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/ioctl.h>
  15 #include <sys/types.h>
  16 #ifdef vms
  17 #include <socket.h>
  18 #else
  19 #include <sys/socket.h>
  20 #endif
  21 #include <sys/un.h>
  22 #include <sys/time.h>
  23 #include <netinet/in.h>
  24 #include <arpa/inet.h>
  25 #include <netdb.h>
  26 #include <errno.h>
  27
  28 #include <string.h>
  29 #include <unistd.h>
  30 #include <stdio.h>
  31 #include <stdlib.h>
  32 #include <stddef.h>
  33 #include <ctype.h>
  34
  35 #ifdef sun
  36 #    include <sys/filio.h>
  37 #endif
  38
  39 #ifdef sgi
  40 #    include <bstring.h>
  41 #endif
  42
  43 #include <signal.h>
  44
  45 #include "wx/gsocket.h"
  46 #include "gsockunx.h"
  47
  48 #ifndef SOCKLEN_T
  49
  50 #ifdef __GLIBC__
  51 #      if __GLIBC__ == 2
  52 #         define SOCKLEN_T socklen_t
  53 #      endif
  54 #else
  55 #      define SOCKLEN_T int
  56 #endif
  57
  58 #endif
  59
  60 #if !defined(__LINUX__) && !defined(__FREEBSD__)
  61 #   define CAN_USE_TIMEOUT
  62 #elif defined(__GLIBC__) && defined(__GLIBC_MINOR__)
  63 #   if (__GLIBC__ == 2) && (__GLIBC_MINOR__ == 1)
  64 #      define CAN_USE_TIMEOUT
  65 #   endif
  66 #endif
  67
  68 /* Global initialisers */
  69
  70 bool GSocket_Init()
  71 {
  72   return TRUE;
  73 }
  74
  75 void GSocket_Cleanup()
  76 {
  77 }
  78
  79 /* Constructors / Destructors */
  80
  81 GSocket *GSocket_new()
  82 {
  83   int i;
  84   GSocket *socket;
  85
  86   socket = (GSocket *)malloc(sizeof(GSocket));
  87
  88   if (socket == NULL)
  89     return NULL;
  90
  91   socket->m_fd                  = -1;
  92   for (i=0;i<GSOCK_MAX_EVENT;i++) {
  93     socket->m_fbacks[i]         = NULL;
  94     socket->m_iocalls[i]        = FALSE;
  95   }
  96   socket->m_local               = NULL;
  97   socket->m_peer                = NULL;
  98   socket->m_error               = GSOCK_NOERROR;
  99   socket->m_server              = FALSE;
 100   socket->m_stream              = TRUE;
 101   socket->m_gui_dependent       = NULL;
 102   socket->m_blocking            = FALSE;
 103   socket->m_timeout             = 10*60*1000;
 104                                       // 10 minutes * 60 sec * 1000 millisec
 105
 106   /* We initialize the GUI specific entries here */
 107   _GSocket_GUI_Init(socket);
 108
 109   return socket;
 110 }
 111
 112 void GSocket_destroy(GSocket *socket)
 113 {
 114   assert(socket != NULL);
 115
 116   /* First, we check that the socket is really shutdowned */
 117   if (socket->m_fd != -1)
 118     GSocket_Shutdown(socket);
 119
 120   /* We destroy GUI specific variables */
 121   _GSocket_GUI_Destroy(socket);
 122
 123   /* We destroy private addresses */
 124   if (socket->m_local)
 125     GAddress_destroy(socket->m_local);
 126
 127   if (socket->m_peer)
 128     GAddress_destroy(socket->m_peer);
 129
 130   /* We destroy socket itself */
 131   free(socket);
 132 }
 133
 134 void GSocket_Shutdown(GSocket *socket)
 135 {
 136   int evt;
 137
 138   assert(socket != NULL);
 139
 140   /* If socket has been created, we shutdown it */
 141   if (socket->m_fd != -1) {
 142     shutdown(socket->m_fd, 2);
 143     close(socket->m_fd);
 144     socket->m_fd = -1;
 145   }
 146
 147   /* We also disable GUI callbacks */
 148   for (evt=0;evt<GSOCK_MAX_EVENT;evt++)
 149     _GSocket_Uninstall_Callback(socket, evt);
 150 }
 151
 152 /* Address handling */
 153
 154 GSocketError GSocket_SetLocal(GSocket *socket, GAddress *address)
 155 {
 156   assert(socket != NULL);
 157
 158   if ((socket->m_fd != -1 && !socket->m_server)) {
 159     socket->m_error = GSOCK_INVSOCK;
 160     return GSOCK_INVSOCK;
 161   }
 162
 163   if (address == NULL || address->m_family == GSOCK_NOFAMILY) {
 164     socket->m_error = GSOCK_INVADDR;
 165     return GSOCK_INVADDR;
 166   }
 167
 168   if (socket->m_local)
 169     GAddress_destroy(socket->m_local);
 170
 171   socket->m_local = GAddress_copy(address);
 172
 173   return GSOCK_NOERROR;
 174 }
 175
 176 GSocketError GSocket_SetPeer(GSocket *socket, GAddress *address)
 177 {
 178   assert(socket != NULL);
 179
 180   if (address == NULL || address->m_family == GSOCK_NOFAMILY) {
 181     socket->m_error = GSOCK_INVADDR;
 182     return GSOCK_INVADDR;
 183   }
 184
 185   if (socket->m_peer)
 186     GAddress_destroy(socket->m_peer);
 187
 188   socket->m_peer = GAddress_copy(address);
 189
 190   return GSOCK_NOERROR;
 191 }
 192
 193 GAddress *GSocket_GetLocal(GSocket *socket)
 194 {
 195   GAddress *address;
 196   struct sockaddr addr;
 197   SOCKLEN_T size;
 198
 199   assert(socket != NULL);
 200
 201   if (socket->m_local)
 202     return GAddress_copy(socket->m_local);
 203
 204   if (socket->m_fd == -1) {
 205     socket->m_error = GSOCK_INVSOCK;
 206     return NULL;
 207   }
 208
 209   size = sizeof(addr);
 210
 211   if (getsockname(socket->m_fd, &addr, &size) < 0) {
 212     socket->m_error = GSOCK_IOERR;
 213     return NULL;
 214   }
 215
 216   address = GAddress_new();
 217   if (address == NULL) {
 218     socket->m_error = GSOCK_MEMERR;
 219     return NULL;
 220   }
 221   if (_GAddress_translate_from(address, &addr, size) != GSOCK_NOERROR) {
 222     GAddress_destroy(address);
 223     return NULL;
 224   }
 225
 226   return address;
 227 }
 228
 229 GAddress *GSocket_GetPeer(GSocket *socket)
 230 {
 231   assert(socket != NULL);
 232
 233   if (socket->m_peer)
 234     return GAddress_copy(socket->m_peer);
 235
 236   return NULL;
 237 }
 238
 239 /* Server specific parts */
 240
 241 /*
 242   GSocket_SetServer() setup the socket as a server. It uses the "Local" field
 243   of GSocket. "Local" must be set by GSocket_SetLocal() before
 244   GSocket_SetServer() is called. GSOCK_INVSOCK if socket has been initialized.
 245   In case, you haven't yet defined the local address, it returns GSOCK_INVADDR.
 246   In the other cases it returns GSOCK_IOERR.
 247 */
 248 GSocketError GSocket_SetServer(GSocket *sck)
 249 {
 250   int type;
 251
 252   assert(sck != NULL);
 253
 254   if (sck->m_fd != -1) {
 255     sck->m_error = GSOCK_INVSOCK;
 256     return GSOCK_INVSOCK;
 257   }
 258
 259   if (!sck->m_local) {
 260     sck->m_error = GSOCK_INVADDR;
 261     return GSOCK_INVADDR;
 262   }
 263
 264   /* We always have a stream here  */
 265   sck->m_stream = TRUE;
 266
 267   /* Create the socket */
 268   sck->m_fd = socket(sck->m_local->m_realfamily, SOCK_STREAM, 0);
 269
 270   if (sck->m_fd == -1) {
 271     sck->m_error = GSOCK_IOERR;
 272     return GSOCK_IOERR;
 273   }
 274
 275   /* Bind the socket to the LOCAL address */
 276   if (bind(sck->m_fd, sck->m_local->m_addr, sck->m_local->m_len) < 0) {
 277     close(sck->m_fd);
 278     sck->m_fd = -1;
 279     sck->m_error = GSOCK_IOERR;
 280     return GSOCK_IOERR;
 281   }
 282
 283   /* Enable listening up to 5 connections */
 284   if (listen(sck->m_fd, 5) < 0) {
 285     close(sck->m_fd);
 286     sck->m_fd = -1;
 287     sck->m_error = GSOCK_IOERR;
 288     return GSOCK_IOERR;
 289   }
 290
 291   GSocket_SetNonBlocking(sck, sck->m_blocking);
 292   GSocket_SetTimeout(sck, sck->m_timeout);
 293
 294   return GSOCK_NOERROR;
 295 }
 296
 297 /*
 298   GSocket_WaitConnection() waits for an incoming client connection.
 299 */
 300 GSocket *GSocket_WaitConnection(GSocket *socket)
 301 {
 302   GSocket *connection;
 303
 304   assert(socket != NULL);
 305
 306   /* If the socket has already been created, we exit immediately */
 307   if (socket->m_fd == -1 || !socket->m_server) {
 308     socket->m_error = GSOCK_INVSOCK;
 309     return NULL;
 310   }
 311
 312   /* Reenable GSOCK_CONNECTION event */
 313   _GSocket_Enable(socket, GSOCK_CONNECTION);
 314
 315   /* Create a GSocket object for the new connection */
 316   connection = GSocket_new();
 317
 318   /* Accept the incoming connection */
 319   connection->m_fd = accept(socket->m_fd, NULL, NULL);
 320   if (connection->m_fd == -1) {
 321     GSocket_destroy(connection);
 322     socket->m_error = GSOCK_IOERR;
 323     return NULL;
 324   }
 325
 326   /* Initialize all fields */
 327   connection->m_stream   = TRUE;
 328   connection->m_server   = FALSE;
 329   connection->m_oriented = TRUE;
 330
 331   return connection;
 332 }
 333
 334 /* Non oriented connections */
 335
 336 GSocketError GSocket_SetNonOriented(GSocket *sck)
 337 {
 338   assert(sck != NULL);
 339
 340   if (sck->m_fd != -1) {
 341     sck->m_error = GSOCK_INVSOCK;
 342     return GSOCK_INVSOCK;
 343   }
 344
 345   if (!sck->m_local) {
 346     sck->m_error = GSOCK_INVADDR;
 347     return GSOCK_INVADDR;
 348   }
 349
 350   sck->m_stream   = FALSE;
 351   sck->m_server   = FALSE;
 352   sck->m_oriented = FALSE;
 353
 354   /* Create the socket */
 355   sck->m_fd = socket(sck->m_local->m_realfamily, SOCK_DGRAM, 0);
 356
 357   /* Bind it to the LOCAL address */
 358   if (bind(sck->m_fd, sck->m_local->m_addr, sck->m_local->m_len) < 0) {
 359     close(sck->m_fd);
 360     sck->m_fd    = -1;
 361     sck->m_error = GSOCK_IOERR;
 362     return GSOCK_IOERR;
 363   }
 364
 365   GSocket_SetNonBlocking(sck, sck->m_blocking);
 366   GSocket_SetTimeout(sck, sck->m_timeout);
 367
 368   return GSOCK_NOERROR;
 369 }
 370
 371 /* Client specific parts */
 372
 373 /*
 374   GSocket_Connect() establishes a client connection to a server using the "Peer"
 375   field of GSocket. "Peer" must be set by GSocket_SetPeer() before
 376   GSocket_Connect() is called. In the other case, it returns GSOCK_INVADDR.
 377 */
 378 GSocketError GSocket_Connect(GSocket *sck, GSocketStream stream)
 379 {
 380   int type;
 381
 382   assert(sck != NULL);
 383
 384   if (sck->m_fd != -1) {
 385     sck->m_error = GSOCK_INVSOCK;
 386     return GSOCK_INVSOCK;
 387   }
 388
 389   if (!sck->m_peer) {
 390     sck->m_error = GSOCK_INVADDR;
 391     return GSOCK_INVADDR;
 392   }
 393
 394   /* Test whether we want the socket to be a stream (e.g. TCP) */
 395   sck->m_stream = (stream == GSOCK_STREAMED);
 396   sck->m_oriented = TRUE;
 397
 398   if (sck->m_stream)
 399     type = SOCK_STREAM;
 400   else
 401     type = SOCK_DGRAM;
 402
 403   /* Create the socket */
 404   sck->m_fd = socket(sck->m_peer->m_realfamily, type, 0);
 405
 406   if (sck->m_fd == -1) {
 407     sck->m_error = GSOCK_IOERR;
 408     return GSOCK_IOERR;
 409   }
 410
 411   /* Connect it to the PEER address */
 412   if (connect(sck->m_fd, sck->m_peer->m_addr,
 413               sck->m_peer->m_len) != 0) {
 414     close(sck->m_fd);
 415     sck->m_fd = -1;
 416     sck->m_error = GSOCK_IOERR;
 417     return GSOCK_IOERR;
 418   }
 419
 420   /* It is not a server */
 421   sck->m_server = FALSE;
 422
 423   GSocket_SetNonBlocking(sck, sck->m_blocking);
 424   GSocket_SetTimeout(sck, sck->m_timeout);
 425
 426   return GSOCK_NOERROR;
 427 }
 428
 429 /* Generic IO */
 430
 431 /* Like recv(), send(), ... */
 432 int GSocket_Read(GSocket *socket, char *buffer, int size)
 433 {
 434   assert(socket != NULL);
 435
 436   if (socket->m_fd == -1 || socket->m_server) {
 437     socket->m_error = GSOCK_INVSOCK;
 438     return -1;
 439   }
 440
 441   /* Reenable GSOCK_INPUT event */
 442   _GSocket_Enable(socket, GSOCK_INPUT);
 443
 444   if (socket->m_stream)
 445     return _GSocket_Recv_Stream(socket, buffer, size);
 446   else
 447     return _GSocket_Recv_Dgram(socket, buffer, size);
 448 }
 449
 450 int GSocket_Write(GSocket *socket, const char *buffer,
 451                   int size)
 452 {
 453   assert(socket != NULL);
 454
 455   if (socket->m_fd == -1 || socket->m_server) {
 456     socket->m_error = GSOCK_INVSOCK;
 457     return -1;
 458   }
 459
 460   _GSocket_Enable(socket, GSOCK_OUTPUT);
 461
 462   if (socket->m_stream)
 463     return _GSocket_Send_Stream(socket, buffer, size);
 464   else
 465     return _GSocket_Send_Dgram(socket, buffer, size);
 466 }
 467
 468 bool GSocket_DataAvailable(GSocket *socket)
 469 {
 470   fd_set read_set;
 471   struct timeval tv;
 472
 473   assert(socket != NULL);
 474
 475   if (socket->m_fd == -1 || socket->m_server) {
 476     socket->m_error = GSOCK_INVSOCK;
 477     return FALSE;
 478   }
 479
 480   FD_ZERO(&read_set);
 481   FD_SET(socket->m_fd, &read_set);
 482
 483   tv.tv_sec = 0;
 484   tv.tv_usec = 0;
 485
 486   select(socket->m_fd+1, &read_set, NULL, NULL, &tv);
 487
 488   return FD_ISSET(socket->m_fd, &read_set);
 489 }
 490
 491 /* Flags */
 492
 493 /*
 494   GSocket_SetNonBlocking() puts the socket in non-blocking mode. This is useful
 495   if we don't want to wait.
 496 */
 497 void GSocket_SetNonBlocking(GSocket *socket, bool non_block)
 498 {
 499   assert(socket != NULL);
 500
 501   socket->m_blocking = non_block;
 502
 503   if (socket->m_fd != -1)
 504     ioctl(socket->m_fd, FIONBIO, &non_block);
 505 }
 506
 507 /*
 508  * GSocket_SetTimeout()
 509  */
 510
 511 void GSocket_SetTimeout(GSocket *socket, unsigned long millisec)
 512 {
 513   assert(socket != NULL);
 514
 515   socket->m_timeout = millisec;
 516  /* Neither GLIBC 2.0 nor the kernel 2.0.36 define SO_SNDTIMEO or
 517     SO_RCVTIMEO. The man pages, that these flags should exist but
 518     are read only. RR. */
 519  /* OK, restrict this to GLIBC 2.1. GL. */
 520 #ifdef CAN_USE_TIMEOUT
 521   if (socket->m_fd != -1) {
 522     struct timeval tval;
 523
 524     tval.tv_sec = millisec / 1000;
 525     tval.tv_usec = (millisec % 1000) * 1000;
 526     setsockopt(socket->m_fd, SOL_SOCKET, SO_SNDTIMEO, &tval, sizeof(tval));
 527     setsockopt(socket->m_fd, SOL_SOCKET, SO_RCVTIMEO, &tval, sizeof(tval));
 528   }
 529 #endif
 530 }
 531
 532 /*
 533   GSocket_GetError() returns the last error occured on the socket stream.
 534 */
 535
 536 GSocketError GSocket_GetError(GSocket *socket)
 537 {
 538   assert(socket != NULL);
 539
 540   return socket->m_error;
 541 }
 542
 543 /* Callbacks */
 544
 545 /*
 546    Only one fallback is possible for each event (INPUT, OUTPUT, CONNECTION)
 547    INPUT: The function is called when there is at least a byte in the
 548           input buffer
 549    OUTPUT: The function is called when the system is sure the next write call
 550            will not block
 551    CONNECTION: Two cases is possible:
 552              Client socket -> the connection is established
 553              Server socket -> a client request a connection
 554    LOST: the connection is lost
 555
 556    SetCallback accepts a combination of these flags so a same callback can
 557    receive different events.
 558
 559    An event is generated only once and its state is reseted when the relative
 560    IO call is requested.
 561    For example: INPUT -> GSocket_Read()
 562                 CONNECTION -> GSocket_Accept()
 563 */
 564 void GSocket_SetCallback(GSocket *socket, GSocketEventFlags event,
 565                          GSocketCallback fallback, char *cdata)
 566 {
 567   int count;
 568
 569   assert (socket != NULL);
 570
 571   for (count=0;count<GSOCK_MAX_EVENT;count++) {
 572     /* We test each flag and, if it is enabled, we enable the corresponding
 573        event */
 574     if ((event & (1 << count)) != 0) {
 575       socket->m_fbacks[count] = fallback;
 576       socket->m_data[count] = cdata;
 577       _GSocket_Enable(socket, count);
 578     }
 579   }
 580 }
 581
 582 /*
 583   UnsetCallback will disables all fallbacks specified by "event".
 584   NOTE: event may be a combination of flags
 585 */
 586 void GSocket_UnsetCallback(GSocket *socket, GSocketEventFlags event)
 587 {
 588   int count = 0;
 589
 590   assert(socket != NULL);
 591
 592   for (count=0;count<GSOCK_MAX_EVENT;count++) {
 593     if ((event & (1 << count)) != 0) {
 594       _GSocket_Disable(socket, count);
 595       socket->m_fbacks[count] = NULL;
 596     }
 597   }
 598 }
 599
 600 #define CALL_FALLBACK(socket, event) \
 601 if (socket->m_iocalls[event] && \
 602     socket->m_fbacks[event]) {\
 603   _GSocket_Disable(socket, event); \
 604   socket->m_fbacks[event](socket, event, \
 605                    socket->m_data[event]); \
 606 }
 607
 608 #define MASK_SIGNAL() \
 609 { \
 610   void (*old_handler)(int); \
 611 \
 612   old_handler = signal(SIGPIPE, SIG_IGN);
 613
 614 #define UNMASK_SIGNAL() \
 615   signal(SIGPIPE, old_handler); \
 616 }
 617
 618 #if 0
 619 #ifndef CAN_USE_TIMEOUT
 620
 621 #define ENABLE_TIMEOUT(socket) \
 622 { \
 623   struct itimerval old_ival, new_ival; \
 624   void (*old_timer_sig)(int); \
 625 \
 626   new_ival.it_interval.tv_sec = socket->m_timeout / 1000; \
 627   new_ival.it_interval.tv_usec = (socket->m_timeout % 1000) * 1000; \
 628   setitimer(ITIMER_REAL, &new_ival, &old_ival); \
 629   old_timer_sig = signal(SIGALRM, SIG_DFL);
 630
 631 #define DISABLE_TIMEOUT(socket) \
 632   signal(SIGALRM, old_timer_sig); \
 633   setitimer(ITIMER_REAL, &old_ival, NULL); \
 634 }
 635
 636 #else
 637
 638 #define ENABLE_TIMEOUT(s)
 639 #define DISABLE_TIMEOUT(s)
 640
 641 #endif
 642
 643 #endif
 644
 645 /* Temporary */
 646 #define ENABLE_TIMEOUT(s)
 647 #define DISABLE_TIMEOUT(s)
 648
 649 void _GSocket_Enable(GSocket *socket, GSocketEvent event)
 650 {
 651   socket->m_iocalls[event] = TRUE;
 652   if (socket->m_fbacks[event])
 653     _GSocket_Install_Callback(socket, event);
 654 }
 655
 656 void _GSocket_Disable(GSocket *socket, GSocketEvent event)
 657 {
 658   socket->m_iocalls[event] = FALSE;
 659   if (socket->m_fbacks[event])
 660     _GSocket_Uninstall_Callback(socket, event);
 661 }
 662
 663 int _GSocket_Recv_Stream(GSocket *socket, char *buffer, int size)
 664 {
 665   int ret;
 666
 667   MASK_SIGNAL();
 668   ENABLE_TIMEOUT(socket);
 669   ret = recv(socket->m_fd, buffer, size, 0);
 670   DISABLE_TIMEOUT(socket);
 671   UNMASK_SIGNAL();
 672
 673   if (ret == -1 && errno != EAGAIN) {
 674     socket->m_error = GSOCK_IOERR;
 675     return -1;
 676   }
 677   if (errno == EAGAIN) {
 678     socket->m_error = GSOCK_TRYAGAIN;
 679     return -1;
 680   }
 681   return ret;
 682 }
 683
 684 int _GSocket_Recv_Dgram(GSocket *socket, char *buffer, int size)
 685 {
 686   struct sockaddr from;
 687   SOCKLEN_T fromlen;
 688   int ret;
 689
 690   fromlen = sizeof(from);
 691
 692   MASK_SIGNAL();
 693   ENABLE_TIMEOUT(socket);
 694   ret = recvfrom(socket->m_fd, buffer, size, 0, &from, &fromlen);
 695   DISABLE_TIMEOUT(socket);
 696   UNMASK_SIGNAL();
 697   if (ret == -1 && errno != EAGAIN) {
 698     socket->m_error = GSOCK_IOERR;
 699     return -1;
 700   }
 701   if (errno == EAGAIN) {
 702     socket->m_error = GSOCK_TRYAGAIN;
 703     return -1;
 704   }
 705
 706   /* Translate a system address into a GSocket address */
 707   if (!socket->m_peer) {
 708     socket->m_peer = GAddress_new();
 709     if (!socket->m_peer) {
 710       socket->m_error = GSOCK_MEMERR;
 711       return -1;
 712     }
 713   }
 714   if (_GAddress_translate_from(socket->m_peer, &from, fromlen) != GSOCK_NOERROR)
 715     return -1;
 716
 717   return ret;
 718 }
 719
 720 int _GSocket_Send_Stream(GSocket *socket, const char *buffer, int size)
 721 {
 722   int ret;
 723
 724   MASK_SIGNAL();
 725   ENABLE_TIMEOUT(socket);
 726   ret = send(socket->m_fd, buffer, size, 0);
 727   DISABLE_TIMEOUT(socket);
 728   UNMASK_SIGNAL();
 729   if (ret == -1 && errno != EAGAIN) {
 730     socket->m_error = GSOCK_IOERR;
 731     return -1;
 732   }
 733   if (errno == EAGAIN) {
 734     socket->m_error = GSOCK_TRYAGAIN;
 735     return -1;
 736   }
 737   return ret;
 738 }
 739
 740 int _GSocket_Send_Dgram(GSocket *socket, const char *buffer, int size)
 741 {
 742   struct sockaddr *addr;
 743   int len, ret;
 744
 745   if (!socket->m_peer) {
 746     socket->m_error = GSOCK_INVADDR;
 747     return -1;
 748   }
 749
 750   if (_GAddress_translate_to(socket->m_peer, &addr, &len) != GSOCK_NOERROR) {
 751     return -1;
 752   }
 753
 754   MASK_SIGNAL();
 755   ENABLE_TIMEOUT(socket);
 756   ret = sendto(socket->m_fd, buffer, size, 0, addr, len);
 757   DISABLE_TIMEOUT(socket);
 758   UNMASK_SIGNAL();
 759
 760   /* Frees memory allocated from _GAddress_translate_to */
 761   free(addr);
 762
 763   if (ret == -1 && errno != EAGAIN) {
 764     socket->m_error = GSOCK_IOERR;
 765     return -1;
 766   }
 767   if (errno == EAGAIN) {
 768     socket->m_error = GSOCK_TRYAGAIN;
 769     return -1;
 770   }
 771
 772   return ret;
 773 }
 774
 775 void _GSocket_Detected_Read(GSocket *socket)
 776 {
 777   char c;
 778   int ret;
 779
 780   if (socket->m_stream) {
 781     ret = recv(socket->m_fd, &c, 1, MSG_PEEK);
 782
 783     if (ret < 0 && socket->m_server) {
 784       CALL_FALLBACK(socket, GSOCK_CONNECTION);
 785       return;
 786     }
 787
 788     if (ret > 0) {
 789       CALL_FALLBACK(socket, GSOCK_INPUT);
 790     } else {
 791       CALL_FALLBACK(socket, GSOCK_LOST);
 792     }
 793   }
 794 }
 795
 796 void _GSocket_Detected_Write(GSocket *socket)
 797 {
 798   CALL_FALLBACK(socket, GSOCK_OUTPUT);
 799 }
 800
 801 #undef CALL_FALLBACK
 802 #undef MASK_SIGNAL
 803 #undef UNMASK_SIGNAL
 804
 805 /*
 806  * -------------------------------------------------------------------------
 807  * GAddress
 808  * -------------------------------------------------------------------------
 809  */
 810
 811 /* CHECK_ADDRESS verifies that the current family is either GSOCK_NOFAMILY or
 812  * GSOCK_*family*. In case it is GSOCK_NOFAMILY, it initializes address to be
 813  * a GSOCK_*family*. In other cases, it returns GSOCK_INVADDR.
 814  */
 815 #define CHECK_ADDRESS(address, family, retval) \
 816 { \
 817   if (address->m_family == GSOCK_NOFAMILY) \
 818     if (_GAddress_Init_##family(address) != GSOCK_NOERROR) {\
 819       return address->m_error; \
 820     }\
 821   if (address->m_family != GSOCK_##family) {\
 822     address->m_error = GSOCK_INVADDR; \
 823     return retval; \
 824   } \
 825 }
 826
 827 GAddress *GAddress_new()
 828 {
 829   GAddress *address;
 830
 831   address = (GAddress *)malloc(sizeof(GAddress));
 832
 833   if (address == NULL)
 834     return NULL;
 835
 836   address->m_family  = GSOCK_NOFAMILY;
 837   address->m_addr    = NULL;
 838   address->m_len     = 0;
 839
 840   return address;
 841 }
 842
 843 GAddress *GAddress_copy(GAddress *address)
 844 {
 845   GAddress *addr2;
 846
 847   assert(address != NULL);
 848
 849   addr2 = (GAddress *)malloc(sizeof(GAddress));
 850
 851   if (addr2 == NULL)
 852     return NULL;
 853
 854   memcpy(addr2, address, sizeof(GAddress));
 855
 856   if (address->m_addr) {
 857     addr2->m_addr = (struct sockaddr *)malloc(addr2->m_len);
 858     if (addr2->m_addr == NULL) {
 859       free(addr2);
 860       return NULL;
 861     }
 862     memcpy(addr2->m_addr, address->m_addr, addr2->m_len);
 863   }
 864
 865   return addr2;
 866 }
 867
 868 void GAddress_destroy(GAddress *address)
 869 {
 870   assert(address != NULL);
 871
 872   free(address);
 873 }
 874
 875 void GAddress_SetFamily(GAddress *address, GAddressType type)
 876 {
 877   assert(address != NULL);
 878
 879   address->m_family = type;
 880 }
 881
 882 GAddressType GAddress_GetFamily(GAddress *address)
 883 {
 884   assert(address != NULL);
 885
 886   return address->m_family;
 887 }
 888
 889 GSocketError _GAddress_translate_from(GAddress *address, struct sockaddr *addr, int len){
 890   address->m_realfamily = addr->sa_family;
 891   switch (addr->sa_family) {
 892   case AF_INET:
 893     address->m_family = GSOCK_INET;
 894     break;
 895   case AF_UNIX:
 896     address->m_family = GSOCK_UNIX;
 897     break;
 898 #ifdef AF_INET6
 899   case AF_INET6:
 900     address->m_family = GSOCK_INET6;
 901     break;
 902 #endif
 903   default:
 904     {
 905     address->m_error = GSOCK_INVOP;
 906     return GSOCK_INVOP;
 907     }
 908   }
 909
 910   if (address->m_addr)
 911     free(address->m_addr);
 912
 913   address->m_len  = len;
 914   address->m_addr = (struct sockaddr *)malloc(len);
 915   if (address->m_addr == NULL) {
 916     address->m_error = GSOCK_MEMERR;
 917     return GSOCK_MEMERR;
 918   }
 919   memcpy(address->m_addr, addr, len);
 920
 921   return GSOCK_NOERROR;
 922 }
 923
 924 GSocketError _GAddress_translate_to(GAddress *address,
 925                                     struct sockaddr **addr, int *len)
 926 {
 927   if (!address->m_addr) {
 928     address->m_error = GSOCK_INVADDR;
 929     return GSOCK_INVADDR;
 930   }
 931
 932   *len = address->m_len;
 933   *addr = (struct sockaddr *)malloc(address->m_len);
 934   if (*addr == NULL) {
 935     address->m_error = GSOCK_MEMERR;
 936     return GSOCK_MEMERR;
 937   }
 938
 939   memcpy(*addr, address->m_addr, address->m_len);
 940   return GSOCK_NOERROR;
 941 }
 942
 943 /*
 944  * -------------------------------------------------------------------------
 945  * Internet address family
 946  * -------------------------------------------------------------------------
 947  */
 948
 949 GSocketError _GAddress_Init_INET(GAddress *address)
 950 {
 951   address->m_addr = (struct sockaddr *)malloc(sizeof(struct sockaddr_in));
 952   if (address->m_addr == NULL) {
 953     address->m_error = GSOCK_MEMERR;
 954     return GSOCK_MEMERR;
 955   }
 956
 957   address->m_len  = sizeof(struct sockaddr_in);
 958
 959   address->m_family = GSOCK_INET;
 960   address->m_realfamily = PF_INET;
 961   ((struct sockaddr_in *)address->m_addr)->sin_family = AF_INET;
 962   ((struct sockaddr_in *)address->m_addr)->sin_addr.s_addr   = INADDR_ANY;
 963
 964   return TRUE;
 965 }
 966
 967 GSocketError GAddress_INET_SetHostName(GAddress *address, const char *hostname)
 968 {
 969   struct hostent *he;
 970   struct in_addr *addr;
 971
 972   assert(address != NULL);
 973
 974   CHECK_ADDRESS(address, INET, GSOCK_INVADDR);
 975
 976   addr = &(((struct sockaddr_in *)address->m_addr)->sin_addr);
 977
 978   /* If it is a numeric host name, convert it now */
 979   if (inet_aton(hostname, addr) == 0) {
 980     struct in_addr *array_addr;
 981
 982     /* It is a real name, we solve it */
 983     if ((he = gethostbyname(hostname)) == NULL) {
 984       address->m_error = GSOCK_NOHOST;
 985       return GSOCK_NOHOST;
 986     }
 987     array_addr = (struct in_addr *) *(he->h_addr_list);
 988     addr->s_addr = array_addr[0].s_addr;
 989   }
 990   return GSOCK_NOERROR;
 991 }
 992
 993 GSocketError GAddress_INET_SetHostAddress(GAddress *address,
 994                                           unsigned long hostaddr)
 995 {
 996   struct in_addr *addr;
 997
 998   assert(address != NULL);
 999
1000   CHECK_ADDRESS(address, INET, GSOCK_INVADDR);
1001
1002   addr = &(((struct sockaddr_in *)address->m_addr)->sin_addr);
1003   addr->s_addr = hostaddr;
1004
1005   return GSOCK_NOERROR;
1006 }
1007
1008 GSocketError GAddress_INET_SetPortName(GAddress *address, const char *port,
1009                                        const char *protocol)
1010 {
1011   struct servent *se;
1012   struct sockaddr_in *addr;
1013
1014   assert(address != NULL);
1015   CHECK_ADDRESS(address, INET, GSOCK_INVADDR);
1016
1017   if (!port) {
1018     address->m_error = GSOCK_INVPORT;
1019     return GSOCK_INVPORT;
1020   }
1021
1022   se = getservbyname(port, protocol);
1023   if (!se) {
1024     if (isdigit(port[0])) {
1025       int port_int;
1026
1027       port_int = atoi(port);
1028       addr = (struct sockaddr_in *)address->m_addr;
1029       addr->sin_port = htons(port_int);
1030       return GSOCK_NOERROR;
1031     }
1032
1033     address->m_error = GSOCK_INVPORT;
1034     return GSOCK_INVPORT;
1035   }
1036
1037   addr = (struct sockaddr_in *)address->m_addr;
1038   addr->sin_port = se->s_port;
1039
1040   return GSOCK_NOERROR;
1041 }
1042
1043 GSocketError GAddress_INET_SetPort(GAddress *address, unsigned short port)
1044 {
1045   struct sockaddr_in *addr;
1046
1047   assert(address != NULL);
1048   CHECK_ADDRESS(address, INET, GSOCK_INVADDR);
1049
1050   addr = (struct sockaddr_in *)address->m_addr;
1051   addr->sin_port = htons(port);
1052
1053   return GSOCK_NOERROR;
1054 }
1055
1056 GSocketError GAddress_INET_GetHostName(GAddress *address, char *hostname, size_t sbuf)
1057 {
1058   struct hostent *he;
1059   char *addr_buf;
1060   struct sockaddr_in *addr;
1061
1062   assert(address != NULL);
1063   CHECK_ADDRESS(address, INET, GSOCK_INVADDR);
1064
1065   addr = (struct sockaddr_in *)address->m_addr;
1066   addr_buf = (char *)&(addr->sin_addr);
1067
1068   he       = gethostbyaddr(addr_buf, sizeof(addr->sin_addr), AF_INET);
1069   if (he == NULL) {
1070     address->m_error = GSOCK_NOHOST;
1071     return GSOCK_NOHOST;
1072   }
1073
1074   strncpy(hostname, he->h_name, sbuf);
1075
1076   return GSOCK_NOERROR;
1077 }
1078
1079 unsigned long GAddress_INET_GetHostAddress(GAddress *address)
1080 {
1081   struct sockaddr_in *addr;
1082
1083   assert(address != NULL);
1084   CHECK_ADDRESS(address, INET, 0);
1085
1086   addr = (struct sockaddr_in *)address->m_addr;
1087
1088   return addr->sin_addr.s_addr;
1089 }
1090
1091 unsigned short GAddress_INET_GetPort(GAddress *address)
1092 {
1093   struct sockaddr_in *addr;
1094
1095   assert(address != NULL);
1096   CHECK_ADDRESS(address, INET, 0);
1097
1098   addr = (struct sockaddr_in *)address->m_addr;
1099   return ntohs(addr->sin_port);
1100 }
1101
1102 /*
1103  * -------------------------------------------------------------------------
1104  * Unix address family
1105  * -------------------------------------------------------------------------
1106  */
1107
1108 GSocketError _GAddress_Init_UNIX(GAddress *address)
1109 {
1110   address->m_addr = (struct sockaddr *)malloc(address->m_len);
1111   if (address->m_addr == NULL) {
1112     address->m_error = GSOCK_MEMERR;
1113     return GSOCK_MEMERR;
1114   }
1115
1116   address->m_len  = sizeof(struct sockaddr_un);
1117   address->m_family = GSOCK_UNIX;
1118   address->m_realfamily = PF_UNIX;
1119   ((struct sockaddr_un *)address->m_addr)->sun_family = AF_UNIX;
1120   ((struct sockaddr_un *)address->m_addr)->sun_path[0] = 0;
1121
1122   return TRUE;
1123 }
1124
1125 GSocketError GAddress_UNIX_SetPath(GAddress *address, const char *path)
1126 {
1127   struct sockaddr_un *addr;
1128
1129   assert(address != NULL);
1130
1131   CHECK_ADDRESS(address, UNIX, GSOCK_INVADDR);
1132
1133   addr = ((struct sockaddr_un *)address->m_addr);
1134   memcpy(addr->sun_path, path, strlen(path));
1135
1136   return GSOCK_NOERROR;
1137 }
1138
1139 GSocketError GAddress_UNIX_GetPath(GAddress *address, char *path, size_t sbuf)
1140 {
1141   struct sockaddr_un *addr;
1142
1143   assert(address != NULL);
1144   CHECK_ADDRESS(address, UNIX, GSOCK_INVADDR);
1145
1146   addr = (struct sockaddr_un *)address->m_addr;
1147
1148   strncpy(path, addr->sun_path, sbuf);
1149
1150   return GSOCK_NOERROR;
1151 }
1152
1153 #endif // wxUSE_SOCKETS