Some doc corrections

[wxWidgets.git] / src / msw / gsocket.c

diff --git a/src/msw/gsocket.c b/src/msw/gsocket.c
index 0a0f072e7c259fe107b7e11a87519f0f2e1f4d59..60d2c3f417c1d9ba254fac62c7588a3243a20046 100644 (file)
--- a/src/msw/gsocket.c
+++ b/src/msw/gsocket.c
@@ -1,38 +1,54 @@
 /* -------------------------------------------------------------------------
 /* -------------------------------------------------------------------------

- * Project: GSocket (Generic Socket) for WX
+ * Project: GSocket (Generic Socket)

  * Name:    gsocket.c
  * Name:    gsocket.c

+ * Author:  Guillermo Rodriguez Garcia <guille@iies.es>

  * Purpose: GSocket main MSW file
  * CVSID:   $Id$
  * -------------------------------------------------------------------------
  */
 
  * Purpose: GSocket main MSW file
  * CVSID:   $Id$
  * -------------------------------------------------------------------------
  */
 

-#ifndef __GSOCKET_STANDALONE__
-#include "wx/setup.h"
-#endif
+/*
+ * PLEASE don't put C++ comments here - this is a C source file.
+ */

 
 

-#if wxUSE_SOCKETS || defined(__GSOCKET_STANDALONE__)
+#ifdef _MSC_VER
+   /* RPCNOTIFICATION_ROUTINE in rasasync.h (included from winsock.h),
+    * warning: conditional expression is constant.
+    */
+#  pragma warning(disable:4115)
+   /* FD_SET,
+    * warning: named type definition in parentheses.
+    */
+#  pragma warning(disable:4127)
+   /* GAddress_UNIX_GetPath,
+    * warning: unreferenced formal parameter.
+    */
+#  pragma warning(disable:4100)
+#endif /* _MSC_VER */

 
 
 #ifndef __GSOCKET_STANDALONE__
 
 
 #ifndef __GSOCKET_STANDALONE__

+#  include "wx/setup.h"
+#endif

 
 

-#include "wx/msw/gsockmsw.h"
-#include "wx/gsocket.h"
-
-#define INSTANCE wxGetInstance()
+#if wxUSE_SOCKETS || defined(__GSOCKET_STANDALONE__)

 
 

+#ifndef __GSOCKET_STANDALONE__
+#  include "wx/msw/gsockmsw.h"
+#  include "wx/gsocket.h"

 #else
 #else

-
-#include "gsockmsw.h"
-#include "gsocket.h"
-
-/* If not using wxWindows, a global var called hInst must
- * be available and it must containt the app's instance
- * handle.
- */
-#define INSTANCE hInst
-
+#  include "gsockmsw.h"
+#  include "gsocket.h"

 #endif /* __GSOCKET_STANDALONE__ */
 
 #endif /* __GSOCKET_STANDALONE__ */
 

+/* Redefine some GUI-only functions to do nothing in console mode */
+#if defined(wxUSE_GUI) && !wxUSE_GUI
+#  define _GSocket_GUI_Init(socket) (1)
+#  define _GSocket_GUI_Destroy(socket)
+#  define _GSocket_Enable_Events(socket)
+#  define _GSocket_Disable_Events(socket)
+#endif /* wxUSE_GUI */
+

 
 #include <assert.h>
 #include <string.h>
 
 #include <assert.h>
 #include <string.h>


@@ -40,90 +56,21 @@
 #include <stdlib.h>
 #include <stddef.h>
 #include <ctype.h>
 #include <stdlib.h>
 #include <stddef.h>
 #include <ctype.h>

-#include <winsock.h>

 
 

-#define SOCKLEN_T  int
-#define CLASSNAME  "_GSocket_Internal_Window_Class"
-#define WINDOWNAME "_GSocket_Internal_Window_Name"
+#include <winsock.h>

 
 

-/* Maximum number of different GSocket objects at a given time.
- * This value can be modified at will, but it CANNOT be greater
- * than (0x7FFF - WM_USER + 1)
- */
-#define MAXSOCKETS 1024

 
 

-#if (MAXSOCKETS > (0x7FFF - WM_USER + 1))
-#error "MAXSOCKETS is too big!"
+/* if we use configure for MSW SOCKLEN_T will be already defined */
+#ifndef SOCKLEN_T
+#  define SOCKLEN_T int

 #endif
 
 
 #endif
 
 

-/* Global variables */
-
-extern HINSTANCE INSTANCE;
-static HWND hWin;
-static CRITICAL_SECTION critical;
-static GSocket* socketList[MAXSOCKETS];
-static int firstAvailable;
+/* Constructors / Destructors for GSocket */

 
 

-/* Global initializers */
-
-bool GSocket_Init()
-{
-  WSADATA wsaData;
-  WNDCLASS winClass;
-  int i;
-
-  /* Create internal window for event notifications */
-  winClass.style         = 0;
-  winClass.lpfnWndProc   = _GSocket_Internal_WinProc;
-  winClass.cbClsExtra    = 0;
-  winClass.cbWndExtra    = 0;
-  winClass.hInstance     = INSTANCE;
-  winClass.hIcon         = (HICON) NULL;
-  winClass.hCursor       = (HCURSOR) NULL;
-  winClass.hbrBackground = (HBRUSH) NULL;
-  winClass.lpszMenuName  = (LPCTSTR) NULL;
-  winClass.lpszClassName = CLASSNAME;
-
-  RegisterClass(&winClass);
-  hWin = CreateWindow(CLASSNAME,
-                      WINDOWNAME,
-                      0, 0, 0, 0, 0,
-                      (HWND) NULL, (HMENU) NULL, INSTANCE, (LPVOID) NULL);
-
-  if (!hWin) return FALSE;
-
-  /* Initialize socket list */
-  InitializeCriticalSection(&critical);
-
-  for (i = 0; i < MAXSOCKETS; i++)
-  {
-    socketList[i] = NULL;
-  }
-  firstAvailable = 0;
-
-  /* Initialize WinSocket */
-  return (WSAStartup((1 << 8) | 1, &wsaData) == 0);
-}
-
-void GSocket_Cleanup()
-{
-  /* Destroy internal window */
-  DestroyWindow(hWin);
-  UnregisterClass(CLASSNAME, INSTANCE);
-
-  /* Delete critical section */
-  DeleteCriticalSection(&critical);
-
-  /* Cleanup WinSocket */
-  WSACleanup();
-}
-
-/* Constructors / Destructors */
-
-GSocket *GSocket_new()
+GSocket *GSocket_new(void)

 {
 {

-  int i;
+  int i, success;

   GSocket *socket;
 
   if ((socket = (GSocket *) malloc(sizeof(GSocket))) == NULL)
   GSocket *socket;
 
   if ((socket = (GSocket *) malloc(sizeof(GSocket))) == NULL)


@@ -134,36 +81,24 @@ GSocket *GSocket_new()
   {
     socket->m_cbacks[i]     = NULL;
   }
   {
     socket->m_cbacks[i]     = NULL;
   }

-  socket->m_local           = NULL;
-  socket->m_peer            = NULL;
+  socket->m_detected        = 0;
+  socket->m_local           = NULL;     
+  socket->m_peer            = NULL;     

   socket->m_error           = GSOCK_NOERROR;
   socket->m_error           = GSOCK_NOERROR;

-  socket->m_server          = FALSE;
+  socket->m_server          = FALSE;            

   socket->m_stream          = TRUE;
   socket->m_non_blocking    = FALSE;
   socket->m_timeout.tv_sec  = 10 * 60;  /* 10 minutes */
   socket->m_timeout.tv_usec = 0;
   socket->m_stream          = TRUE;
   socket->m_non_blocking    = FALSE;
   socket->m_timeout.tv_sec  = 10 * 60;  /* 10 minutes */
   socket->m_timeout.tv_usec = 0;

-  socket->m_detected        = 0;
-
-  /* Allocate a new message number for this socket */
-  EnterCriticalSection(&critical);
+  socket->m_establishing    = FALSE;

 
 

-  i = firstAvailable;
-  while (socketList[i] != NULL)
+  /* Per-socket GUI-specific initialization */
+  success = _GSocket_GUI_Init(socket);
+  if (!success)

   {
   {

-    i = (i + 1) % MAXSOCKETS;
-
-    if (i == firstAvailable)    /* abort! */
-    {
-      free(socket);
-      LeaveCriticalSection(&critical);
-      return NULL;
-    }
+    free(socket);
+    socket = NULL;

   }
   }

-  socketList[i] = socket;
-  firstAvailable = (i + 1) % MAXSOCKETS;
-  socket->m_msgnumber = (i + WM_USER);
-
-  LeaveCriticalSection(&critical);

 
   return socket;
 }
 
   return socket;
 }


@@ -172,10 +107,8 @@ void GSocket_destroy(GSocket *socket)
 {
   assert(socket != NULL);
 
 {
   assert(socket != NULL);
 

-  /* Remove the socket from the list */
-  EnterCriticalSection(&critical);
-  socketList[(socket->m_msgnumber - WM_USER)] = NULL;
-  LeaveCriticalSection(&critical);
+  /* Per-socket GUI-specific cleanup */
+  _GSocket_GUI_Destroy(socket);

 
   /* Check that the socket is really shutdowned */
   if (socket->m_fd != INVALID_SOCKET)
 
   /* Check that the socket is really shutdowned */
   if (socket->m_fd != INVALID_SOCKET)


@@ -188,10 +121,14 @@ void GSocket_destroy(GSocket *socket)
   if (socket->m_peer)
     GAddress_destroy(socket->m_peer);
 
   if (socket->m_peer)
     GAddress_destroy(socket->m_peer);
 

-  /* Destroy socket itself */
+  /* Destroy the socket itself */

   free(socket);
 }
 
   free(socket);
 }
 

+/* GSocket_Shutdown:
+ *  Disallow further read/write operations on this socket, close
+ *  the fd and disable all callbacks.
+ */

 void GSocket_Shutdown(GSocket *socket)
 {
   int evt;
 void GSocket_Shutdown(GSocket *socket)
 {
   int evt;


@@ -210,22 +147,38 @@ void GSocket_Shutdown(GSocket *socket)
   for (evt = 0; evt < GSOCK_MAX_EVENT; evt++)
     socket->m_cbacks[evt] = NULL;
 
   for (evt = 0; evt < GSOCK_MAX_EVENT; evt++)
     socket->m_cbacks[evt] = NULL;
 

-  socket->m_detected = 0;
+  socket->m_detected = GSOCK_LOST_FLAG;

   _GSocket_Disable_Events(socket);
 }
 
 /* Address handling */
 
   _GSocket_Disable_Events(socket);
 }
 
 /* Address handling */
 

+/* GSocket_SetLocal:
+ * GSocket_GetLocal:
+ * GSocket_SetPeer:
+ * GSocket_GetPeer:
+ *  Set or get the local or peer address for this socket. The 'set'
+ *  functions return GSOCK_NOERROR on success, an error code otherwise.
+ *  The 'get' functions return a pointer to a GAddress object on success,
+ *  or NULL otherwise, in which case they set the error code of the
+ *  corresponding GSocket.
+ *
+ *  Error codes:
+ *    GSOCK_INVSOCK - the socket is not valid.
+ *    GSOCK_INVADDR - the address is not valid.
+ */

 GSocketError GSocket_SetLocal(GSocket *socket, GAddress *address)
 {
   assert(socket != NULL);
 
 GSocketError GSocket_SetLocal(GSocket *socket, GAddress *address)
 {
   assert(socket != NULL);
 

+  /* the socket must be initialized, or it must be a server */

   if (socket->m_fd != INVALID_SOCKET && !socket->m_server)
   {
     socket->m_error = GSOCK_INVSOCK;
     return GSOCK_INVSOCK;
   }
 
   if (socket->m_fd != INVALID_SOCKET && !socket->m_server)
   {
     socket->m_error = GSOCK_INVSOCK;
     return GSOCK_INVSOCK;
   }
 

+  /* check address */

   if (address == NULL || address->m_family == GSOCK_NOFAMILY)
   {
     socket->m_error = GSOCK_INVADDR;
   if (address == NULL || address->m_family == GSOCK_NOFAMILY)
   {
     socket->m_error = GSOCK_INVADDR;


@@ -244,6 +197,7 @@ GSocketError GSocket_SetPeer(GSocket *socket, GAddress *address)
 {
   assert(socket != NULL);
 
 {
   assert(socket != NULL);
 

+  /* check address */

   if (address == NULL || address->m_family == GSOCK_NOFAMILY)
   {
     socket->m_error = GSOCK_INVADDR;
   if (address == NULL || address->m_family == GSOCK_NOFAMILY)
   {
     socket->m_error = GSOCK_INVADDR;


@@ -262,37 +216,39 @@ GAddress *GSocket_GetLocal(GSocket *socket)
 {
   GAddress *address;
   struct sockaddr addr;
 {
   GAddress *address;
   struct sockaddr addr;

-  SOCKLEN_T size;
+  SOCKLEN_T size = sizeof(addr);
+  GSocketError err;

 
   assert(socket != NULL);
 
 
   assert(socket != NULL);
 

+  /* try to get it from the m_local var first */

   if (socket->m_local)
     return GAddress_copy(socket->m_local);
 
   if (socket->m_local)
     return GAddress_copy(socket->m_local);
 

+  /* else, if the socket is initialized, try getsockname */

   if (socket->m_fd == INVALID_SOCKET)
   {
     socket->m_error = GSOCK_INVSOCK;
     return NULL;
   }
 
   if (socket->m_fd == INVALID_SOCKET)
   {
     socket->m_error = GSOCK_INVSOCK;
     return NULL;
   }
 

-  size = sizeof(addr);
-

   if (getsockname(socket->m_fd, &addr, &size) == SOCKET_ERROR)
   {
     socket->m_error = GSOCK_IOERR;
     return NULL;
   }
 
   if (getsockname(socket->m_fd, &addr, &size) == SOCKET_ERROR)
   {
     socket->m_error = GSOCK_IOERR;
     return NULL;
   }
 

-  address = GAddress_new();
-  if (address == NULL)
+  /* got a valid address from getsockname, create a GAddress object */
+  if ((address = GAddress_new()) == NULL)

   {
      socket->m_error = GSOCK_MEMERR;
      return NULL;
   }
   {
      socket->m_error = GSOCK_MEMERR;
      return NULL;
   }

-  if (_GAddress_translate_from(address, &addr, size) != GSOCK_NOERROR)
+
+  if ((err = _GAddress_translate_from(address, &addr, size)) != GSOCK_NOERROR)

   {
   {

-     socket->m_error = GSOCK_MEMERR;

      GAddress_destroy(address);
      GAddress_destroy(address);

+     socket->m_error = err;

      return NULL;
   }
 
      return NULL;
   }
 


@@ -303,6 +259,7 @@ GAddress *GSocket_GetPeer(GSocket *socket)
 {
   assert(socket != NULL);
 
 {
   assert(socket != NULL);
 

+  /* try to get it from the m_peer var */

   if (socket->m_peer)
     return GAddress_copy(socket->m_peer);
 
   if (socket->m_peer)
     return GAddress_copy(socket->m_peer);
 


@@ -312,11 +269,14 @@ GAddress *GSocket_GetPeer(GSocket *socket)
 /* Server specific parts */
 
 /* GSocket_SetServer:
 /* Server specific parts */
 
 /* GSocket_SetServer:

- *  Sets up the socket as a server. It uses the "Local" field of GSocket.
- *  "Local" must be set by GSocket_SetLocal() before GSocket_SetServer()
- *  is called. Possible error codes are: GSOCK_INVSOCK if socket has not
- *  been initialized, GSOCK_INVADDR if the local address has not been
- *  defined and GSOCK_IOERR for other internal errors.
+ *  Sets up this socket as a server. The local address must have been
+ *  set with GSocket_SetLocal() before GSocket_SetServer() is called.
+ *  Returns GSOCK_NOERROR on success, one of the following otherwise:
+ * 
+ *  Error codes:
+ *    GSOCK_INVSOCK - the socket is in use.
+ *    GSOCK_INVADDR - the local address has not been set.
+ *    GSOCK_IOERR   - low-level error. 

  */
 GSocketError GSocket_SetServer(GSocket *sck)
 {
  */
 GSocketError GSocket_SetServer(GSocket *sck)
 {


@@ -324,12 +284,14 @@ GSocketError GSocket_SetServer(GSocket *sck)
 
   assert(sck != NULL);
 
 
   assert(sck != NULL);
 

+  /* must not be in use */

   if (sck->m_fd != INVALID_SOCKET)
   {
     sck->m_error = GSOCK_INVSOCK;
     return GSOCK_INVSOCK;
   }
 
   if (sck->m_fd != INVALID_SOCKET)
   {
     sck->m_error = GSOCK_INVSOCK;
     return GSOCK_INVSOCK;
   }
 

+  /* the local addr must have been set */

   if (!sck->m_local)
   {
     sck->m_error = GSOCK_INVADDR;
   if (!sck->m_local)
   {
     sck->m_error = GSOCK_INVADDR;


@@ -353,17 +315,15 @@ GSocketError GSocket_SetServer(GSocket *sck)
   ioctlsocket(sck->m_fd, FIONBIO, (u_long FAR *) &arg);
   _GSocket_Enable_Events(sck);
 
   ioctlsocket(sck->m_fd, FIONBIO, (u_long FAR *) &arg);
   _GSocket_Enable_Events(sck);
 

-  /* Bind the socket to the LOCAL address */
-  if (bind(sck->m_fd, sck->m_local->m_addr, sck->m_local->m_len) != 0)
-  {
-    closesocket(sck->m_fd);
-    sck->m_fd = INVALID_SOCKET;
-    sck->m_error = GSOCK_IOERR;
-    return GSOCK_IOERR;
-  }
-
-  /* Enable listening up to 5 connections */
-  if (listen(sck->m_fd, 5) != 0)
+  /* Bind to the local address,
+   * retrieve the actual address bound,
+   * and listen up to 5 connections.
+   */
+  if ((bind(sck->m_fd, sck->m_local->m_addr, sck->m_local->m_len) != 0) ||
+      (getsockname(sck->m_fd,
+                   sck->m_local->m_addr,
+                   (SOCKLEN_T *)&sck->m_local->m_len) != 0) ||
+      (listen(sck->m_fd, 5) != 0))

   {
     closesocket(sck->m_fd);
     sck->m_fd = INVALID_SOCKET;
   {
     closesocket(sck->m_fd);
     sck->m_fd = INVALID_SOCKET;


@@ -375,17 +335,31 @@ GSocketError GSocket_SetServer(GSocket *sck)
 }
 
 /* GSocket_WaitConnection:
 }
 
 /* GSocket_WaitConnection:

- *  Waits for an incoming client connection.
+ *  Waits for an incoming client connection. Returns a pointer to
+ *  a GSocket object, or NULL if there was an error, in which case
+ *  the last error field will be updated for the calling GSocket.
+ *
+ *  Error codes (set in the calling GSocket)
+ *    GSOCK_INVSOCK    - the socket is not valid or not a server.
+ *    GSOCK_TIMEDOUT   - timeout, no incoming connections.
+ *    GSOCK_WOULDBLOCK - the call would block and the socket is nonblocking.
+ *    GSOCK_MEMERR     - couldn't allocate memory.
+ *    GSOCK_IOERR      - low-level error. 

  */
 GSocket *GSocket_WaitConnection(GSocket *sck)
 {
   GSocket *connection;
  */
 GSocket *GSocket_WaitConnection(GSocket *sck)
 {
   GSocket *connection;

+  struct sockaddr from;
+  SOCKLEN_T fromlen = sizeof(from);
+  GSocketError err;

   u_long arg = 1;
 
   assert(sck != NULL);
 
   u_long arg = 1;
 
   assert(sck != NULL);
 

+  /* Reenable CONNECTION events */

   sck->m_detected &= ~GSOCK_CONNECTION_FLAG;
 
   sck->m_detected &= ~GSOCK_CONNECTION_FLAG;
 

+  /* If the socket has already been created, we exit immediately */

   if (sck->m_fd == INVALID_SOCKET || !sck->m_server)
   {
     sck->m_error = GSOCK_INVSOCK;
   if (sck->m_fd == INVALID_SOCKET || !sck->m_server)
   {
     sck->m_error = GSOCK_INVSOCK;


@@ -409,7 +383,7 @@ GSocket *GSocket_WaitConnection(GSocket *sck)
     return NULL;
   }
 
     return NULL;
   }
 

-  connection->m_fd = accept(sck->m_fd, NULL, NULL);
+  connection->m_fd = accept(sck->m_fd, &from, &fromlen);

 
   if (connection->m_fd == INVALID_SOCKET)
   {
 
   if (connection->m_fd == INVALID_SOCKET)
   {


@@ -427,94 +401,62 @@ GSocket *GSocket_WaitConnection(GSocket *sck)
   connection->m_stream   = TRUE;
   connection->m_oriented = TRUE;
 
   connection->m_stream   = TRUE;
   connection->m_oriented = TRUE;
 

-  ioctlsocket(connection->m_fd, FIONBIO, (u_long FAR *) &arg);
-  _GSocket_Enable_Events(connection);
-
-  return connection;
-}
-
-/* Non oriented connections */
-
-GSocketError GSocket_SetNonOriented(GSocket *sck)
-{
-  u_long arg = 1;
-
-  assert(sck != NULL);
-
-  if (sck->m_fd != INVALID_SOCKET)
+  /* Setup the peer address field */
+  connection->m_peer = GAddress_new();
+  if (!connection->m_peer)

   {
   {

-    sck->m_error = GSOCK_INVSOCK;
-    return GSOCK_INVSOCK;
-  }
-
-  if (!sck->m_local)
-  {
-    sck->m_error = GSOCK_INVADDR;
-    return GSOCK_INVADDR;
-  }
-
-  /* Initialize all fields */
-  sck->m_stream   = FALSE;
-  sck->m_server   = FALSE;
-  sck->m_oriented = FALSE;
-
-  /* Create the socket */
-  sck->m_fd = socket(sck->m_local->m_realfamily, SOCK_DGRAM, 0);
-
-  if (sck->m_fd == INVALID_SOCKET)
-  {
-    sck->m_error = GSOCK_IOERR;
-    return GSOCK_IOERR;
+    GSocket_destroy(connection);
+    sck->m_error = GSOCK_MEMERR;
+    return NULL;

   }
   }

-
-  ioctlsocket(sck->m_fd, FIONBIO, (u_long FAR *) &arg);
-  _GSocket_Enable_Events(sck);
-
-  /* Bind it to the LOCAL address */
-  if (bind(sck->m_fd, sck->m_local->m_addr, sck->m_local->m_len) != 0)
+  err = _GAddress_translate_from(connection->m_peer, &from, fromlen);
+  if (err != GSOCK_NOERROR)

   {
   {

-    closesocket(sck->m_fd);
-    sck->m_fd    = INVALID_SOCKET;
-    sck->m_error = GSOCK_IOERR;
-    return GSOCK_IOERR;
+    GAddress_destroy(connection->m_peer);
+    GSocket_destroy(connection);
+    sck->m_error = err;
+    return NULL;

   }
 
   }
 

-  return GSOCK_NOERROR;
-}
-
-GSocketError GSocket_SetBroadcast(GSocket *sck)
-{
-  BOOL b = TRUE;
-
-  assert(sck != NULL);
-
-  if (GSocket_SetNonOriented(sck) != GSOCK_NOERROR)
-    return sck->m_error;
-
-  setsockopt(sck->m_fd, SOL_SOCKET, SO_BROADCAST,
-             (const char FAR *) &b, sizeof(b));
+  ioctlsocket(connection->m_fd, FIONBIO, (u_long FAR *) &arg);
+  _GSocket_Enable_Events(connection);

 
 

-  return GSOCK_NOERROR;
+  return connection;

 }
 
 /* Client specific parts */
 
 /* GSocket_Connect:
 }
 
 /* Client specific parts */
 
 /* GSocket_Connect:

- *  Establishes a client connection to a server using the "Peer"
- *  field of GSocket. "Peer" must be set by GSocket_SetPeer() before
- *  GSocket_Connect() is called. Possible error codes are GSOCK_INVSOCK,
- *  GSOCK_INVADDR, GSOCK_TIMEDOUT, GSOCK_WOULDBLOCK and GSOCK_IOERR.
- *  If a socket is nonblocking and Connect() returns GSOCK_WOULDBLOCK,
- *  the connection request can be completed later. Use GSocket_Select()
- *  to check or wait for a GSOCK_CONNECTION event.
+ *  For stream (connection oriented) sockets, GSocket_Connect() tries
+ *  to establish a client connection to a server using the peer address
+ *  as established with GSocket_SetPeer(). Returns GSOCK_NOERROR if the
+ *  connection has been succesfully established, or one of the error
+ *  codes listed below. Note that for nonblocking sockets, a return
+ *  value of GSOCK_WOULDBLOCK doesn't mean a failure. The connection
+ *  request can be completed later; you should use GSocket_Select()
+ *  to poll for GSOCK_CONNECTION | GSOCK_LOST, or wait for the
+ *  corresponding asynchronous events.
+ *
+ *  For datagram (non connection oriented) sockets, GSocket_Connect()
+ *  just sets the peer address established with GSocket_SetPeer() as
+ *  default destination.
+ *
+ *  Error codes:
+ *    GSOCK_INVSOCK    - the socket is in use or not valid.
+ *    GSOCK_INVADDR    - the peer address has not been established.
+ *    GSOCK_TIMEDOUT   - timeout, the connection failed.
+ *    GSOCK_WOULDBLOCK - connection in progress (nonblocking sockets only)
+ *    GSOCK_MEMERR     - couldn't allocate memory.
+ *    GSOCK_IOERR      - low-level error. 

  */
 GSocketError GSocket_Connect(GSocket *sck, GSocketStream stream)
 {
  */
 GSocketError GSocket_Connect(GSocket *sck, GSocketStream stream)
 {

+  int ret, err;

   u_long arg = 1;
   u_long arg = 1;

-  int type, ret, err;

 
   assert(sck != NULL);
 
 
   assert(sck != NULL);
 

+  /* Enable CONNECTION events (needed for nonblocking connections) */

   sck->m_detected &= ~GSOCK_CONNECTION_FLAG;
 
   if (sck->m_fd != INVALID_SOCKET)
   sck->m_detected &= ~GSOCK_CONNECTION_FLAG;
 
   if (sck->m_fd != INVALID_SOCKET)


@@ -529,18 +471,15 @@ GSocketError GSocket_Connect(GSocket *sck, GSocketStream stream)
     return GSOCK_INVADDR;
   }
 
     return GSOCK_INVADDR;
   }
 

-  /* Test whether we want the socket to be a stream (e.g. TCP) */
+  /* Streamed or dgram socket? */

   sck->m_stream   = (stream == GSOCK_STREAMED);
   sck->m_oriented = TRUE;
   sck->m_server   = FALSE;
   sck->m_stream   = (stream == GSOCK_STREAMED);
   sck->m_oriented = TRUE;
   sck->m_server   = FALSE;

-
-  if (sck->m_stream)
-    type = SOCK_STREAM;
-  else
-    type = SOCK_DGRAM;
+  sck->m_establishing = FALSE;

 
   /* Create the socket */
 
   /* Create the socket */

-  sck->m_fd = socket(sck->m_peer->m_realfamily, type, 0);
+  sck->m_fd = socket(sck->m_peer->m_realfamily,
+                     sck->m_stream? SOCK_STREAM : SOCK_DGRAM, 0);

 
   if (sck->m_fd == INVALID_SOCKET)
   {
 
   if (sck->m_fd == INVALID_SOCKET)
   {


@@ -551,7 +490,7 @@ GSocketError GSocket_Connect(GSocket *sck, GSocketStream stream)
   ioctlsocket(sck->m_fd, FIONBIO, (u_long FAR *) &arg);
   _GSocket_Enable_Events(sck);
 
   ioctlsocket(sck->m_fd, FIONBIO, (u_long FAR *) &arg);
   _GSocket_Enable_Events(sck);
 

-  /* Connect it to the PEER address, with a timeout (see below) */
+  /* Connect it to the peer address, with a timeout (see below) */

   ret = connect(sck->m_fd, sck->m_peer->m_addr, sck->m_peer->m_len);
 
   if (ret == SOCKET_ERROR)
   ret = connect(sck->m_fd, sck->m_peer->m_addr, sck->m_peer->m_len);
 
   if (ret == SOCKET_ERROR)


@@ -565,15 +504,16 @@ GSocketError GSocket_Connect(GSocket *sck, GSocketStream stream)
      */
     if ((err == WSAEWOULDBLOCK) && (!sck->m_non_blocking))
     {
      */
     if ((err == WSAEWOULDBLOCK) && (!sck->m_non_blocking))
     {

-      if (_GSocket_Output_Timeout(sck) == GSOCK_TIMEDOUT)
+      err = _GSocket_Connect_Timeout(sck);
+
+      if (err != GSOCK_NOERROR)

       {
         closesocket(sck->m_fd);
         sck->m_fd = INVALID_SOCKET;
       {
         closesocket(sck->m_fd);
         sck->m_fd = INVALID_SOCKET;

-        /* sck->m_error is set in _GSocket_Output_Timeout */
-        return GSOCK_TIMEDOUT;
+        /* sck->m_error is set in _GSocket_Connect_Timeout */

       }
       }

-      else
-        return GSOCK_NOERROR;
+
+      return err;

     }
 
     /* If connect failed with EWOULDBLOCK and the GSocket object
     }
 
     /* If connect failed with EWOULDBLOCK and the GSocket object


@@ -584,12 +524,13 @@ GSocketError GSocket_Connect(GSocket *sck, GSocketStream stream)
      */
     if ((err == WSAEWOULDBLOCK) && (sck->m_non_blocking))
     {
      */
     if ((err == WSAEWOULDBLOCK) && (sck->m_non_blocking))
     {

+      sck->m_establishing = TRUE;

       sck->m_error = GSOCK_WOULDBLOCK;
       return GSOCK_WOULDBLOCK;
     }
 
     /* If connect failed with an error other than EWOULDBLOCK,
       sck->m_error = GSOCK_WOULDBLOCK;
       return GSOCK_WOULDBLOCK;
     }
 
     /* If connect failed with an error other than EWOULDBLOCK,

-     * then the call to GSocket_Connect has failed.
+     * then the call to GSocket_Connect() has failed.

      */
     closesocket(sck->m_fd);
     sck->m_fd = INVALID_SOCKET;
      */
     closesocket(sck->m_fd);
     sck->m_fd = INVALID_SOCKET;


@@ -600,6 +541,71 @@ GSocketError GSocket_Connect(GSocket *sck, GSocketStream stream)
   return GSOCK_NOERROR;
 }
 
   return GSOCK_NOERROR;
 }
 

+/* Datagram sockets */
+
+/* GSocket_SetNonOriented:
+ *  Sets up this socket as a non-connection oriented (datagram) socket.
+ *  Before using this function, the local address must have been set
+ *  with GSocket_SetLocal(), or the call will fail. Returns GSOCK_NOERROR
+ *  on success, or one of the following otherwise.
+ *
+ *  Error codes:
+ *    GSOCK_INVSOCK - the socket is in use.
+ *    GSOCK_INVADDR - the local address has not been set.
+ *    GSOCK_IOERR   - low-level error. 
+ */
+GSocketError GSocket_SetNonOriented(GSocket *sck)
+{
+  u_long arg = 1;
+
+  assert(sck != NULL);
+
+  if (sck->m_fd != INVALID_SOCKET)
+  {
+    sck->m_error = GSOCK_INVSOCK;
+    return GSOCK_INVSOCK;
+  }
+
+  if (!sck->m_local)
+  {
+    sck->m_error = GSOCK_INVADDR;
+    return GSOCK_INVADDR;
+  }
+
+  /* Initialize all fields */
+  sck->m_stream   = FALSE;
+  sck->m_server   = FALSE;
+  sck->m_oriented = FALSE;
+
+  /* Create the socket */
+  sck->m_fd = socket(sck->m_local->m_realfamily, SOCK_DGRAM, 0);
+
+  if (sck->m_fd == INVALID_SOCKET)
+  {
+    sck->m_error = GSOCK_IOERR;
+    return GSOCK_IOERR;
+  }
+
+  ioctlsocket(sck->m_fd, FIONBIO, (u_long FAR *) &arg);
+  _GSocket_Enable_Events(sck);
+
+  /* Bind to the local address,
+   * and retrieve the actual address bound.
+   */
+  if ((bind(sck->m_fd, sck->m_local->m_addr, sck->m_local->m_len) != 0) ||
+      (getsockname(sck->m_fd,
+                   sck->m_local->m_addr,
+                   (SOCKLEN_T *)&sck->m_local->m_len) != 0))
+  {
+    closesocket(sck->m_fd);
+    sck->m_fd    = INVALID_SOCKET;
+    sck->m_error = GSOCK_IOERR;
+    return GSOCK_IOERR;
+  }
+
+  return GSOCK_NOERROR;
+}
+

 /* Generic IO */
 
 /* Like recv(), send(), ... */
 /* Generic IO */
 
 /* Like recv(), send(), ... */


@@ -609,6 +615,7 @@ int GSocket_Read(GSocket *socket, char *buffer, int size)
 
   assert(socket != NULL);
 
 
   assert(socket != NULL);
 

+  /* Reenable INPUT events */

   socket->m_detected &= ~GSOCK_INPUT_FLAG;
 
   if (socket->m_fd == INVALID_SOCKET || socket->m_server)
   socket->m_detected &= ~GSOCK_INPUT_FLAG;
 
   if (socket->m_fd == INVALID_SOCKET || socket->m_server)


@@ -629,27 +636,11 @@ int GSocket_Read(GSocket *socket, char *buffer, int size)
 
   if (ret == SOCKET_ERROR)
   {
 
   if (ret == SOCKET_ERROR)
   {

-    /* NOTE: Window sockets exhibit a very strange property;
-     * if the socket is in non-blocking mode (which is always
-     * the case here, no matter the setting of GSocket itself)
-     * a call to send() can fail with EWOULDBLOCK even when
-     * select() says that the socket is readable.
-     *
-     * This can break several things because, usually, if
-     * select() says that the socket is writable, it is
-     * assumed that send() won't fail. To avoid this, we
-     * return 0 instead of -1 for this special case.
-     */

     if (WSAGetLastError() != WSAEWOULDBLOCK)
     if (WSAGetLastError() != WSAEWOULDBLOCK)

-    {

       socket->m_error = GSOCK_IOERR;
       socket->m_error = GSOCK_IOERR;

-      return -1;
-    }

     else
     else

-    {

       socket->m_error = GSOCK_WOULDBLOCK;
       socket->m_error = GSOCK_WOULDBLOCK;

-      return 0;
-    }
+    return -1;

   }
 
   return ret;
   }
 
   return ret;


@@ -671,7 +662,7 @@ int GSocket_Write(GSocket *socket, const char *buffer, int size)
   if (_GSocket_Output_Timeout(socket) == GSOCK_TIMEDOUT)
     return -1;
 
   if (_GSocket_Output_Timeout(socket) == GSOCK_TIMEDOUT)
     return -1;
 

-  /* Read the data */
+  /* Write the data */

   if (socket->m_stream)
     ret = _GSocket_Send_Stream(socket, buffer, size);
   else
   if (socket->m_stream)
     ret = _GSocket_Send_Stream(socket, buffer, size);
   else


@@ -684,6 +675,11 @@ int GSocket_Write(GSocket *socket, const char *buffer, int size)
     else
       socket->m_error = GSOCK_WOULDBLOCK;
 
     else
       socket->m_error = GSOCK_WOULDBLOCK;
 

+    /* Only reenable OUTPUT events after an error (just like WSAAsyncSelect
+     * does). Once the first OUTPUT event is received, users can assume
+     * that the socket is writable until a read operation fails. Only then
+     * will further OUTPUT events be posted.
+     */

     socket->m_detected &= ~GSOCK_OUTPUT_FLAG;
     return -1;
   }
     socket->m_detected &= ~GSOCK_OUTPUT_FLAG;
     return -1;
   }


@@ -696,22 +692,83 @@ int GSocket_Write(GSocket *socket, const char *buffer, int size)
  *  check for the events specified in the 'flags' parameter, and
  *  it will return a mask indicating which operations can be
  *  performed. This function won't block, regardless of the
  *  check for the events specified in the 'flags' parameter, and
  *  it will return a mask indicating which operations can be
  *  performed. This function won't block, regardless of the

- *  mode (blocking|nonblocking) of the socket.
+ *  mode (blocking | nonblocking) of the socket.

  */
 GSocketEventFlags GSocket_Select(GSocket *socket, GSocketEventFlags flags)
 {
  */
 GSocketEventFlags GSocket_Select(GSocket *socket, GSocketEventFlags flags)
 {

+#if defined(wxUSE_GUI) && !wxUSE_GUI
+
+  GSocketEventFlags result = 0;
+  fd_set readfds;
+  fd_set writefds;
+  fd_set exceptfds;
+  static const struct timeval tv = { 0, 0 };
+

   assert(socket != NULL);
 
   assert(socket != NULL);
 

-  return (flags & socket->m_detected);
+  FD_ZERO(&readfds);
+  FD_ZERO(&writefds);
+  FD_ZERO(&exceptfds);
+  FD_SET(socket->m_fd, &readfds);
+  FD_SET(socket->m_fd, &writefds);
+  FD_SET(socket->m_fd, &exceptfds);
+
+  /* Check known state first */
+  result |= (GSOCK_CONNECTION_FLAG & socket->m_detected & flags);
+  result |= (GSOCK_LOST_FLAG       & socket->m_detected & flags);
+
+  /* Try select now */
+  if (select(socket->m_fd + 1, &readfds, &writefds, &exceptfds, &tv) <= 0)
+    return result;
+
+  /* Check for readability */
+  if (FD_ISSET(socket->m_fd, &readfds))
+  {
+    /* Assume that closure of the socket is always reported via exceptfds */
+    if (socket->m_server && socket->m_stream)
+      result |= (GSOCK_CONNECTION_FLAG & flags);
+    else
+      result |= (GSOCK_INPUT_FLAG & flags);
+  }
+
+  /* Check for writability */
+  if (FD_ISSET(socket->m_fd, &writefds))
+  {
+    if (socket->m_establishing && !socket->m_server)
+    {
+      result |= (GSOCK_CONNECTION_FLAG & flags);
+      socket->m_establishing = FALSE;
+      socket->m_detected |= GSOCK_CONNECTION_FLAG;
+    }
+    else
+      result |= (GSOCK_OUTPUT_FLAG & flags);
+  }
+
+  /* Check for exceptions and errors */
+  if (FD_ISSET(socket->m_fd, &exceptfds))
+  {
+    result |= (GSOCK_LOST_FLAG & flags);
+    socket->m_establishing = FALSE;
+    socket->m_detected = GSOCK_LOST_FLAG;
+  }
+
+  return result;
+
+#else 
+
+  assert(socket != NULL);
+  return flags & socket->m_detected;
+
+#endif /* !wxUSE_GUI */

 }
 
 }
 

-/* Flags */
+/* Attributes */

 
 /* GSocket_SetNonBlocking:
 
 /* GSocket_SetNonBlocking:

- *  Sets the socket to non-blocking mode. This is useful if
- *  we don't want to wait.
+ *  Sets the socket to non-blocking mode. All IO calls will return
+ *  immediately.

  */
  */

-void GSocket_SetNonBlocking(GSocket *socket, bool non_block)
+void GSocket_SetNonBlocking(GSocket *socket, int non_block)

 {
   assert(socket != NULL);
 
 {
   assert(socket != NULL);
 


@@ -719,8 +776,8 @@ void GSocket_SetNonBlocking(GSocket *socket, bool non_block)
 }
 
 /* GSocket_SetTimeout:
 }
 
 /* GSocket_SetTimeout:

- *  Sets the timeout for blocking calls. Time is
- *  expressed in milliseconds.
+ *  Sets the timeout for blocking calls. Time is expressed in
+ *  milliseconds.

  */
 void GSocket_SetTimeout(GSocket *socket, unsigned long millis)
 {
  */
 void GSocket_SetTimeout(GSocket *socket, unsigned long millis)
 {


@@ -731,7 +788,9 @@ void GSocket_SetTimeout(GSocket *socket, unsigned long millis)
 }
 
 /* GSocket_GetError:
 }
 
 /* GSocket_GetError:

- *  Returns the last error occured for this socket.
+ *  Returns the last error occured for this socket. Note that successful
+ *  operations do not clear this back to GSOCK_NOERROR, so use it only
+ *  after an error.

  */
 GSocketError GSocket_GetError(GSocket *socket)
 {
  */
 GSocketError GSocket_GetError(GSocket *socket)
 {


@@ -742,20 +801,24 @@ GSocketError GSocket_GetError(GSocket *socket)
 
 /* Callbacks */
 
 
 /* Callbacks */
 

-/* Only one callback is possible for each event (INPUT, OUTPUT, CONNECTION
- * and LOST). The callbacks are called in the following situations:
- *
- * INPUT: There is at least one byte in the input buffer
- * OUTPUT: The system is sure that the next write call will not block
- * CONNECTION: Two cases are possible:
- *           Client socket -> the connection is established
- *           Server socket -> a client requests a connection
- * LOST: The connection is lost
- *
- * An event is generated only once and its state is reseted when the
- * relative IO call is requested.
- * For example: INPUT -> GSocket_Read()
- *              CONNECTION -> GSocket_Accept()
+/* GSOCK_INPUT:
+ *   There is data to be read in the input buffer. If, after a read
+ *   operation, there is still data available, the callback function will
+ *   be called again.
+ * GSOCK_OUTPUT:
+ *   The socket is available for writing. That is, the next write call 
+ *   won't block. This event is generated only once, when the connection is
+ *   first established, and then only if a call failed with GSOCK_WOULDBLOCK,
+ *   when the output buffer empties again. This means that the app should
+ *   assume that it can write since the first OUTPUT event, and no more
+ *   OUTPUT events will be generated unless an error occurs.
+ * GSOCK_CONNECTION:
+ *   Connection succesfully established, for client sockets, or incoming
+ *   client connection, for server sockets. Wait for this event (also watch
+ *   out for GSOCK_LOST) after you issue a nonblocking GSocket_Connect() call.
+ * GSOCK_LOST:
+ *   The connection is lost (or a connection request failed); this could
+ *   be due to a failure, or due to the peer closing it gracefully.

  */
 
 /* GSocket_SetCallback:
  */
 
 /* GSocket_SetCallback:


@@ -771,7 +834,7 @@ void GSocket_SetCallback(GSocket *socket, GSocketEventFlags flags,
 {
   int count;
 
 {
   int count;
 

-  assert (socket != NULL);
+  assert(socket != NULL);

 
   for (count = 0; count < GSOCK_MAX_EVENT; count++)
   {
 
   for (count = 0; count < GSOCK_MAX_EVENT; count++)
   {


@@ -789,7 +852,7 @@ void GSocket_SetCallback(GSocket *socket, GSocketEventFlags flags,
  */
 void GSocket_UnsetCallback(GSocket *socket, GSocketEventFlags flags)
 {
  */
 void GSocket_UnsetCallback(GSocket *socket, GSocketEventFlags flags)
 {

-  int count = 0;
+  int count;

 
   assert(socket != NULL);
 
 
   assert(socket != NULL);
 


@@ -803,106 +866,7 @@ void GSocket_UnsetCallback(GSocket *socket, GSocketEventFlags flags)
   }
 }
 
   }
 }
 

-
-/* Internals */
-
-/* _GSocket_Enable_Events:
- *  We enable all event notifications here (we need to be notified
- *  of all events for internal processing) but we will only notify
- *  users when an appropiate callback function has been installed.
- */
-void _GSocket_Enable_Events(GSocket *socket)
-{
-  assert (socket != NULL);
-
-  if (socket->m_fd != INVALID_SOCKET)
-  {
-    WSAAsyncSelect(socket->m_fd, hWin, socket->m_msgnumber,
-                   FD_READ | FD_WRITE | FD_ACCEPT | FD_CONNECT | FD_CLOSE);
-  }
-}
-
-/* _GSocket_Disable_Events:
- *  Disable event notifications (when shutdowning the socket)
- */
-void _GSocket_Disable_Events(GSocket *socket)
-{
-  assert (socket != NULL);
-
-  if (socket->m_fd != INVALID_SOCKET)
-  {
-    WSAAsyncSelect(socket->m_fd, hWin, socket->m_msgnumber, 0);
-  }
-}
-
-
-LRESULT CALLBACK _GSocket_Internal_WinProc(HWND hWnd,
-                                           UINT uMsg,
-                                           WPARAM wParam,
-                                           LPARAM lParam)
-{
-  GSocket *socket;
-  GSocketEvent event;
-  GSocketCallback cback;
-  char *data;
-
-  if (uMsg >= WM_USER && uMsg <= (WM_USER + MAXSOCKETS - 1))
-  {
-    EnterCriticalSection(&critical);
-    socket = socketList[(uMsg - WM_USER)];
-    event = -1;
-    cback = NULL;
-    data = NULL;
-
-    /* Check that the socket still exists (it has not been
-     * destroyed) and for safety, check that the m_fd field
-     * is what we expect it to be.
-     */
-    if ((socket != NULL) && (socket->m_fd == wParam))
-    {
-      switch WSAGETSELECTEVENT(lParam)
-      {
-        case FD_READ:    event = GSOCK_INPUT; break;
-        case FD_WRITE:   event = GSOCK_OUTPUT; break;
-        case FD_ACCEPT:  event = GSOCK_CONNECTION; break;
-        case FD_CONNECT:
-        {
-          if (WSAGETSELECTERROR(lParam) != 0)
-            event = GSOCK_LOST;
-          else
-            event = GSOCK_CONNECTION;
-          break;
-        }
-        case FD_CLOSE:   event = GSOCK_LOST; break;
-      }
-
-      if (event != -1)
-      {
-        cback = socket->m_cbacks[event];
-        data = socket->m_data[event];
-
-        if (event == GSOCK_LOST)
-          socket->m_detected = GSOCK_LOST_FLAG;
-        else
-          socket->m_detected |= (1 << event);
-      }
-    }
-
-    /* OK, we can now leave the critical section because we have
-     * already obtained the callback address (we make no further
-     * accesses to socket->whatever)
-     */
-    LeaveCriticalSection(&critical);
-
-    if (cback != NULL)
-      (cback)(socket, event, data);
-
-    return (LRESULT) 0;
-  }
-  else
-    return DefWindowProc(hWnd, uMsg, wParam, lParam);
-}
-
+/* Internals (IO) */

 
 /* _GSocket_Input_Timeout:
  *  For blocking sockets, wait until data is available or
 
 /* _GSocket_Input_Timeout:
  *  For blocking sockets, wait until data is available or


@@ -946,6 +910,33 @@ GSocketError _GSocket_Output_Timeout(GSocket *socket)
   return GSOCK_NOERROR;
 }
 
   return GSOCK_NOERROR;
 }
 

+/* _GSocket_Connect_Timeout:
+ *  For blocking sockets, wait until the connection is
+ *  established or fails, or until timeout ellapses.
+ */
+GSocketError _GSocket_Connect_Timeout(GSocket *socket)
+{
+  fd_set writefds;
+  fd_set exceptfds;
+
+  FD_ZERO(&writefds);
+  FD_ZERO(&exceptfds);
+  FD_SET(socket->m_fd, &writefds);
+  FD_SET(socket->m_fd, &exceptfds);
+  if (select(0, NULL, &writefds, &exceptfds, &socket->m_timeout) == 0)
+  {
+    socket->m_error = GSOCK_TIMEDOUT;
+    return GSOCK_TIMEDOUT;
+  }
+  if (!FD_ISSET(socket->m_fd, &writefds))
+  {
+    socket->m_error = GSOCK_IOERR;
+    return GSOCK_IOERR;
+  }
+
+  return GSOCK_NOERROR;
+}
+

 int _GSocket_Recv_Stream(GSocket *socket, char *buffer, int size)
 {
   return recv(socket->m_fd, buffer, size, 0);
 int _GSocket_Recv_Stream(GSocket *socket, char *buffer, int size)
 {
   return recv(socket->m_fd, buffer, size, 0);


@@ -956,6 +947,7 @@ int _GSocket_Recv_Dgram(GSocket *socket, char *buffer, int size)
   struct sockaddr from;
   SOCKLEN_T fromlen = sizeof(from);
   int ret;
   struct sockaddr from;
   SOCKLEN_T fromlen = sizeof(from);
   int ret;

+  GSocketError err;

 
   ret = recvfrom(socket->m_fd, buffer, size, 0, &from, &fromlen);
 
 
   ret = recvfrom(socket->m_fd, buffer, size, 0, &from, &fromlen);
 


@@ -972,10 +964,12 @@ int _GSocket_Recv_Dgram(GSocket *socket, char *buffer, int size)
       return -1;
     }
   }
       return -1;
     }
   }

-  if (_GAddress_translate_from(socket->m_peer, &from, fromlen) != GSOCK_NOERROR)
+  err = _GAddress_translate_from(socket->m_peer, &from, fromlen);
+  if (err != GSOCK_NOERROR)

   {
   {

-    socket->m_error = GSOCK_MEMERR;

     GAddress_destroy(socket->m_peer);
     GAddress_destroy(socket->m_peer);

+    socket->m_peer  = NULL;
+    socket->m_error = err;

     return -1;
   }
 
     return -1;
   }
 


@@ -991,6 +985,7 @@ int _GSocket_Send_Dgram(GSocket *socket, const char *buffer, int size)
 {
   struct sockaddr *addr;
   int len, ret;
 {
   struct sockaddr *addr;
   int len, ret;

+  GSocketError err;

 
   if (!socket->m_peer)
   {
 
   if (!socket->m_peer)
   {


@@ -998,9 +993,10 @@ int _GSocket_Send_Dgram(GSocket *socket, const char *buffer, int size)
     return -1;
   }
 
     return -1;
   }
 

-  if (!_GAddress_translate_to(socket->m_peer, &addr, &len))
+  err = _GAddress_translate_to(socket->m_peer, &addr, &len);
+  if (err != GSOCK_NOERROR)

   {
   {

-    socket->m_error = GSOCK_MEMERR;
+    socket->m_error = err;

     return -1;
   }
 
     return -1;
   }
 


@@ -1019,23 +1015,39 @@ int _GSocket_Send_Dgram(GSocket *socket, const char *buffer, int size)
  * -------------------------------------------------------------------------
  */
 
  * -------------------------------------------------------------------------
  */
 

-/* CHECK_ADDRESS verifies that the current family is either GSOCK_NOFAMILY
- * or GSOCK_*family*, and if it is GSOCK_NOFAMILY, it initalizes address
- * to be a GSOCK_*family*. In other cases, it returns GSOCK_INVADDR.
+/* CHECK_ADDRESS verifies that the current address family is either
+ * GSOCK_NOFAMILY or GSOCK_*family*, and if it is GSOCK_NOFAMILY, it
+ * initalizes it to be a GSOCK_*family*. In other cases, it returns
+ * an appropiate error code.
+ *
+ * CHECK_ADDRESS_RETVAL does the same but returning 'retval' on error.

  */
  */

-#define CHECK_ADDRESS(address, family, retval)                      \
+#define CHECK_ADDRESS(address, family)                              \

 {                                                                   \
   if (address->m_family == GSOCK_NOFAMILY)                          \
     if (_GAddress_Init_##family(address) != GSOCK_NOERROR)          \
       return address->m_error;                                      \
   if (address->m_family != GSOCK_##family)                          \
 {                                                                   \
   if (address->m_family == GSOCK_NOFAMILY)                          \
     if (_GAddress_Init_##family(address) != GSOCK_NOERROR)          \
       return address->m_error;                                      \
   if (address->m_family != GSOCK_##family)                          \

+  {                                                                 \
+    address->m_error = GSOCK_INVADDR;                               \
+    return GSOCK_INVADDR;                                           \
+  }                                                                 \
+}
+
+#define CHECK_ADDRESS_RETVAL(address, family, retval)               \
+{                                                                   \
+  if (address->m_family == GSOCK_NOFAMILY)                          \
+    if (_GAddress_Init_##family(address) != GSOCK_NOERROR)          \
+      return retval;                                                \
+  if (address->m_family != GSOCK_##family)                          \

   {                                                                 \
     address->m_error = GSOCK_INVADDR;                               \
     return retval;                                                  \
   }                                                                 \
 }
 
   {                                                                 \
     address->m_error = GSOCK_INVADDR;                               \
     return retval;                                                  \
   }                                                                 \
 }
 

-GAddress *GAddress_new()
+
+GAddress *GAddress_new(void)

 {
   GAddress *address;
 
 {
   GAddress *address;
 


@@ -1078,6 +1090,9 @@ void GAddress_destroy(GAddress *address)
 {
   assert(address != NULL);
 
 {
   assert(address != NULL);
 

+  if (address->m_addr)
+    free(address->m_addr);
+

   free(address);
 }
 
   free(address);
 }
 


@@ -1164,7 +1179,7 @@ GSocketError _GAddress_translate_to(GAddress *address,
 
 GSocketError _GAddress_Init_INET(GAddress *address)
 {
 
 GSocketError _GAddress_Init_INET(GAddress *address)
 {

-  address->m_len = sizeof(struct sockaddr_in);
+  address->m_len  = sizeof(struct sockaddr_in);

   address->m_addr = (struct sockaddr *) malloc(address->m_len);
   if (address->m_addr == NULL)
   {
   address->m_addr = (struct sockaddr *) malloc(address->m_len);
   if (address->m_addr == NULL)
   {


@@ -1175,7 +1190,7 @@ GSocketError _GAddress_Init_INET(GAddress *address)
   address->m_family = GSOCK_INET;
   address->m_realfamily = PF_INET;
   ((struct sockaddr_in *)address->m_addr)->sin_family = AF_INET;
   address->m_family = GSOCK_INET;
   address->m_realfamily = PF_INET;
   ((struct sockaddr_in *)address->m_addr)->sin_family = AF_INET;

-  ((struct sockaddr_in *)address->m_addr)->sin_addr.s_addr = INADDR_NONE;
+  ((struct sockaddr_in *)address->m_addr)->sin_addr.s_addr = INADDR_ANY;

 
   return GSOCK_NOERROR;
 }
 
   return GSOCK_NOERROR;
 }


@@ -1187,7 +1202,7 @@ GSocketError GAddress_INET_SetHostName(GAddress *address, const char *hostname)
 
   assert(address != NULL);
 
 
   assert(address != NULL);
 

-  CHECK_ADDRESS(address, INET, GSOCK_INVADDR);
+  CHECK_ADDRESS(address, INET);

 
   addr = &(((struct sockaddr_in *)address->m_addr)->sin_addr);
 
 
   addr = &(((struct sockaddr_in *)address->m_addr)->sin_addr);
 


@@ -1201,6 +1216,7 @@ GSocketError GAddress_INET_SetHostName(GAddress *address, const char *hostname)
     /* It is a real name, we solve it */
     if ((he = gethostbyname(hostname)) == NULL)
     {
     /* It is a real name, we solve it */
     if ((he = gethostbyname(hostname)) == NULL)
     {

+      /* addr->s_addr = INADDR_NONE just done by inet_addr() above */

       address->m_error = GSOCK_NOHOST;
       return GSOCK_NOHOST;
     }
       address->m_error = GSOCK_NOHOST;
       return GSOCK_NOHOST;
     }


@@ -1210,6 +1226,11 @@ GSocketError GAddress_INET_SetHostName(GAddress *address, const char *hostname)
   return GSOCK_NOERROR;
 }
 
   return GSOCK_NOERROR;
 }
 

+GSocketError GAddress_INET_SetAnyAddress(GAddress *address)
+{
+  return GAddress_INET_SetHostAddress(address, INADDR_ANY);
+}
+

 GSocketError GAddress_INET_SetHostAddress(GAddress *address,
                                           unsigned long hostaddr)
 {
 GSocketError GAddress_INET_SetHostAddress(GAddress *address,
                                           unsigned long hostaddr)
 {


@@ -1217,7 +1238,7 @@ GSocketError GAddress_INET_SetHostAddress(GAddress *address,
 
   assert(address != NULL);
 
 
   assert(address != NULL);
 

-  CHECK_ADDRESS(address, INET, GSOCK_INVADDR);
+  CHECK_ADDRESS(address, INET);

 
   addr = &(((struct sockaddr_in *)address->m_addr)->sin_addr);
   addr->s_addr = hostaddr;
 
   addr = &(((struct sockaddr_in *)address->m_addr)->sin_addr);
   addr->s_addr = hostaddr;


@@ -1232,12 +1253,12 @@ GSocketError GAddress_INET_SetPortName(GAddress *address, const char *port,
   struct sockaddr_in *addr;
 
   assert(address != NULL);
   struct sockaddr_in *addr;
 
   assert(address != NULL);

-  CHECK_ADDRESS(address, INET, GSOCK_INVADDR);
+  CHECK_ADDRESS(address, INET);

 
   if (!port)
   {
     address->m_error = GSOCK_INVPORT;
 
   if (!port)
   {
     address->m_error = GSOCK_INVPORT;

-    return GSOCK_INVOP;
+    return GSOCK_INVPORT;

   }
 
   se = getservbyname(port, protocol);
   }
 
   se = getservbyname(port, protocol);


@@ -1268,7 +1289,7 @@ GSocketError GAddress_INET_SetPort(GAddress *address, unsigned short port)
   struct sockaddr_in *addr;
 
   assert(address != NULL);
   struct sockaddr_in *addr;
 
   assert(address != NULL);

-  CHECK_ADDRESS(address, INET, GSOCK_INVADDR);
+  CHECK_ADDRESS(address, INET);

 
   addr = (struct sockaddr_in *)address->m_addr;
   addr->sin_port = htons(port);
 
   addr = (struct sockaddr_in *)address->m_addr;
   addr->sin_port = htons(port);


@@ -1283,7 +1304,7 @@ GSocketError GAddress_INET_GetHostName(GAddress *address, char *hostname, size_t
   struct sockaddr_in *addr;
 
   assert(address != NULL);
   struct sockaddr_in *addr;
 
   assert(address != NULL);

-  CHECK_ADDRESS(address, INET, GSOCK_INVADDR);
+  CHECK_ADDRESS(address, INET);

 
   addr = (struct sockaddr_in *)address->m_addr;
   addr_buf = (char *)&(addr->sin_addr);
 
   addr = (struct sockaddr_in *)address->m_addr;
   addr_buf = (char *)&(addr->sin_addr);


@@ -1305,7 +1326,7 @@ unsigned long GAddress_INET_GetHostAddress(GAddress *address)
   struct sockaddr_in *addr;
 
   assert(address != NULL);
   struct sockaddr_in *addr;
 
   assert(address != NULL);

-  CHECK_ADDRESS(address, INET, 0);
+  CHECK_ADDRESS_RETVAL(address, INET, 0);

 
   addr = (struct sockaddr_in *)address->m_addr;
 
 
   addr = (struct sockaddr_in *)address->m_addr;
 


@@ -1317,7 +1338,7 @@ unsigned short GAddress_INET_GetPort(GAddress *address)
   struct sockaddr_in *addr;
 
   assert(address != NULL);
   struct sockaddr_in *addr;
 
   assert(address != NULL);

-  CHECK_ADDRESS(address, INET, 0);
+  CHECK_ADDRESS_RETVAL(address, INET, 0);

 
   addr = (struct sockaddr_in *)address->m_addr;
   return ntohs(addr->sin_port);
 
   addr = (struct sockaddr_in *)address->m_addr;
   return ntohs(addr->sin_port);


@@ -1353,22 +1374,9 @@ GSocketError GAddress_UNIX_GetPath(GAddress *address, char *path, size_t sbuf)
 #else /* !wxUSE_SOCKETS */
 
 /* 
 #else /* !wxUSE_SOCKETS */
 
 /* 

- * translation unit shouldn't be empty, so include this typedef to make the
+ * Translation unit shouldn't be empty, so include this typedef to make the

  * compiler (VC++ 6.0, for example) happy
  */
 typedef (*wxDummy)();
 
 #endif  /* wxUSE_SOCKETS || defined(__GSOCKET_STANDALONE__) */
  * compiler (VC++ 6.0, for example) happy
  */
 typedef (*wxDummy)();
 
 #endif  /* wxUSE_SOCKETS || defined(__GSOCKET_STANDALONE__) */

-
-/* Diferencias con la version Unix:
- *  - El descriptor es SOCKET y no int
- *  - Constantes -1 pasan a INVALID_SOCKET
- *  - Errores en muchas funciones pasan de -1 o <0 a SOCKET_ERROR
- *  - ioctl y close pasan a ioctlsocket y closesocket
- *  - inet_addr en lugar de inet_aton
- *  - Codigo de inicializacion y terminacion para inicializar y
- *    terminar WinSocket y para la ventana interna.
- *  - SetTimeout, SetNonBlocking y la implementacion de los
- *    timeouts eran bastante diferentes, pero ahora se han
- *    hecho en la version Unix igual que en esta.
- */