/* -------------------------------------------------------------------------
- * Project: GSocket (Generic Socket) for WX
+ * Project: GSocket (Generic Socket)
* Name: gsocket.c
+ * Author: Guillermo Rodriguez Garcia <guille@iies.es>
* 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__
+# include "wx/defs.h"
+# 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
-
-#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__ */
+/* 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 <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
-/* 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)
{
socket->m_cbacks[i] = NULL;
}
+ socket->m_detected = 0;
socket->m_local = NULL;
socket->m_peer = NULL;
socket->m_error = GSOCK_NOERROR;
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;
}
{
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)
if (socket->m_peer)
GAddress_destroy(socket->m_peer);
- /* Destroy socket itself */
+ /* Destroy the socket itself */
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;
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_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);
+ /* 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;
}
+ /* check address */
if (address == NULL || address->m_family == GSOCK_NOFAMILY)
{
socket->m_error = GSOCK_INVADDR;
{
assert(socket != NULL);
+ /* check address */
if (address == NULL || address->m_family == GSOCK_NOFAMILY)
{
socket->m_error = GSOCK_INVADDR;
{
GAddress *address;
struct sockaddr addr;
- SOCKLEN_T size;
+ SOCKLEN_T size = sizeof(addr);
+ GSocketError err;
assert(socket != NULL);
+ /* try to get it from the m_local var first */
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;
}
- size = sizeof(addr);
-
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;
}
- 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);
+ socket->m_error = err;
return NULL;
}
{
assert(socket != NULL);
+ /* try to get it from the m_peer var */
if (socket->m_peer)
return GAddress_copy(socket->m_peer);
/* 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)
{
assert(sck != NULL);
+ /* must not be in use */
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;
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;
}
/* 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;
+ struct sockaddr from;
+ SOCKLEN_T fromlen = sizeof(from);
+ GSocketError err;
u_long arg = 1;
assert(sck != NULL);
+ /* Reenable CONNECTION events */
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;
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)
{
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)
- {
- 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)
+ /* Setup the peer address field */
+ connection->m_peer = GAddress_new();
+ if (!connection->m_peer)
{
- 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:
- * 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)
{
+ int ret, err;
u_long arg = 1;
- int type, ret, err;
assert(sck != NULL);
+ /* Enable CONNECTION events (needed for nonblocking connections) */
sck->m_detected &= ~GSOCK_CONNECTION_FLAG;
if (sck->m_fd != INVALID_SOCKET)
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;
-
- if (sck->m_stream)
- type = SOCK_STREAM;
- else
- type = SOCK_DGRAM;
+ sck->m_establishing = FALSE;
/* 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)
{
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)
*/
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;
- /* 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 ((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,
- * 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;
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(), ... */
assert(socket != NULL);
+ /* Reenable INPUT events */
socket->m_detected &= ~GSOCK_INPUT_FLAG;
if (socket->m_fd == INVALID_SOCKET || socket->m_server)
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)
- {
socket->m_error = GSOCK_IOERR;
- return -1;
- }
else
- {
socket->m_error = GSOCK_WOULDBLOCK;
- return 0;
- }
+ return -1;
}
return ret;
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
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;
}
* 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)
{
+#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);
- 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:
- * 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);
}
/* 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)
{
}
/* 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)
{
/* 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:
{
int count;
- assert (socket != NULL);
+ assert(socket != NULL);
for (count = 0; count < GSOCK_MAX_EVENT; count++)
{
*/
void GSocket_UnsetCallback(GSocket *socket, GSocketEventFlags flags)
{
- int count = 0;
+ int count;
assert(socket != NULL);
}
}
-
-/* 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
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);
struct sockaddr from;
SOCKLEN_T fromlen = sizeof(from);
int ret;
+ GSocketError err;
ret = recvfrom(socket->m_fd, buffer, size, 0, &from, &fromlen);
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);
+ socket->m_peer = NULL;
+ socket->m_error = err;
return -1;
}
{
struct sockaddr *addr;
int len, ret;
+ GSocketError err;
if (!socket->m_peer)
{
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;
}
* -------------------------------------------------------------------------
*/
-/* 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) \
+ { \
+ 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; \
} \
}
-GAddress *GAddress_new()
+
+GAddress *GAddress_new(void)
{
GAddress *address;
{
assert(address != NULL);
+ if (address->m_addr)
+ free(address->m_addr);
+
free(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)
{
assert(address != NULL);
- CHECK_ADDRESS(address, INET, GSOCK_INVADDR);
+ CHECK_ADDRESS(address, INET);
addr = &(((struct sockaddr_in *)address->m_addr)->sin_addr);
/* 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;
}
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)
{
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;
struct sockaddr_in *addr;
assert(address != NULL);
- CHECK_ADDRESS(address, INET, GSOCK_INVADDR);
+ CHECK_ADDRESS(address, INET);
if (!port)
{
address->m_error = GSOCK_INVPORT;
- return GSOCK_INVOP;
+ return GSOCK_INVPORT;
}
se = getservbyname(port, protocol);
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);
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);
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;
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);
#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__) */
-
-/* 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.
- */
projects / wxWidgets.git / blobdiff