src/msw/sockmsw.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:       src/msw/sockmsw.cpp
   3 // Purpose:    MSW-specific socket code
   4 // Authors:    Guilhem Lavaux, Guillermo Rodriguez Garcia
   5 // Created:    April 1997
   6 // Copyright:  (C) 1999-1997, Guilhem Lavaux
   7 //             (C) 1999-2000, Guillermo Rodriguez Garcia
   8 //             (C) 2008 Vadim Zeitlin
   9 // RCS_ID:     $Id$
  10 // License:    wxWindows licence
  11 /////////////////////////////////////////////////////////////////////////////
  12
  13
  14 // For compilers that support precompilation, includes "wx.h".
  15 #include "wx/wxprec.h"
  16
  17 #ifdef __BORLANDC__
  18     #pragma hdrstop
  19 #endif
  20
  21 #if wxUSE_SOCKETS
  22
  23 /* including rasasync.h (included from windows.h itself included from
  24  * wx/setup.h and/or winsock.h results in this warning for
  25  * RPCNOTIFICATION_ROUTINE
  26  */
  27 #ifdef _MSC_VER
  28 #   pragma warning(disable:4115) /* named type definition in parentheses */
  29 #endif
  30
  31 #include "wx/private/socket.h"
  32 #include "wx/msw/private.h"     // for wxGetInstance()
  33 #include "wx/apptrait.h"
  34 #include "wx/thread.h"
  35 #include "wx/dynlib.h"
  36
  37 #ifdef __WXWINCE__
  38 /*
  39  * As WSAAsyncSelect is not present on WinCE, it now uses WSACreateEvent,
  40  * WSAEventSelect, WSAWaitForMultipleEvents and WSAEnumNetworkEvents. When
  41  * enabling eventhandling for a socket a new thread it created that keeps track
  42  * of the events and posts a messageto the hidden window to use the standard
  43  * message loop.
  44  */
  45 #include "wx/msw/wince/net.h"
  46 #include "wx/hashmap.h"
  47 WX_DECLARE_HASH_MAP(int,bool,wxIntegerHash,wxIntegerEqual,SocketHash);
  48
  49 #ifndef isdigit
  50 #define isdigit(x) (x > 47 && x < 58)
  51 #endif
  52 #include "wx/msw/wince/net.h"
  53
  54 #endif // __WXWINCE__
  55
  56 #ifdef _MSC_VER
  57 #  pragma warning(default:4115) /* named type definition in parentheses */
  58 #endif
  59
  60 #define CLASSNAME  TEXT("_wxSocket_Internal_Window_Class")
  61
  62 /* implemented in utils.cpp */
  63 extern "C" WXDLLIMPEXP_BASE HWND
  64 wxCreateHiddenWindow(LPCTSTR *pclassname, LPCTSTR classname, WNDPROC wndproc);
  65
  66 /* Maximum number of different wxSocket objects at a given time.
  67  * This value can be modified at will, but it CANNOT be greater
  68  * than (0x7FFF - WM_USER + 1)
  69  */
  70 #define MAXSOCKETS 1024
  71
  72 #if (MAXSOCKETS > (0x7FFF - WM_USER + 1))
  73 #error "MAXSOCKETS is too big!"
  74 #endif
  75
  76 #ifndef __WXWINCE__
  77 typedef int (PASCAL *WSAAsyncSelect_t)(SOCKET,HWND,u_int,long);
  78 #else
  79 /* Typedef the needed function prototypes and the WSANETWORKEVENTS structure
  80 */
  81 typedef struct _WSANETWORKEVENTS {
  82        long lNetworkEvents;
  83        int iErrorCode[10];
  84 } WSANETWORKEVENTS, FAR * LPWSANETWORKEVENTS;
  85 typedef HANDLE (PASCAL *WSACreateEvent_t)();
  86 typedef int (PASCAL *WSAEventSelect_t)(SOCKET,HANDLE,long);
  87 typedef int (PASCAL *WSAWaitForMultipleEvents_t)(long,HANDLE,BOOL,long,BOOL);
  88 typedef int (PASCAL *WSAEnumNetworkEvents_t)(SOCKET,HANDLE,LPWSANETWORKEVENTS);
  89 #endif //__WXWINCE__
  90
  91 LRESULT CALLBACK wxSocket_Internal_WinProc(HWND, UINT, WPARAM, LPARAM);
  92
  93 /* Global variables */
  94
  95 static HWND hWin;
  96 wxCRIT_SECT_DECLARE_MEMBER(gs_critical);
  97 static wxSocketImplMSW *socketList[MAXSOCKETS];
  98 static int firstAvailable;
  99
 100 #ifndef __WXWINCE__
 101 static WSAAsyncSelect_t gs_WSAAsyncSelect = NULL;
 102 #else
 103 static SocketHash socketHash;
 104 static unsigned int currSocket;
 105 HANDLE hThread[MAXSOCKETS];
 106 static WSACreateEvent_t gs_WSACreateEvent = NULL;
 107 static WSAEventSelect_t gs_WSAEventSelect = NULL;
 108 static WSAWaitForMultipleEvents_t gs_WSAWaitForMultipleEvents = NULL;
 109 static WSAEnumNetworkEvents_t gs_WSAEnumNetworkEvents = NULL;
 110 /* This structure will be used to pass data on to the thread that handles socket events.
 111 */
 112 typedef struct thread_data{
 113     HWND hEvtWin;
 114     unsigned long msgnumber;
 115     unsigned long fd;
 116     unsigned long lEvent;
 117 }thread_data;
 118 #endif
 119
 120 #ifdef __WXWINCE__
 121 /* This thread handles socket events on WinCE using WSAEventSelect() as
 122  * WSAAsyncSelect is not supported. When an event occurs for the socket, it is
 123  * checked what kind of event happend and the correct message gets posted so
 124  * that the hidden window can handle it as it would in other MSW builds.
 125 */
 126 DWORD WINAPI SocketThread(LPVOID data)
 127 {
 128     WSANETWORKEVENTS NetworkEvents;
 129     thread_data* d = (thread_data *)data;
 130
 131     HANDLE NetworkEvent = gs_WSACreateEvent();
 132     gs_WSAEventSelect(d->fd, NetworkEvent, d->lEvent);
 133
 134     while(socketHash[d->fd] == true)
 135     {
 136         if ((gs_WSAWaitForMultipleEvents(1, &NetworkEvent, FALSE,INFINITE, FALSE)) == WAIT_FAILED)
 137         {
 138             printf("WSAWaitForMultipleEvents failed with error %d\n", WSAGetLastError());
 139             return 0;
 140         }
 141         if (gs_WSAEnumNetworkEvents(d->fd ,NetworkEvent, &NetworkEvents) == SOCKET_ERROR)
 142         {
 143             printf("WSAEnumNetworkEvents failed with error %d\n", WSAGetLastError());
 144             return 0;
 145         }
 146
 147         long flags = NetworkEvents.lNetworkEvents;
 148         if (flags & FD_READ)
 149             ::PostMessage(d->hEvtWin, d->msgnumber,d->fd, FD_READ);
 150         if (flags & FD_WRITE)
 151             ::PostMessage(d->hEvtWin, d->msgnumber,d->fd, FD_WRITE);
 152         if (flags & FD_OOB)
 153             ::PostMessage(d->hEvtWin, d->msgnumber,d->fd, FD_OOB);
 154         if (flags & FD_ACCEPT)
 155             ::PostMessage(d->hEvtWin, d->msgnumber,d->fd, FD_ACCEPT);
 156         if (flags & FD_CONNECT)
 157             ::PostMessage(d->hEvtWin, d->msgnumber,d->fd, FD_CONNECT);
 158         if (flags & FD_CLOSE)
 159             ::PostMessage(d->hEvtWin, d->msgnumber,d->fd, FD_CLOSE);
 160
 161     }
 162     gs_WSAEventSelect(d->fd, NetworkEvent, 0);
 163     ExitThread(0);
 164     return 0;
 165 }
 166 #endif
 167
 168 // ----------------------------------------------------------------------------
 169 // MSW implementation of wxSocketManager
 170 // ----------------------------------------------------------------------------
 171
 172 class wxSocketMSWManager : public wxSocketManager
 173 {
 174 public:
 175     virtual bool OnInit();
 176     virtual void OnExit();
 177
 178     virtual wxSocketImpl *CreateSocket(wxSocketBase& wxsocket)
 179     {
 180         return new wxSocketImplMSW(wxsocket);
 181     }
 182     virtual void Install_Callback(wxSocketImpl *socket, wxSocketNotify event);
 183     virtual void Uninstall_Callback(wxSocketImpl *socket, wxSocketNotify event);
 184
 185 private:
 186     static wxDynamicLibrary gs_wsock32dll;
 187 };
 188
 189 wxDynamicLibrary wxSocketMSWManager::gs_wsock32dll;
 190
 191 bool wxSocketMSWManager::OnInit()
 192 {
 193   static LPCTSTR pclassname = NULL;
 194   int i;
 195
 196   /* Create internal window for event notifications */
 197   hWin = wxCreateHiddenWindow(&pclassname, CLASSNAME, wxSocket_Internal_WinProc);
 198   if (!hWin)
 199       return false;
 200
 201   /* Initialize socket list */
 202   for (i = 0; i < MAXSOCKETS; i++)
 203   {
 204     socketList[i] = NULL;
 205   }
 206   firstAvailable = 0;
 207
 208   // we don't link with wsock32.dll (or ws2 in CE case) statically to avoid
 209   // dependencies on it for all the application using wx even if they don't use
 210   // sockets
 211 #ifdef __WXWINCE__
 212     #define WINSOCK_DLL_NAME _T("ws2.dll")
 213 #else
 214     #define WINSOCK_DLL_NAME _T("wsock32.dll")
 215 #endif
 216
 217     gs_wsock32dll.Load(WINSOCK_DLL_NAME, wxDL_VERBATIM | wxDL_QUIET);
 218     if ( !gs_wsock32dll.IsLoaded() )
 219         return false;
 220
 221 #ifndef __WXWINCE__
 222     wxDL_INIT_FUNC(gs_, WSAAsyncSelect, gs_wsock32dll);
 223     if ( !gs_WSAAsyncSelect )
 224         return false;
 225 #else
 226     wxDL_INIT_FUNC(gs_, WSAEventSelect, gs_wsock32dll);
 227     if ( !gs_WSAEventSelect )
 228         return false;
 229
 230     wxDL_INIT_FUNC(gs_, WSACreateEvent, gs_wsock32dll);
 231     if ( !gs_WSACreateEvent )
 232         return false;
 233
 234     wxDL_INIT_FUNC(gs_, WSAWaitForMultipleEvents, gs_wsock32dll);
 235     if ( !gs_WSAWaitForMultipleEvents )
 236         return false;
 237
 238     wxDL_INIT_FUNC(gs_, WSAEnumNetworkEvents, gs_wsock32dll);
 239     if ( !gs_WSAEnumNetworkEvents )
 240         return false;
 241
 242     currSocket = 0;
 243 #endif // !__WXWINCE__/__WXWINCE__
 244
 245   // finally initialize WinSock
 246   WSADATA wsaData;
 247   return WSAStartup((1 << 8) | 1, &wsaData) == 0;
 248 }
 249
 250 void wxSocketMSWManager::OnExit()
 251 {
 252 #ifdef __WXWINCE__
 253 /* Delete the threads here */
 254     for(unsigned int i=0; i < currSocket; i++)
 255         CloseHandle(hThread[i]);
 256 #endif
 257   /* Destroy internal window */
 258   DestroyWindow(hWin);
 259   UnregisterClass(CLASSNAME, wxGetInstance());
 260
 261   WSACleanup();
 262
 263   gs_wsock32dll.Unload();
 264 }
 265
 266 /* Per-socket GUI initialization / cleanup */
 267
 268 wxSocketImplMSW::wxSocketImplMSW(wxSocketBase& wxsocket)
 269     : wxSocketImpl(wxsocket)
 270 {
 271   /* Allocate a new message number for this socket */
 272   wxCRIT_SECT_LOCKER(lock, gs_critical);
 273
 274   int i = firstAvailable;
 275   while (socketList[i] != NULL)
 276   {
 277     i = (i + 1) % MAXSOCKETS;
 278
 279     if (i == firstAvailable)    /* abort! */
 280     {
 281       m_msgnumber = 0; // invalid
 282       return;
 283     }
 284   }
 285   socketList[i] = this;
 286   firstAvailable = (i + 1) % MAXSOCKETS;
 287   m_msgnumber = (i + WM_USER);
 288 }
 289
 290 wxSocketImplMSW::~wxSocketImplMSW()
 291 {
 292   /* Remove the socket from the list */
 293   wxCRIT_SECT_LOCKER(lock, gs_critical);
 294
 295   if ( m_msgnumber )
 296   {
 297       // we need to remove any pending messages for this socket to avoid having
 298       // them sent to a new socket which could reuse the same message number as
 299       // soon as we destroy this one
 300       MSG msg;
 301       while ( ::PeekMessage(&msg, hWin, m_msgnumber, m_msgnumber, PM_REMOVE) )
 302           ;
 303
 304       socketList[m_msgnumber - WM_USER] = NULL;
 305   }
 306   //else: the socket has never been created successfully
 307 }
 308
 309 /* Windows proc for asynchronous event handling */
 310
 311 LRESULT CALLBACK wxSocket_Internal_WinProc(HWND hWnd,
 312                                            UINT uMsg,
 313                                            WPARAM wParam,
 314                                            LPARAM lParam)
 315 {
 316     if ( uMsg < WM_USER || uMsg > (WM_USER + MAXSOCKETS - 1))
 317         return DefWindowProc(hWnd, uMsg, wParam, lParam);
 318
 319     wxSocketImplMSW *socket;
 320     wxSocketNotify event;
 321     {
 322         wxCRIT_SECT_LOCKER(lock, gs_critical);
 323
 324         socket = socketList[(uMsg - WM_USER)];
 325         event = (wxSocketNotify) -1;
 326
 327         /* Check that the socket still exists (it has not been
 328          * destroyed) and for safety, check that the m_fd field
 329          * is what we expect it to be.
 330          */
 331         if ((socket != NULL) && ((WPARAM)socket->m_fd == wParam))
 332         {
 333             switch WSAGETSELECTEVENT(lParam)
 334             {
 335                 case FD_READ:    event = wxSOCKET_INPUT; break;
 336                 case FD_WRITE:   event = wxSOCKET_OUTPUT; break;
 337                 case FD_ACCEPT:  event = wxSOCKET_CONNECTION; break;
 338                 case FD_CONNECT:
 339                                  {
 340                                      if (WSAGETSELECTERROR(lParam) != 0)
 341                                          event = wxSOCKET_LOST;
 342                                      else
 343                                          event = wxSOCKET_CONNECTION;
 344                                      break;
 345                                  }
 346                 case FD_CLOSE:   event = wxSOCKET_LOST; break;
 347             }
 348
 349             if (event != -1)
 350             {
 351                 if (event == wxSOCKET_LOST)
 352                     socket->m_detected = wxSOCKET_LOST_FLAG;
 353                 else
 354                     socket->m_detected |= (1 << event);
 355             }
 356         }
 357     } // unlock gs_critical
 358
 359     if ( socket )
 360         socket->NotifyOnStateChange(event);
 361
 362     return (LRESULT) 0;
 363 }
 364
 365 /*
 366  *  Enable all event notifications; we need to be notified of all
 367  *  events for internal processing, but we will only notify users
 368  *  when an appropriate callback function has been installed.
 369  */
 370 void wxSocketMSWManager::Install_Callback(wxSocketImpl *socket_,
 371                                          wxSocketNotify WXUNUSED(event))
 372 {
 373     wxSocketImplMSW * const socket = static_cast<wxSocketImplMSW *>(socket_);
 374
 375   if (socket->m_fd != INVALID_SOCKET)
 376   {
 377     /* We could probably just subscribe to all events regardless
 378      * of the socket type, but MS recommends to do it this way.
 379      */
 380     long lEvent = socket->m_server?
 381                   FD_ACCEPT : (FD_READ | FD_WRITE | FD_CONNECT | FD_CLOSE);
 382 #ifndef __WXWINCE__
 383     gs_WSAAsyncSelect(socket->m_fd, hWin, socket->m_msgnumber, lEvent);
 384 #else
 385 /*
 386 *  WinCE creates a thread for socket event handling.
 387 *  All needed parameters get passed through the thread_data structure.
 388 */
 389
 390     thread_data* d = new thread_data;
 391     d->lEvent = lEvent;
 392     d->hEvtWin = hWin;
 393     d->msgnumber = socket->m_msgnumber;
 394     d->fd = socket->m_fd;
 395     socketHash[socket->m_fd] = true;
 396     hThread[currSocket++] = CreateThread(NULL, 0, &SocketThread,(LPVOID)d, 0, NULL);
 397 #endif
 398   }
 399 }
 400
 401 /*
 402  *  Disable event notifications (used when shutting down the socket)
 403  */
 404 void wxSocketMSWManager::Uninstall_Callback(wxSocketImpl *socket_,
 405                                            wxSocketNotify WXUNUSED(event))
 406 {
 407     wxSocketImplMSW * const socket = static_cast<wxSocketImplMSW *>(socket_);
 408
 409   if (socket->m_fd != INVALID_SOCKET)
 410   {
 411 #ifndef __WXWINCE__
 412     gs_WSAAsyncSelect(socket->m_fd, hWin, socket->m_msgnumber, 0);
 413 #else
 414     //Destroy the thread
 415     socketHash[socket->m_fd] = false;
 416 #endif
 417   }
 418 }
 419
 420 // set the wxBase variable to point to our wxSocketManager implementation
 421 //
 422 // see comments in wx/apptrait.h for the explanation of why do we do it
 423 // like this
 424 static struct ManagerSetter
 425 {
 426     ManagerSetter()
 427     {
 428         static wxSocketMSWManager s_manager;
 429         wxAppTraits::SetDefaultSocketManager(&s_manager);
 430     }
 431 } gs_managerSetter;
 432
 433 // ============================================================================
 434 // wxSocketImpl implementation
 435 // ============================================================================
 436
 437 /* static */
 438 wxSocketImpl *wxSocketImpl::Create(wxSocketBase& wxsocket)
 439 {
 440     return new wxSocketImplMSW(wxsocket);
 441 }
 442
 443 void wxSocketImplMSW::DoClose()
 444 {
 445     wxSocketManager::Get()->
 446         Uninstall_Callback(this, wxSOCKET_MAX_EVENT /* unused anyhow */);
 447
 448     closesocket(m_fd);
 449 }
 450
 451 wxSocketError wxSocketImplUnix::GetLastError() const
 452 {
 453     switch ( WSAGetLastError() )
 454     {
 455         case 0:
 456             return wxSOCKET_NOERROR;
 457
 458         case WSAENOTSOCK:
 459             return wxSOCKET_INVSOCK;
 460
 461         case WSAEWOULDBLOCK:
 462             return wxSOCKET_WOULDBLOCK;
 463
 464         default:
 465             return wxSOCKET_IOERR;
 466     }
 467 }
 468
 469 /* Generic IO */
 470
 471 /* Like recv(), send(), ... */
 472 int wxSocketImplMSW::Read(void *buffer, int size)
 473 {
 474   int ret;
 475
 476   /* Reenable INPUT events */
 477   m_detected &= ~wxSOCKET_INPUT_FLAG;
 478
 479   if (m_fd == INVALID_SOCKET || m_server)
 480   {
 481     m_error = wxSOCKET_INVSOCK;
 482     return -1;
 483   }
 484
 485   /* Read the data */
 486   if (m_stream)
 487     ret = Recv_Stream(buffer, size);
 488   else
 489     ret = Recv_Dgram(buffer, size);
 490
 491   if (ret == SOCKET_ERROR)
 492   {
 493     if (WSAGetLastError() != WSAEWOULDBLOCK)
 494       m_error = wxSOCKET_IOERR;
 495     else
 496       m_error = wxSOCKET_WOULDBLOCK;
 497     return -1;
 498   }
 499
 500   return ret;
 501 }
 502
 503 int wxSocketImplMSW::Write(const void *buffer, int size)
 504 {
 505   int ret;
 506
 507   if (m_fd == INVALID_SOCKET || m_server)
 508   {
 509     m_error = wxSOCKET_INVSOCK;
 510     return -1;
 511   }
 512
 513   /* Write the data */
 514   if (m_stream)
 515     ret = Send_Stream(buffer, size);
 516   else
 517     ret = Send_Dgram(buffer, size);
 518
 519   if (ret == SOCKET_ERROR)
 520   {
 521     if (WSAGetLastError() != WSAEWOULDBLOCK)
 522       m_error = wxSOCKET_IOERR;
 523     else
 524       m_error = wxSOCKET_WOULDBLOCK;
 525
 526     /* Only reenable OUTPUT events after an error (just like WSAAsyncSelect
 527      * does). Once the first OUTPUT event is received, users can assume
 528      * that the socket is writable until a read operation fails. Only then
 529      * will further OUTPUT events be posted.
 530      */
 531     m_detected &= ~wxSOCKET_OUTPUT_FLAG;
 532     return -1;
 533   }
 534
 535   return ret;
 536 }
 537
 538 /* Internals (IO) */
 539
 540 /*
 541  *  For blocking sockets, wait until the connection is
 542  *  established or fails, or until timeout ellapses.
 543  */
 544 wxSocketError wxSocketImplMSW::Connect_Timeout()
 545 {
 546   fd_set writefds;
 547   fd_set exceptfds;
 548
 549   FD_ZERO(&writefds);
 550   FD_ZERO(&exceptfds);
 551   FD_SET(m_fd, &writefds);
 552   FD_SET(m_fd, &exceptfds);
 553   if (select(0, NULL, &writefds, &exceptfds, &m_timeout) == 0)
 554   {
 555     m_error = wxSOCKET_TIMEDOUT;
 556     return wxSOCKET_TIMEDOUT;
 557   }
 558   if (!FD_ISSET(m_fd, &writefds))
 559   {
 560     m_error = wxSOCKET_IOERR;
 561     return wxSOCKET_IOERR;
 562   }
 563
 564   return wxSOCKET_NOERROR;
 565 }
 566
 567 int wxSocketImplMSW::Recv_Stream(void *buffer, int size)
 568 {
 569     return recv(m_fd, static_cast<char *>(buffer), size, 0);
 570 }
 571
 572 int wxSocketImplMSW::Recv_Dgram(void *buffer, int size)
 573 {
 574   wxSockAddr from;
 575   WX_SOCKLEN_T fromlen = sizeof(from);
 576   int ret;
 577   wxSocketError err;
 578
 579   ret = recvfrom(m_fd, static_cast<char *>(buffer),
 580                  size, 0, &from, &fromlen);
 581
 582   if (ret == SOCKET_ERROR)
 583     return SOCKET_ERROR;
 584
 585   /* Translate a system address into a wxSocketImpl address */
 586   if (!m_peer)
 587   {
 588     m_peer = GAddress_new();
 589     if (!m_peer)
 590     {
 591       m_error = wxSOCKET_MEMERR;
 592       return -1;
 593     }
 594   }
 595   err = _GAddress_translate_from(m_peer, (sockaddr*)&from, fromlen);
 596   if (err != wxSOCKET_NOERROR)
 597   {
 598     GAddress_destroy(m_peer);
 599     m_peer  = NULL;
 600     m_error = err;
 601     return -1;
 602   }
 603
 604   return ret;
 605 }
 606
 607 int wxSocketImplMSW::Send_Stream(const void *buffer, int size)
 608 {
 609   return send(m_fd, static_cast<const char *>(buffer), size, 0);
 610 }
 611
 612 int wxSocketImplMSW::Send_Dgram(const void *buffer, int size)
 613 {
 614   struct sockaddr *addr;
 615   int len, ret;
 616   wxSocketError err;
 617
 618   if (!m_peer)
 619   {
 620     m_error = wxSOCKET_INVADDR;
 621     return -1;
 622   }
 623
 624   err = _GAddress_translate_to(m_peer, &addr, &len);
 625   if (err != wxSOCKET_NOERROR)
 626   {
 627     m_error = err;
 628     return -1;
 629   }
 630
 631   ret = sendto(m_fd, static_cast<const char *>(buffer), size, 0, addr, len);
 632
 633   /* Frees memory allocated by _GAddress_translate_to */
 634   free(addr);
 635
 636   return ret;
 637 }
 638
 639 /*
 640  * -------------------------------------------------------------------------
 641  * GAddress
 642  * -------------------------------------------------------------------------
 643  */
 644
 645 /* CHECK_ADDRESS verifies that the current address family is either
 646  * wxSOCKET_NOFAMILY or wxSOCKET_*family*, and if it is wxSOCKET_NOFAMILY, it
 647  * initalizes it to be a wxSOCKET_*family*. In other cases, it returns
 648  * an appropiate error code.
 649  *
 650  * CHECK_ADDRESS_RETVAL does the same but returning 'retval' on error.
 651  */
 652 #define CHECK_ADDRESS(address, family)                              \
 653 {                                                                   \
 654   if (address->m_family == wxSOCKET_NOFAMILY)                          \
 655     if (_GAddress_Init_##family(address) != wxSOCKET_NOERROR)          \
 656       return address->m_error;                                      \
 657   if (address->m_family != wxSOCKET_##family)                          \
 658   {                                                                 \
 659     address->m_error = wxSOCKET_INVADDR;                               \
 660     return wxSOCKET_INVADDR;                                           \
 661   }                                                                 \
 662 }
 663
 664 #define CHECK_ADDRESS_RETVAL(address, family, retval)               \
 665 {                                                                   \
 666   if (address->m_family == wxSOCKET_NOFAMILY)                          \
 667     if (_GAddress_Init_##family(address) != wxSOCKET_NOERROR)          \
 668       return retval;                                                \
 669   if (address->m_family != wxSOCKET_##family)                          \
 670   {                                                                 \
 671     address->m_error = wxSOCKET_INVADDR;                               \
 672     return retval;                                                  \
 673   }                                                                 \
 674 }
 675
 676
 677 GAddress *GAddress_new()
 678 {
 679   GAddress *address;
 680
 681   if ((address = (GAddress *) malloc(sizeof(GAddress))) == NULL)
 682     return NULL;
 683
 684   address->m_family = wxSOCKET_NOFAMILY;
 685   address->m_addr   = NULL;
 686   address->m_len    = 0;
 687
 688   return address;
 689 }
 690
 691 GAddress *GAddress_copy(GAddress *address)
 692 {
 693   GAddress *addr2;
 694
 695   if ((addr2 = (GAddress *) malloc(sizeof(GAddress))) == NULL)
 696     return NULL;
 697
 698   memcpy(addr2, address, sizeof(GAddress));
 699
 700   if (address->m_addr)
 701   {
 702     addr2->m_addr = (struct sockaddr *) malloc(addr2->m_len);
 703     if (addr2->m_addr == NULL)
 704     {
 705       free(addr2);
 706       return NULL;
 707     }
 708     memcpy(addr2->m_addr, address->m_addr, addr2->m_len);
 709   }
 710
 711   return addr2;
 712 }
 713
 714 void GAddress_destroy(GAddress *address)
 715 {
 716   if (address->m_addr)
 717     free(address->m_addr);
 718
 719   free(address);
 720 }
 721
 722 void GAddress_SetFamily(GAddress *address, GAddressType type)
 723 {
 724   address->m_family = type;
 725 }
 726
 727 GAddressType GAddress_GetFamily(GAddress *address)
 728 {
 729   return address->m_family;
 730 }
 731
 732 wxSocketError _GAddress_translate_from(GAddress *address,
 733                                       struct sockaddr *addr, int len)
 734 {
 735   address->m_realfamily = addr->sa_family;
 736   switch (addr->sa_family)
 737   {
 738     case AF_INET:
 739       address->m_family = wxSOCKET_INET;
 740       break;
 741     case AF_UNIX:
 742       address->m_family = wxSOCKET_UNIX;
 743       break;
 744 #if wxUSE_IPV6
 745     case AF_INET6:
 746       address->m_family = wxSOCKET_INET6;
 747       break;
 748 #endif
 749     default:
 750     {
 751       address->m_error = wxSOCKET_INVOP;
 752       return wxSOCKET_INVOP;
 753     }
 754   }
 755
 756   if (address->m_addr)
 757     free(address->m_addr);
 758
 759   address->m_len = len;
 760   address->m_addr = (struct sockaddr *) malloc(len);
 761
 762   if (address->m_addr == NULL)
 763   {
 764     address->m_error = wxSOCKET_MEMERR;
 765     return wxSOCKET_MEMERR;
 766   }
 767   memcpy(address->m_addr, addr, len);
 768
 769   return wxSOCKET_NOERROR;
 770 }
 771
 772 wxSocketError _GAddress_translate_to(GAddress *address,
 773                                     struct sockaddr **addr, int *len)
 774 {
 775   if (!address->m_addr)
 776   {
 777     address->m_error = wxSOCKET_INVADDR;
 778     return wxSOCKET_INVADDR;
 779   }
 780
 781   *len = address->m_len;
 782   *addr = (struct sockaddr *) malloc(address->m_len);
 783   if (*addr == NULL)
 784   {
 785     address->m_error = wxSOCKET_MEMERR;
 786     return wxSOCKET_MEMERR;
 787   }
 788
 789   memcpy(*addr, address->m_addr, address->m_len);
 790   return wxSOCKET_NOERROR;
 791 }
 792
 793 /*
 794  * -------------------------------------------------------------------------
 795  * Internet address family
 796  * -------------------------------------------------------------------------
 797  */
 798
 799 wxSocketError _GAddress_Init_INET(GAddress *address)
 800 {
 801   address->m_len  = sizeof(struct sockaddr_in);
 802   address->m_addr = (struct sockaddr *) malloc(address->m_len);
 803   if (address->m_addr == NULL)
 804   {
 805     address->m_error = wxSOCKET_MEMERR;
 806     return wxSOCKET_MEMERR;
 807   }
 808
 809   address->m_family = wxSOCKET_INET;
 810   address->m_realfamily = AF_INET;
 811   ((struct sockaddr_in *)address->m_addr)->sin_family = AF_INET;
 812   ((struct sockaddr_in *)address->m_addr)->sin_addr.s_addr = INADDR_ANY;
 813
 814   return wxSOCKET_NOERROR;
 815 }
 816
 817 wxSocketError GAddress_INET_SetHostName(GAddress *address, const char *hostname)
 818 {
 819   struct hostent *he;
 820   struct in_addr *addr;
 821
 822   CHECK_ADDRESS(address, INET);
 823
 824   addr = &(((struct sockaddr_in *)address->m_addr)->sin_addr);
 825
 826   addr->s_addr = inet_addr(hostname);
 827
 828   /* If it is a numeric host name, convert it now */
 829   if (addr->s_addr == INADDR_NONE)
 830   {
 831     struct in_addr *array_addr;
 832
 833     /* It is a real name, we solve it */
 834     if ((he = gethostbyname(hostname)) == NULL)
 835     {
 836       /* addr->s_addr = INADDR_NONE just done by inet_addr() above */
 837       address->m_error = wxSOCKET_NOHOST;
 838       return wxSOCKET_NOHOST;
 839     }
 840     array_addr = (struct in_addr *) *(he->h_addr_list);
 841     addr->s_addr = array_addr[0].s_addr;
 842   }
 843   return wxSOCKET_NOERROR;
 844 }
 845
 846 wxSocketError GAddress_INET_SetBroadcastAddress(GAddress *address)
 847 {
 848   return GAddress_INET_SetHostAddress(address, INADDR_BROADCAST);
 849 }
 850
 851 wxSocketError GAddress_INET_SetAnyAddress(GAddress *address)
 852 {
 853   return GAddress_INET_SetHostAddress(address, INADDR_ANY);
 854 }
 855
 856 wxSocketError GAddress_INET_SetHostAddress(GAddress *address,
 857                                           unsigned long hostaddr)
 858 {
 859   struct in_addr *addr;
 860
 861   CHECK_ADDRESS(address, INET);
 862
 863   addr = &(((struct sockaddr_in *)address->m_addr)->sin_addr);
 864   addr->s_addr = htonl(hostaddr);
 865
 866   return wxSOCKET_NOERROR;
 867 }
 868
 869 wxSocketError GAddress_INET_SetPortName(GAddress *address, const char *port,
 870                                        const char *protocol)
 871 {
 872   struct servent *se;
 873   struct sockaddr_in *addr;
 874
 875   CHECK_ADDRESS(address, INET);
 876
 877   if (!port)
 878   {
 879     address->m_error = wxSOCKET_INVPORT;
 880     return wxSOCKET_INVPORT;
 881   }
 882
 883   se = getservbyname(port, protocol);
 884   if (!se)
 885   {
 886     if (isdigit(port[0]))
 887     {
 888       int port_int;
 889
 890       port_int = atoi(port);
 891       addr = (struct sockaddr_in *)address->m_addr;
 892       addr->sin_port = htons((u_short) port_int);
 893       return wxSOCKET_NOERROR;
 894     }
 895
 896     address->m_error = wxSOCKET_INVPORT;
 897     return wxSOCKET_INVPORT;
 898   }
 899
 900   addr = (struct sockaddr_in *)address->m_addr;
 901   addr->sin_port = se->s_port;
 902
 903   return wxSOCKET_NOERROR;
 904 }
 905
 906 wxSocketError GAddress_INET_SetPort(GAddress *address, unsigned short port)
 907 {
 908   struct sockaddr_in *addr;
 909
 910   CHECK_ADDRESS(address, INET);
 911
 912   addr = (struct sockaddr_in *)address->m_addr;
 913   addr->sin_port = htons(port);
 914
 915   return wxSOCKET_NOERROR;
 916 }
 917
 918 wxSocketError GAddress_INET_GetHostName(GAddress *address, char *hostname, size_t sbuf)
 919 {
 920   struct hostent *he;
 921   char *addr_buf;
 922   struct sockaddr_in *addr;
 923
 924   CHECK_ADDRESS(address, INET);
 925
 926   addr = (struct sockaddr_in *)address->m_addr;
 927   addr_buf = (char *)&(addr->sin_addr);
 928
 929   he = gethostbyaddr(addr_buf, sizeof(addr->sin_addr), AF_INET);
 930   if (he == NULL)
 931   {
 932     address->m_error = wxSOCKET_NOHOST;
 933     return wxSOCKET_NOHOST;
 934   }
 935
 936   strncpy(hostname, he->h_name, sbuf);
 937
 938   return wxSOCKET_NOERROR;
 939 }
 940
 941 unsigned long GAddress_INET_GetHostAddress(GAddress *address)
 942 {
 943   struct sockaddr_in *addr;
 944
 945   CHECK_ADDRESS_RETVAL(address, INET, 0);
 946
 947   addr = (struct sockaddr_in *)address->m_addr;
 948
 949   return ntohl(addr->sin_addr.s_addr);
 950 }
 951
 952 unsigned short GAddress_INET_GetPort(GAddress *address)
 953 {
 954   struct sockaddr_in *addr;
 955
 956   CHECK_ADDRESS_RETVAL(address, INET, 0);
 957
 958   addr = (struct sockaddr_in *)address->m_addr;
 959   return ntohs(addr->sin_port);
 960 }
 961
 962
 963 #if wxUSE_IPV6
 964 /*
 965  * -------------------------------------------------------------------------
 966  * Internet IPv6 address family
 967  * -------------------------------------------------------------------------
 968  */
 969 #include "ws2tcpip.h"
 970
 971 #ifdef __VISUALC__
 972     #pragma comment(lib,"ws2_32")
 973 #endif // __VISUALC__
 974
 975 wxSocketError _GAddress_Init_INET6(GAddress *address)
 976 {
 977   struct in6_addr any_address = IN6ADDR_ANY_INIT;
 978   address->m_len  = sizeof(struct sockaddr_in6);
 979   address->m_addr = (struct sockaddr *) malloc(address->m_len);
 980   if (address->m_addr == NULL)
 981   {
 982     address->m_error = wxSOCKET_MEMERR;
 983     return wxSOCKET_MEMERR;
 984   }
 985   memset(address->m_addr,0,address->m_len);
 986
 987   address->m_family = wxSOCKET_INET6;
 988   address->m_realfamily = AF_INET6;
 989   ((struct sockaddr_in6 *)address->m_addr)->sin6_family = AF_INET6;
 990   ((struct sockaddr_in6 *)address->m_addr)->sin6_addr = any_address;
 991
 992   return wxSOCKET_NOERROR;
 993 }
 994
 995 wxSocketError GAddress_INET6_SetHostName(GAddress *address, const char *hostname)
 996 {
 997   CHECK_ADDRESS(address, INET6);
 998
 999   addrinfo hints;
1000   memset( & hints, 0, sizeof( hints ) );
1001   hints.ai_family = AF_INET6;
1002   addrinfo * info = 0;
1003   if ( getaddrinfo( hostname, "0", & hints, & info ) || ! info )
1004   {
1005     address->m_error = wxSOCKET_NOHOST;
1006     return wxSOCKET_NOHOST;
1007   }
1008
1009   memcpy( address->m_addr, info->ai_addr, info->ai_addrlen );
1010   freeaddrinfo( info );
1011   return wxSOCKET_NOERROR;
1012 }
1013
1014 wxSocketError GAddress_INET6_SetAnyAddress(GAddress *address)
1015 {
1016   CHECK_ADDRESS(address, INET6);
1017
1018   struct in6_addr addr;
1019   memset( & addr, 0, sizeof( addr ) );
1020   return GAddress_INET6_SetHostAddress(address, addr);
1021 }
1022 wxSocketError GAddress_INET6_SetHostAddress(GAddress *address,
1023                                           struct in6_addr hostaddr)
1024 {
1025   CHECK_ADDRESS(address, INET6);
1026
1027   ((struct sockaddr_in6 *)address->m_addr)->sin6_addr = hostaddr;
1028
1029   return wxSOCKET_NOERROR;
1030 }
1031
1032 wxSocketError GAddress_INET6_SetPortName(GAddress *address, const char *port,
1033                                        const char *protocol)
1034 {
1035   struct servent *se;
1036   struct sockaddr_in6 *addr;
1037
1038   CHECK_ADDRESS(address, INET6);
1039
1040   if (!port)
1041   {
1042     address->m_error = wxSOCKET_INVPORT;
1043     return wxSOCKET_INVPORT;
1044   }
1045
1046   se = getservbyname(port, protocol);
1047   if (!se)
1048   {
1049     if (isdigit((unsigned char) port[0]))
1050     {
1051       int port_int;
1052
1053       port_int = atoi(port);
1054       addr = (struct sockaddr_in6 *)address->m_addr;
1055       addr->sin6_port = htons((u_short) port_int);
1056       return wxSOCKET_NOERROR;
1057     }
1058
1059     address->m_error = wxSOCKET_INVPORT;
1060     return wxSOCKET_INVPORT;
1061   }
1062
1063   addr = (struct sockaddr_in6 *)address->m_addr;
1064   addr->sin6_port = se->s_port;
1065
1066   return wxSOCKET_NOERROR;
1067 }
1068
1069 wxSocketError GAddress_INET6_SetPort(GAddress *address, unsigned short port)
1070 {
1071   struct sockaddr_in6 *addr;
1072
1073   CHECK_ADDRESS(address, INET6);
1074
1075   addr = (struct sockaddr_in6 *)address->m_addr;
1076   addr->sin6_port = htons(port);
1077
1078   return wxSOCKET_NOERROR;
1079 }
1080
1081 wxSocketError GAddress_INET6_GetHostName(GAddress *address, char *hostname, size_t sbuf)
1082 {
1083   struct hostent *he;
1084   char *addr_buf;
1085   struct sockaddr_in6 *addr;
1086
1087   CHECK_ADDRESS(address, INET6);
1088
1089   addr = (struct sockaddr_in6 *)address->m_addr;
1090   addr_buf = (char *)&(addr->sin6_addr);
1091
1092   he = gethostbyaddr(addr_buf, sizeof(addr->sin6_addr), AF_INET6);
1093   if (he == NULL)
1094   {
1095     address->m_error = wxSOCKET_NOHOST;
1096     return wxSOCKET_NOHOST;
1097   }
1098
1099   strncpy(hostname, he->h_name, sbuf);
1100
1101   return wxSOCKET_NOERROR;
1102 }
1103
1104 wxSocketError GAddress_INET6_GetHostAddress(GAddress *address,struct in6_addr *hostaddr)
1105 {
1106   CHECK_ADDRESS_RETVAL(address, INET6, wxSOCKET_INVADDR);
1107   *hostaddr = ( (struct sockaddr_in6 *)address->m_addr )->sin6_addr;
1108   return wxSOCKET_NOERROR;
1109 }
1110
1111 unsigned short GAddress_INET6_GetPort(GAddress *address)
1112 {
1113   CHECK_ADDRESS_RETVAL(address, INET6, 0);
1114
1115   return ntohs( ((struct sockaddr_in6 *)address->m_addr)->sin6_port );
1116 }
1117
1118 #endif // wxUSE_IPV6
1119
1120 /*
1121  * -------------------------------------------------------------------------
1122  * Unix address family
1123  * -------------------------------------------------------------------------
1124  */
1125
1126 wxSocketError _GAddress_Init_UNIX(GAddress *address)
1127 {
1128   address->m_error = wxSOCKET_INVADDR;
1129   return wxSOCKET_INVADDR;
1130 }
1131
1132 wxSocketError GAddress_UNIX_SetPath(GAddress *address, const char *WXUNUSED(path))
1133 {
1134   address->m_error = wxSOCKET_INVADDR;
1135   return wxSOCKET_INVADDR;
1136 }
1137
1138 wxSocketError GAddress_UNIX_GetPath(GAddress *address, char *WXUNUSED(path), size_t WXUNUSED(sbuf))
1139 {
1140   address->m_error = wxSOCKET_INVADDR;
1141   return wxSOCKET_INVADDR;
1142 }
1143
1144 #endif  // wxUSE_SOCKETS