_Read()
 669  *              CONNECTION -> GSocket_Accept()
 670  */
 671
 672 /* GSocket_SetCallback:
 673  *  Enables the callbacks specified by 'flags'. Note that 'flags'
 674  *  may be a combination of flags OR'ed toghether, so the same
 675  *  callback function can be made to accept different events.
 676  *  The callback function must have the following prototype:
 677  *
 678  *  void function(GSocket *socket, GSocketEvent event, char *cdata)
 679  */
 680 void GSocket_SetCallback(GSocket *socket, GSocketEventFlags flags,
 681                          GSocketCallback callback, char *cdata)
 682 {
 683   int count;
 684
 685   assert(socket != NULL);
 686
 687   for (count = 0; count < GSOCK_MAX_EVENT; count++)
 688   {
 689     if ((flags & (1 << count)) != 0)
 690     {
 691       socket->m_cbacks[count] = callback;
 692       socket->m_data[count] = cdata;
 693     }
 694   }
 695 }
 696
 697 /* GSocket_UnsetCallback:
 698  *  Disables all callbacks specified by 'flags', which may be a
 699  *  combination of flags OR'ed toghether.
 700  */
 701 void GSocket_UnsetCallback(GSocket *socket, GSocketEventFlags flags)
 702 {
 703   int count;
 704
 705   assert(socket != NULL);
 706
 707   for (count = 0; count < GSOCK_MAX_EVENT; count++)
 708   {
 709     if ((flags & (1 << count)) != 0)
 710     {
 711       socket->m_cbacks[count] = NULL;
 712       socket->m_data[count] = NULL;
 713     }
 714   }
 715 }
 716
 717 #define CALL_CALLBACK(socket, event) {                                  \
 718   _GSocket_Disable(socket, event);                                      \
 719   if (socket->m_cbacks[event])                                          \
 720     socket->m_cbacks[event](socket, event, socket->m_data[event]);      \
 721 }
 722
 723
 724 void _GSocket_Enable(GSocket *socket, GSocketEvent event)
 725 {
 726   socket->m_detected &= ~(1 << event);
 727   _GSocket_Install_Callback(socket, event);
 728 }
 729
 730 void _GSocket_Disable(GSocket *socket, GSocketEvent event)
 731 {
 732   socket->m_detected |= (1 << event);
 733   _GSocket_Uninstall_Callback(socket, event);
 734 }
 735
 736 /* _GSocket_Input_Timeout:
 737  *  For blocking sockets, wait until data is available or
 738  *  until timeout ellapses.
 739  */
 740 GSocketError _GSocket_Input_Timeout(GSocket *socket)
 741 {
 742   struct timeval tv;
 743   fd_set readfds;
 744
 745   /* Linux select() will overwrite the struct on return */
 746   tv.tv_sec  = (socket->m_timeout / 1000);
 747   tv.tv_usec = (socket->m_timeout % 1000) * 1000;
 748
 749   if (!socket->m_non_blocking)
 750   {
 751     FD_ZERO(&readfds);
 752     FD_SET(socket->m_fd, &readfds);
 753     if (select(socket->m_fd + 1, &readfds, NULL, NULL, &tv) == 0)
 754     {
 755       socket->m_error = GSOCK_TIMEDOUT;
 756       return GSOCK_TIMEDOUT;
 757     }
 758   }
 759   return GSOCK_NOERROR;
 760 }
 761
 762 /* _GSocket_Output_Timeout:
 763  *  For blocking sockets, wait until data can be sent without
 764  *  blocking or until timeout ellapses.
 765  */
 766 GSocketError _GSocket_Output_Timeout(GSocket *socket)
 767 {
 768   struct timeval tv;
 769   fd_set writefds;
 770
 771   /* Linux select() will overwrite the struct on return */
 772   tv.tv_sec  = (socket->m_timeout / 1000);
 773   tv.tv_usec = (socket->m_timeout % 1000) * 1000;
 774
 775   if (!socket->m_non_blocking)
 776   {
 777     FD_ZERO(&writefds);
 778     FD_SET(socket->m_fd, &writefds);
 779     if (select(socket->m_fd + 1, NULL, &writefds, NULL, &tv) == 0)
 780     {
 781       socket->m_error = GSOCK_TIMEDOUT;
 782       return GSOCK_TIMEDOUT;
 783     }
 784   }
 785   return GSOCK_NOERROR;
 786 }
 787
 788 int _GSocket_Recv_Stream(GSocket *socket, char *buffer, int size)
 789 {
 790   int ret;
 791
 792   MASK_SIGNAL();
 793   ret = recv(socket->m_fd, buffer, size, 0);
 794   UNMASK_SIGNAL();
 795
 796   return ret;
 797 }
 798
 799 int _GSocket_Recv_Dgram(GSocket *socket, char *buffer, int size)
 800 {
 801   struct sockaddr from;
 802   SOCKLEN_T fromlen;
 803   int ret;
 804   GSocketError err;
 805
 806   fromlen = sizeof(from);
 807
 808   MASK_SIGNAL();
 809   ret = recvfrom(socket->m_fd, buffer, size, 0, &from,
 810                  SOCK_LEN_TYP &fromlen);
 811   UNMASK_SIGNAL();
 812
 813   if (ret == -1)
 814     return -1;
 815
 816   /* Translate a system address into a GSocket address */
 817   if (!socket->m_peer)
 818   {
 819     socket->m_peer = GAddress_new();
 820     if (!socket->m_peer)
 821     {
 822       socket->m_error = GSOCK_MEMERR;
 823       return -1;
 824     }
 825   }
 826   err = _GAddress_translate_from(socket->m_peer, &from, fromlen);
 827   if (err != GSOCK_NOERROR)
 828   {
 829     GAddress_destroy(socket->m_peer);
 830     socket->m_peer  = NULL;
 831     socket->m_error = err;
 832     return -1;
 833   }
 834
 835   return ret;
 836 }
 837
 838 int _GSocket_Send_Stream(GSocket *socket, const char *buffer, int size)
 839 {
 840   int ret;
 841   GSocketError err;
 842
 843   MASK_SIGNAL();
 844   ret = send(socket->m_fd, buffer, size, 0);
 845   UNMASK_SIGNAL();
 846
 847   return ret;
 848 }
 849
 850 int _GSocket_Send_Dgram(GSocket *socket, const char *buffer, int size)
 851 {
 852   struct sockaddr *addr;
 853   int len, ret;
 854   GSocketError err;
 855
 856   if (!socket->m_peer) {
 857     socket->m_error = GSOCK_INVADDR;
 858     return -1;
 859   }
 860
 861   err = _GAddress_translate_to(socket->m_peer, &addr, &len);
 862   if (err != GSOCK_NOERROR) {
 863     socket->m_error = err;
 864     return -1;
 865   }
 866
 867   MASK_SIGNAL();
 868   ret = sendto(socket->m_fd, buffer, size, 0, addr, len);
 869   UNMASK_SIGNAL();
 870
 871   /* Frees memory allocated from _GAddress_translate_to */
 872   free(addr);
 873
 874   return ret;
 875 }
 876
 877 void _GSocket_Detected_Read(GSocket *socket)
 878 {
 879   char c;
 880   int ret;
 881
 882   if (socket->m_stream)
 883   {
 884     ret = recv(socket->m_fd, &c, 1, MSG_PEEK);
 885
 886     if (ret < 0 && socket->m_server)
 887     {
 888       CALL_CALLBACK(socket, GSOCK_CONNECTION);
 889       return;
 890     }
 891
 892     if (ret > 0)
 893     {
 894       CALL_CALLBACK(socket, GSOCK_INPUT);
 895     }
 896     else
 897     {
 898       CALL_CALLBACK(socket, GSOCK_LOST);
 899     }
 900   }
 901 }
 902
 903 void _GSocket_Detected_Write(GSocket *socket)
 904 {
 905   if (socket->m_establishing && !socket->m_server)
 906   {
 907     int error, len;
 908
 909     socket->m_establishing = FALSE;
 910
 911     len = sizeof(error);
 912     getsockopt(socket->m_fd, SOL_SOCKET, SO_ERROR, (void*) &error,
 913                SOCK_LEN_TYP &len);
 914
 915     if (error)
 916     {
 917       CALL_CALLBACK(socket, GSOCK_LOST);
 918     }
 919     else
 920     {
 921       CALL_CALLBACK(socket, GSOCK_CONNECTION);
 922       /* We have to fire this event by hand because CONNECTION (for clients)
 923        * and OUTPUT are internally the same and we just disabled CONNECTION
 924        * events with the above macro.
 925        */
 926       CALL_CALLBACK(socket, GSOCK_OUTPUT);
 927     }
 928   }
 929   else
 930   {
 931     CALL_CALLBACK(socket, GSOCK_OUTPUT);
 932   }
 933 }
 934
 935 /*
 936  * -------------------------------------------------------------------------
 937  * GAddress
 938  * -------------------------------------------------------------------------
 939  */
 940
 941 /* CHECK_ADDRESS verifies that the current family is either GSOCK_NOFAMILY or
 942  * GSOCK_*family*. In case it is GSOCK_NOFAMILY, it initializes address to be
 943  * a GSOCK_*family*. In other cases, it returns GSOCK_INVADDR.
 944  */
 945 #define CHECK_ADDRESS(address, family, retval) \
 946 { \
 947   if (address->m_family == GSOCK_NOFAMILY) \
 948     if (_GAddress_Init_##family(address) != GSOCK_NOERROR) {\
 949       return address->m_error; \
 950     }\
 951   if (address->m_family != GSOCK_##family) {\
 952     address->m_error = GSOCK_INVADDR; \
 953     return retval; \
 954   } \
 955 }
 956
 957 GAddress *GAddress_new()
 958 {
 959   GAddress *address;
 960
 961   address = (GAddress *)malloc(sizeof(GAddress));
 962
 963   if (address == NULL)
 964     return NULL;
 965
 966   address->m_family  = GSOCK_NOFAMILY;
 967   address->m_addr    = NULL;
 968   address->m_len     = 0;
 969
 970   return address;
 971 }
 972
 973 GAddress *GAddress_copy(GAddress *address)
 974 {
 975   GAddress *addr2;
 976
 977   assert(address != NULL);
 978
 979   addr2 = (GAddress *)malloc(sizeof(GAddress));
 980
 981   if (addr2 == NULL)
 982     return NULL;
 983
 984   memcpy(addr2, address, sizeof(GAddress));
 985
 986   if (address->m_addr) {
 987     addr2->m_addr = (struct sockaddr *)malloc(addr2->m_len);
 988     if (addr2->m_addr == NULL) {
 989       free(addr2);
 990       return NULL;
 991     }
 992     memcpy(addr2->m_addr, address->m_addr, addr2->m_len);
 993   }
 994
 995   return addr2;
 996 }
 997
 998 void GAddress_destroy(GAddress *address)
 999 {
1000   assert(address != NULL);
1001
1002   free(address);
1003 }
1004
1005 void GAddress_SetFamily(GAddress *address, GAddressType type)
1006 {
1007   assert(address != NULL);
1008
1009   address->m_family = type;
1010 }
1011
1012 GAddressType GAddress_GetFamily(GAddress *address)
1013 {
1014   assert(address != NULL);
1015
1016   return address->m_family;
1017 }
1018
1019 GSocketError _GAddress_translate_from(GAddress *address, struct sockaddr *addr, int len){
1020   address->m_realfamily = addr->sa_family;
1021   switch (addr->sa_family) {
1022   case AF_INET:
1023     address->m_family = GSOCK_INET;
1024     break;
1025   case AF_UNIX:
1026     address->m_family = GSOCK_UNIX;
1027     break;
1028 #ifdef AF_INET6
1029   case AF_INET6:
1030     address->m_family = GSOCK_INET6;
1031     break;
1032 #endif
1033   default:
1034     {
1035     address->m_error = GSOCK_INVOP;
1036     return GSOCK_INVOP;
1037     }
1038   }
1039
1040   if (address->m_addr)
1041     free(address->m_addr);
1042
1043   address->m_len  = len;
1044   address->m_addr = (struct sockaddr *)malloc(len);
1045   if (address->m_addr == NULL) {
1046     address->m_error = GSOCK_MEMERR;
1047     return GSOCK_MEMERR;
1048   }
1049   memcpy(address->m_addr, addr, len);
1050
1051   return GSOCK_NOERROR;
1052 }
1053
1054 GSocketError _GAddress_translate_to(GAddress *address,
1055                                     struct sockaddr **addr, int *len)
1056 {
1057   if (!address->m_addr) {
1058     address->m_error = GSOCK_INVADDR;
1059     return GSOCK_INVADDR;
1060   }
1061
1062   *len = address->m_len;
1063   *addr = (struct sockaddr *)malloc(address->m_len);
1064   if (*addr == NULL) {
1065     address->m_error = GSOCK_MEMERR;
1066     return GSOCK_MEMERR;
1067   }
1068
1069   memcpy(*addr, address->m_addr, address->m_len);
1070   return GSOCK_NOERROR;
1071 }
1072
1073 /*
1074  * -------------------------------------------------------------------------
1075  * Internet address family
1076  * -------------------------------------------------------------------------
1077  */
1078
1079 GSocketError _GAddress_Init_INET(GAddress *address)
1080 {
1081   address->m_len  = sizeof(struct sockaddr_in);
1082   address->m_addr = (struct sockaddr *)malloc(address->m_len);
1083   if (address->m_addr == NULL)
1084   {
1085     address->m_error = GSOCK_MEMERR;
1086     return GSOCK_MEMERR;
1087   }
1088
1089   address->m_family = GSOCK_INET;
1090   address->m_realfamily = PF_INET;
1091   ((struct sockaddr_in *)address->m_addr)->sin_family = AF_INET;
1092   /*
1093      INADDR_BROADCAST is identical to INADDR_NONE which is not defined
1094      on all unices. INADDR_BROADCAST should be fine to indicate an error.
1095    */
1096   ((struct sockaddr_in *)address->m_addr)->sin_addr.s_addr = INADDR_BROADCAST;
1097
1098   return GSOCK_NOERROR;
1099 }
1100
1101 GSocketError GAddress_INET_SetHostName(GAddress *address, const char *hostname)
1102 {
1103   struct hostent *he;
1104   struct in_addr *addr;
1105
1106   assert(address != NULL);
1107
1108   CHECK_ADDRESS(address, INET, GSOCK_INVADDR);
1109
1110   addr = &(((struct sockaddr_in *)address->m_addr)->sin_addr);
1111
1112   /* If it is a numeric host name, convert it now */
1113 #if defined(HAVE_INET_ATON)
1114   if (inet_aton(hostname, addr) == 0)
1115   {
1116 #elif defined(HAVE_INET_ADDR)
1117   /* Fix from Guillermo Rodriguez Garcia <guille@iies.es> */
1118   if ( (addr->s_addr = inet_addr(hostname)) == -1 )
1119   {
1120 #else
1121   /* Use gethostbyname by default */
1122   if (1)
1123   {
1124 #endif
1125     struct in_addr *array_addr;
1126
1127     /* It is a real name, we solve it */
1128     if ((he = gethostbyname(hostname)) == NULL)
1129     {
1130       address->m_error = GSOCK_NOHOST;
1131       return GSOCK_NOHOST;
1132     }
1133     array_addr = (struct in_addr *) *(he->h_addr_list);
1134     addr->s_addr = array_addr[0].s_addr;
1135   }
1136   return GSOCK_NOERROR;
1137 }
1138
1139 GSocketError GAddress_INET_SetHostAddress(GAddress *address,
1140                                           unsigned long hostaddr)
1141 {
1142   struct in_addr *addr;
1143
1144   assert(address != NULL);
1145
1146   CHECK_ADDRESS(address, INET, GSOCK_INVADDR);
1147
1148   addr = &(((struct sockaddr_in *)address->m_addr)->sin_addr);
1149   addr->s_addr = hostaddr;
1150
1151   return GSOCK_NOERROR;
1152 }
1153
1154 GSocketError GAddress_INET_SetPortName(GAddress *address, const char *port,
1155                                        const char *protocol)
1156 {
1157   struct servent *se;
1158   struct sockaddr_in *addr;
1159
1160   assert(address != NULL);
1161   CHECK_ADDRESS(address, INET, GSOCK_INVADDR);
1162
1163   if (!port)
1164   {
1165     address->m_error = GSOCK_INVPORT;
1166     return GSOCK_INVPORT;
1167   }
1168
1169   se = getservbyname(port, protocol);
1170   if (!se) {
1171     if (isdigit(port[0]))
1172     {
1173       int port_int;
1174
1175       port_int = atoi(port);
1176       addr = (struct sockaddr_in *)address->m_addr;
1177       addr->sin_port = htons(port_int);
1178       return GSOCK_NOERROR;
1179     }
1180
1181     address->m_error = GSOCK_INVPORT;
1182     return GSOCK_INVPORT;
1183   }
1184
1185   addr = (struct sockaddr_in *)address->m_addr;
1186   addr->sin_port = se->s_port;
1187
1188   return GSOCK_NOERROR;
1189 }
1190
1191 GSocketError GAddress_INET_SetPort(GAddress *address, unsigned short port)
1192 {
1193   struct sockaddr_in *addr;
1194
1195   assert(address != NULL);
1196   CHECK_ADDRESS(address, INET, GSOCK_INVADDR);
1197
1198   addr = (struct sockaddr_in *)address->m_addr;
1199   addr->sin_port = htons(port);
1200
1201   return GSOCK_NOERROR;
1202 }
1203
1204 GSocketError GAddress_INET_GetHostName(GAddress *address, char *hostname, size_t sbuf)
1205 {
1206   struct hostent *he;
1207   char *addr_buf;
1208   struct sockaddr_in *addr;
1209
1210   assert(address != NULL);
1211   CHECK_ADDRESS(address, INET, GSOCK_INVADDR);
1212
1213   addr = (struct sockaddr_in *)address->m_addr;
1214   addr_buf = (char *)&(addr->sin_addr);
1215
1216   he = gethostbyaddr(addr_buf, sizeof(addr->sin_addr), AF_INET);
1217   if (he == NULL)
1218   {
1219     address->m_error = GSOCK_NOHOST;
1220     return GSOCK_NOHOST;
1221   }
1222
1223   strncpy(hostname, he->h_name, sbuf);
1224
1225   return GSOCK_NOERROR;
1226 }
1227
1228 unsigned long GAddress_INET_GetHostAddress(GAddress *address)
1229 {
1230   struct sockaddr_in *addr;
1231
1232   assert(address != NULL);
1233   CHECK_ADDRESS(address, INET, 0);
1234
1235   addr = (struct sockaddr_in *)address->m_addr;
1236
1237   return addr->sin_addr.s_addr;
1238 }
1239
1240 unsigned short GAddress_INET_GetPort(GAddress *address)
1241 {
1242   struct sockaddr_in *addr;
1243
1244   assert(address != NULL);
1245   CHECK_ADDRESS(address, INET, 0);
1246
1247   addr = (struct sockaddr_in *)address->m_addr;
1248   return ntohs(addr->sin_port);
1249 }
1250
1251 /*
1252  * -------------------------------------------------------------------------
1253  * Unix address family
1254  * -------------------------------------------------------------------------
1255  */
1256
1257 GSocketError _GAddress_Init_UNIX(GAddress *address)
1258 {
1259   address->m_len  = sizeof(struct sockaddr_un);
1260   address->m_addr = (struct sockaddr *)malloc(address->m_len);
1261   if (address->m_addr == NULL)
1262   {
1263     address->m_error = GSOCK_MEMERR;
1264     return GSOCK_MEMERR;
1265   }
1266
1267   address->m_family = GSOCK_UNIX;
1268   address->m_realfamily = PF_UNIX;
1269   ((struct sockaddr_un *)address->m_addr)->sun_family = AF_UNIX;
1270   ((struct sockaddr_un *)address->m_addr)->sun_path[0] = 0;
1271
1272   return TRUE;
1273 }
1274
1275 GSocketError GAddress_UNIX_SetPath(GAddress *address, const char *path)
1276 {
1277   struct sockaddr_un *addr;
1278
1279   assert(address != NULL);
1280
1281   CHECK_ADDRESS(address, UNIX, GSOCK_INVADDR);
1282
1283   addr = ((struct sockaddr_un *)address->m_addr);
1284   memcpy(addr->sun_path, path, strlen(path));
1285
1286   return GSOCK_NOERROR;
1287 }
1288
1289 GSocketError GAddress_UNIX_GetPath(GAddress *address, char *path, size_t sbuf)
1290 {
1291   struct sockaddr_un *addr;
1292
1293   assert(address != NULL);
1294   CHECK_ADDRESS(address, UNIX, GSOCK_INVADDR);
1295
1296   addr = (struct sockaddr_un *)address->m_addr;
1297
1298   strncpy(path, addr->sun_path, sbuf);
1299
1300   return GSOCK_NOERROR;
1301 }
1302
1303 #endif
1304   /* wxUSE_SOCKETS */