Amebis/wxWidgets
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity
Files
32524c8fb857819d408fc4b90fd00ce96d65f6db
wxWidgets/src/msw/gsocket.cpp
David Elliott 32524c8fb8 C/C++ differences 
git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@28536 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
2004-07-29 02:07:42 +00:00

1554 lines
38 KiB
C++
Raw Blame History

/* -------------------------------------------------------------------------
* Project: GSocket (Generic Socket)
* Name: gsocket.c
* Author: Guillermo Rodriguez Garcia <guille@iies.es>
* Purpose: GSocket main MSW file
* Licence: The wxWindows licence
* CVSID: $Id$
* -------------------------------------------------------------------------
*/
/*
* PLEASE don't put C++ comments here - this is a C source file.
*/
#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)
#ifdef __WXWINCE__
/* windows.h results in tons of warnings at max warning level */
# ifdef _MSC_VER
# pragma warning(push, 1)
# endif
# include <windows.h>
# ifdef _MSC_VER
# pragma warning(pop)
# pragma warning(disable:4514)
# endif
#endif
#endif /* _MSC_VER */
#include <winsock.h>
#ifndef __GSOCKET_STANDALONE__
# include "wx/platform.h"
# include "wx/setup.h"
#endif
#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"
#endif /* __GSOCKET_STANDALONE__ */
#ifndef __WXWINCE__
#include <assert.h>
#else
#define assert(x)
#ifndef isdigit
#define isdigit(x) (x > 47 && x < 58)
#endif
#include "wx/msw/wince/net.h"
#endif
#include <string.h>
#include <stdio.h>
#include <stdlib.h>
#include <stddef.h>
#include <ctype.h>
/* if we use configure for MSW SOCKLEN_T will be already defined */
#ifndef SOCKLEN_T
# define SOCKLEN_T int
#endif
/* Table of GUI-related functions. We must call them indirectly because
* of wxBase and GUI separation: */
static struct GSocketGUIFunctionsTable *gs_gui_functions;
#define USE_GUI() (gs_gui_functions != NULL)
/* Define macros to simplify indirection: */
#define _GSocket_GUI_Init() \
if (gs_gui_functions) gs_gui_functions->GUI_Init()
#define _GSocket_GUI_Cleanup() \
if (gs_gui_functions) gs_gui_functions->GUI_Cleanup()
#define _GSocket_GUI_Init_Socket(socket) \
(gs_gui_functions ? gs_gui_functions->GUI_Init_Socket(socket) : 1)
#define _GSocket_GUI_Destroy_Socket(socket) \
if (gs_gui_functions) gs_gui_functions->GUI_Destroy_Socket(socket)
#define _GSocket_Enable_Events(socket) \
if (gs_gui_functions) gs_gui_functions->Enable_Events(socket)
#define _GSocket_Disable_Events(socket) \
if (gs_gui_functions) gs_gui_functions->Disable_Events(socket)
#define _GSocket_Install_Callback(socket, event) \
if (gs_gui_functions) gs_gui_functions->Install_Callback(socket, event)
#define _GSocket_Uninstall_Callback(socket, event) \
if (gs_gui_functions) gs_gui_functions->Uninstall_Callback(socket, event)
/* Global initialisers */
void GSocket_SetGUIFunctions(struct GSocketGUIFunctionsTable *guifunc)
{
gs_gui_functions = guifunc;
}
int GSocket_Init(void)
{
WSADATA wsaData;
if (gs_gui_functions)
{
if ( !gs_gui_functions->GUI_Init() )
return 0;
}
/* Initialize WinSocket */
return (WSAStartup((1 << 8) | 1, &wsaData) == 0);
}
void GSocket_Cleanup(void)
{
if (gs_gui_functions)
{
gs_gui_functions->GUI_Cleanup();
}
/* Cleanup WinSocket */
WSACleanup();
}
/* Constructors / Destructors for GSocket */
GSocket *GSocket_new(void)
{
int i, success;
GSocket *socket;
if ((socket = (GSocket *) malloc(sizeof(GSocket))) == NULL)
return NULL;
socket->m_fd = INVALID_SOCKET;
for (i = 0; i < GSOCK_MAX_EVENT; i++)
{
socket->m_cbacks[i] = NULL;
}
socket->m_detected = 0;
socket->m_local = NULL;
socket->m_peer = NULL;
socket->m_error = GSOCK_NOERROR;
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_establishing = FALSE;
socket->m_reusable = FALSE;
/* Per-socket GUI-specific initialization */
success = _GSocket_GUI_Init_Socket(socket);
if (!success)
{
free(socket);
socket = NULL;
}
return socket;
}
void GSocket_close(GSocket *socket)
{
_GSocket_Disable_Events(socket);
closesocket(socket->m_fd);
socket->m_fd = INVALID_SOCKET;
}
void GSocket_destroy(GSocket *socket)
{
assert(socket != NULL);
/* Per-socket GUI-specific cleanup */
_GSocket_GUI_Destroy_Socket(socket);
/* Check that the socket is really shutdowned */
if (socket->m_fd != INVALID_SOCKET)
GSocket_Shutdown(socket);
/* Destroy private addresses */
if (socket->m_local)
GAddress_destroy(socket->m_local);
if (socket->m_peer)
GAddress_destroy(socket->m_peer);
/* 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;
assert(socket != NULL);
/* If socket has been created, shutdown it */
if (socket->m_fd != INVALID_SOCKET)
{
shutdown(socket->m_fd, 2);
GSocket_close(socket);
}
/* Disable GUI callbacks */
for (evt = 0; evt < GSOCK_MAX_EVENT; evt++)
socket->m_cbacks[evt] = NULL;
socket->m_detected = GSOCK_LOST_FLAG;
}
/* 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;
return GSOCK_INVADDR;
}
if (socket->m_local)
GAddress_destroy(socket->m_local);
socket->m_local = GAddress_copy(address);
return GSOCK_NOERROR;
}
GSocketError GSocket_SetPeer(GSocket *socket, GAddress *address)
{
assert(socket != NULL);
/* check address */
if (address == NULL || address->m_family == GSOCK_NOFAMILY)
{
socket->m_error = GSOCK_INVADDR;
return GSOCK_INVADDR;
}
if (socket->m_peer)
GAddress_destroy(socket->m_peer);
socket->m_peer = GAddress_copy(address);
return GSOCK_NOERROR;
}
GAddress *GSocket_GetLocal(GSocket *socket)
{
GAddress *address;
struct sockaddr addr;
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;
}
if (getsockname(socket->m_fd, &addr, &size) == SOCKET_ERROR)
{
socket->m_error = GSOCK_IOERR;
return NULL;
}
/* got a valid address from getsockname, create a GAddress object */
if ((address = GAddress_new()) == NULL)
{
socket->m_error = GSOCK_MEMERR;
return NULL;
}
if ((err = _GAddress_translate_from(address, &addr, size)) != GSOCK_NOERROR)
{
GAddress_destroy(address);
socket->m_error = err;
return NULL;
}
return address;
}
GAddress *GSocket_GetPeer(GSocket *socket)
{
assert(socket != NULL);
/* try to get it from the m_peer var */
if (socket->m_peer)
return GAddress_copy(socket->m_peer);
return NULL;
}
/* Server specific parts */
/* GSocket_SetServer:
* 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)
{
u_long arg = 1;
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;
return GSOCK_INVADDR;
}
/* Initialize all fields */
sck->m_server = TRUE;
sck->m_stream = TRUE;
/* Create the socket */
sck->m_fd = socket(sck->m_local->m_realfamily, SOCK_STREAM, 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);
/* allow a socket to re-bind if the socket is in the TIME_WAIT
state after being previously closed.
*/
if (sck->m_reusable) {
setsockopt(sck->m_fd, SOL_SOCKET, SO_REUSEADDR, (const char*)&arg, sizeof(u_long));
}
/* 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))
{
GSocket_close(sck);
sck->m_error = GSOCK_IOERR;
return GSOCK_IOERR;
}
return GSOCK_NOERROR;
}
/* GSocket_WaitConnection:
* 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;
}
/* Create a GSocket object for the new connection */
connection = GSocket_new();
if (!connection)
{
sck->m_error = GSOCK_MEMERR;
return NULL;
}
/* Wait for a connection (with timeout) */
if (_GSocket_Input_Timeout(sck) == GSOCK_TIMEDOUT)
{
GSocket_destroy(connection);
/* sck->m_error set by _GSocket_Input_Timeout */
return NULL;
}
connection->m_fd = accept(sck->m_fd, &from, &fromlen);
if (connection->m_fd == INVALID_SOCKET)
{
if (WSAGetLastError() == WSAEWOULDBLOCK)
sck->m_error = GSOCK_WOULDBLOCK;
else
sck->m_error = GSOCK_IOERR;
GSocket_destroy(connection);
return NULL;
}
/* Initialize all fields */
connection->m_server = FALSE;
connection->m_stream = TRUE;
/* Setup the peer address field */
connection->m_peer = GAddress_new();
if (!connection->m_peer)
{
GSocket_destroy(connection);
sck->m_error = GSOCK_MEMERR;
return NULL;
}
err = _GAddress_translate_from(connection->m_peer, &from, fromlen);
if (err != GSOCK_NOERROR)
{
GAddress_destroy(connection->m_peer);
GSocket_destroy(connection);
sck->m_error = err;
return NULL;
}
ioctlsocket(connection->m_fd, FIONBIO, (u_long FAR *) &arg);
_GSocket_Enable_Events(connection);
return connection;
}
/* GSocket_SetReusable:
* Simply sets the m_resuable flag on the socket. GSocket_SetServer will
* make the appropriate setsockopt() call.
* Implemented as a GSocket function because clients (ie, wxSocketServer)
* don't have access to the GSocket struct information.
* Returns TRUE if the flag was set correctly, FALSE if an error occured
* (ie, if the parameter was NULL)
*/
int GSocket_SetReusable(GSocket *socket)
{
/* socket must not be null, and must not be in use/already bound */
if (NULL != socket && socket->m_fd == INVALID_SOCKET) {
socket->m_reusable = TRUE;
return TRUE;
}
return FALSE;
}
/* Client specific parts */
/* GSocket_Connect:
* 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;
assert(sck != NULL);
/* Enable CONNECTION events (needed for nonblocking connections) */
sck->m_detected &= ~GSOCK_CONNECTION_FLAG;
if (sck->m_fd != INVALID_SOCKET)
{
sck->m_error = GSOCK_INVSOCK;
return GSOCK_INVSOCK;
}
if (!sck->m_peer)
{
sck->m_error = GSOCK_INVADDR;
return GSOCK_INVADDR;
}
/* Streamed or dgram socket? */
sck->m_stream = (stream == GSOCK_STREAMED);
sck->m_server = FALSE;
sck->m_establishing = FALSE;
/* Create the socket */
sck->m_fd = socket(sck->m_peer->m_realfamily,
sck->m_stream? SOCK_STREAM : 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);
/* 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)
{
err = WSAGetLastError();
/* If connect failed with EWOULDBLOCK and the GSocket object
* is in blocking mode, we select() for the specified timeout
* checking for writability to see if the connection request
* completes.
*/
if ((err == WSAEWOULDBLOCK) && (!sck->m_non_blocking))
{
err = _GSocket_Connect_Timeout(sck);
if (err != GSOCK_NOERROR)
{
GSocket_close(sck);
/* sck->m_error is set in _GSocket_Connect_Timeout */
}
return (GSocketError) err;
}
/* If connect failed with EWOULDBLOCK and the GSocket object
* is set to nonblocking, we set m_error to GSOCK_WOULDBLOCK
* (and return GSOCK_WOULDBLOCK) but we don't close the socket;
* this way if the connection completes, a GSOCK_CONNECTION
* event will be generated, if enabled.
*/
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.
*/
GSocket_close(sck);
sck->m_error = GSOCK_IOERR;
return GSOCK_IOERR;
}
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;
/* 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))
{
GSocket_close(sck);
sck->m_error = GSOCK_IOERR;
return GSOCK_IOERR;
}
return GSOCK_NOERROR;
}
/* Generic IO */
/* Like recv(), send(), ... */
int GSocket_Read(GSocket *socket, char *buffer, int size)
{
int ret;
assert(socket != NULL);
/* Reenable INPUT events */
socket->m_detected &= ~GSOCK_INPUT_FLAG;
if (socket->m_fd == INVALID_SOCKET || socket->m_server)
{
socket->m_error = GSOCK_INVSOCK;
return -1;
}
/* If the socket is blocking, wait for data (with a timeout) */
if (_GSocket_Input_Timeout(socket) == GSOCK_TIMEDOUT)
return -1;
/* Read the data */
if (socket->m_stream)
ret = _GSocket_Recv_Stream(socket, buffer, size);
else
ret = _GSocket_Recv_Dgram(socket, buffer, size);
if (ret == SOCKET_ERROR)
{
if (WSAGetLastError() != WSAEWOULDBLOCK)
socket->m_error = GSOCK_IOERR;
else
socket->m_error = GSOCK_WOULDBLOCK;
return -1;
}
return ret;
}
int GSocket_Write(GSocket *socket, const char *buffer, int size)
{
int ret;
assert(socket != NULL);
if (socket->m_fd == INVALID_SOCKET || socket->m_server)
{
socket->m_error = GSOCK_INVSOCK;
return -1;
}
/* If the socket is blocking, wait for writability (with a timeout) */
if (_GSocket_Output_Timeout(socket) == GSOCK_TIMEDOUT)
return -1;
/* Write the data */
if (socket->m_stream)
ret = _GSocket_Send_Stream(socket, buffer, size);
else
ret = _GSocket_Send_Dgram(socket, buffer, size);
if (ret == SOCKET_ERROR)
{
if (WSAGetLastError() != WSAEWOULDBLOCK)
socket->m_error = GSOCK_IOERR;
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;
}
return ret;
}
/* GSocket_Select:
* Polls the socket to determine its status. This function will
* 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.
*/
GSocketEventFlags GSocket_Select(GSocket *socket, GSocketEventFlags flags)
{
if (!USE_GUI())
{
GSocketEventFlags result = 0;
fd_set readfds;
fd_set writefds;
fd_set exceptfds;
assert(socket != NULL);
FD_ZERO(&readfds);
FD_ZERO(&writefds);
FD_ZERO(&exceptfds);
FD_SET(socket->m_fd, &readfds);
if (flags & GSOCK_OUTPUT_FLAG || flags & GSOCK_CONNECTION_FLAG)
FD_SET(socket->m_fd, &writefds);
FD_SET(socket->m_fd, &exceptfds);
/* Check 'sticky' CONNECTION flag first */
result |= (GSOCK_CONNECTION_FLAG & socket->m_detected);
/* If we have already detected a LOST event, then don't try
* to do any further processing.
*/
if ((socket->m_detected & GSOCK_LOST_FLAG) != 0)
{
socket->m_establishing = FALSE;
return (GSOCK_LOST_FLAG & flags);
}
/* Try select now */
if (select(socket->m_fd + 1, &readfds, &writefds, &exceptfds,
&socket->m_timeout) <= 0)
{
/* What to do here? */
return (result & flags);
}
/* Check for readability */
if (FD_ISSET(socket->m_fd, &readfds))
{
char c;
if (!socket->m_stream || recv(socket->m_fd, &c, 1, MSG_PEEK) > 0)
{
result |= GSOCK_INPUT_FLAG;
}
else
{
if (socket->m_server && socket->m_stream)
{
result |= GSOCK_CONNECTION_FLAG;
socket->m_detected |= GSOCK_CONNECTION_FLAG;
}
else
{
socket->m_detected = GSOCK_LOST_FLAG;
socket->m_establishing = FALSE;
/* LOST event: Abort any further processing */
return (GSOCK_LOST_FLAG & flags);
}
}
}
/* Check for writability */
if (FD_ISSET(socket->m_fd, &writefds))
{
if (socket->m_establishing && !socket->m_server)
{
int error;
SOCKLEN_T len = sizeof(error);
socket->m_establishing = FALSE;
getsockopt(socket->m_fd, SOL_SOCKET, SO_ERROR, (char*)&error, &len);
if (error)
{
socket->m_detected = GSOCK_LOST_FLAG;
/* LOST event: Abort any further processing */
return (GSOCK_LOST_FLAG & flags);
}
else
{
result |= GSOCK_CONNECTION_FLAG;
socket->m_detected |= GSOCK_CONNECTION_FLAG;
}
}
else
{
result |= GSOCK_OUTPUT_FLAG;
}
}
/* Check for exceptions and errors (is this useful in Unices?) */
if (FD_ISSET(socket->m_fd, &exceptfds))
{
socket->m_establishing = FALSE;
socket->m_detected = GSOCK_LOST_FLAG;
/* LOST event: Abort any further processing */
return (GSOCK_LOST_FLAG & flags);
}
return (result & flags);
}
else /* USE_GUI() */
{
assert(socket != NULL);
return flags & socket->m_detected;
}
}
/* Attributes */
/* GSocket_SetNonBlocking:
* Sets the socket to non-blocking mode. All IO calls will return
* immediately.
*/
void GSocket_SetNonBlocking(GSocket *socket, int non_block)
{
assert(socket != NULL);
socket->m_non_blocking = non_block;
}
/* GSocket_SetTimeout:
* Sets the timeout for blocking calls. Time is expressed in
* milliseconds.
*/
void GSocket_SetTimeout(GSocket *socket, unsigned long millis)
{
assert(socket != NULL);
socket->m_timeout.tv_sec = (millis / 1000);
socket->m_timeout.tv_usec = (millis % 1000) * 1000;
}
/* GSocket_GetError:
* 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)
{
assert(socket != NULL);
return socket->m_error;
}
/* Callbacks */
/* 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:
* Enables the callbacks specified by 'flags'. Note that 'flags'
* may be a combination of flags OR'ed toghether, so the same
* callback function can be made to accept different events.
* The callback function must have the following prototype:
*
* void function(GSocket *socket, GSocketEvent event, char *cdata)
*/
void GSocket_SetCallback(GSocket *socket, GSocketEventFlags flags,
GSocketCallback callback, char *cdata)
{
int count;
assert(socket != NULL);
for (count = 0; count < GSOCK_MAX_EVENT; count++)
{
if ((flags & (1 << count)) != 0)
{
socket->m_cbacks[count] = callback;
socket->m_data[count] = cdata;
}
}
}
/* GSocket_UnsetCallback:
* Disables all callbacks specified by 'flags', which may be a
* combination of flags OR'ed toghether.
*/
void GSocket_UnsetCallback(GSocket *socket, GSocketEventFlags flags)
{
int count;
assert(socket != NULL);
for (count = 0; count < GSOCK_MAX_EVENT; count++)
{
if ((flags & (1 << count)) != 0)
{
socket->m_cbacks[count] = NULL;
socket->m_data[count] = NULL;
}
}
}
GSocketError GSocket_GetSockOpt(GSocket *socket, int level, int optname,
void *optval, int *optlen)
{
if (getsockopt(socket->m_fd, level, optname, (char*)optval, optlen) == 0)
{
return GSOCK_NOERROR;
}
return GSOCK_OPTERR;
}
GSocketError GSocket_SetSockOpt(GSocket *socket, int level, int optname,
const void *optval, int optlen)
{
if (setsockopt(socket->m_fd, level, optname, (char*)optval, optlen) == 0)
{
return GSOCK_NOERROR;
}
return GSOCK_OPTERR;
}
/* Internals (IO) */
/* _GSocket_Input_Timeout:
* For blocking sockets, wait until data is available or
* until timeout ellapses.
*/
GSocketError _GSocket_Input_Timeout(GSocket *socket)
{
fd_set readfds;
if (!socket->m_non_blocking)
{
FD_ZERO(&readfds);
FD_SET(socket->m_fd, &readfds);
if (select(0, &readfds, NULL, NULL, &socket->m_timeout) == 0)
{
socket->m_error = GSOCK_TIMEDOUT;
return GSOCK_TIMEDOUT;
}
}
return GSOCK_NOERROR;
}
/* _GSocket_Output_Timeout:
* For blocking sockets, wait until data can be sent without
* blocking or until timeout ellapses.
*/
GSocketError _GSocket_Output_Timeout(GSocket *socket)
{
fd_set writefds;
if (!socket->m_non_blocking)
{
FD_ZERO(&writefds);
FD_SET(socket->m_fd, &writefds);
if (select(0, NULL, &writefds, NULL, &socket->m_timeout) == 0)
{
socket->m_error = GSOCK_TIMEDOUT;
return GSOCK_TIMEDOUT;
}
}
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_Dgram(GSocket *socket, char *buffer, int size)
{
struct sockaddr from;
SOCKLEN_T fromlen = sizeof(from);
int ret;
GSocketError err;
ret = recvfrom(socket->m_fd, buffer, size, 0, &from, &fromlen);
if (ret == SOCKET_ERROR)
return SOCKET_ERROR;
/* Translate a system address into a GSocket address */
if (!socket->m_peer)
{
socket->m_peer = GAddress_new();
if (!socket->m_peer)
{
socket->m_error = GSOCK_MEMERR;
return -1;
}
}
err = _GAddress_translate_from(socket->m_peer, &from, fromlen);
if (err != GSOCK_NOERROR)
{
GAddress_destroy(socket->m_peer);
socket->m_peer = NULL;
socket->m_error = err;
return -1;
}
return ret;
}
int _GSocket_Send_Stream(GSocket *socket, const char *buffer, int size)
{
return send(socket->m_fd, buffer, size, 0);
}
int _GSocket_Send_Dgram(GSocket *socket, const char *buffer, int size)
{
struct sockaddr *addr;
int len, ret;
GSocketError err;
if (!socket->m_peer)
{
socket->m_error = GSOCK_INVADDR;
return -1;
}
err = _GAddress_translate_to(socket->m_peer, &addr, &len);
if (err != GSOCK_NOERROR)
{
socket->m_error = err;
return -1;
}
ret = sendto(socket->m_fd, buffer, size, 0, addr, len);
/* Frees memory allocated by _GAddress_translate_to */
free(addr);
return ret;
}
/*
* -------------------------------------------------------------------------
* GAddress
* -------------------------------------------------------------------------
*/
/* 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) \
{ \
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(void)
{
GAddress *address;
if ((address = (GAddress *) malloc(sizeof(GAddress))) == NULL)
return NULL;
address->m_family = GSOCK_NOFAMILY;
address->m_addr = NULL;
address->m_len = 0;
return address;
}
GAddress *GAddress_copy(GAddress *address)
{
GAddress *addr2;
assert(address != NULL);
if ((addr2 = (GAddress *) malloc(sizeof(GAddress))) == NULL)
return NULL;
memcpy(addr2, address, sizeof(GAddress));
if (address->m_addr)
{
addr2->m_addr = (struct sockaddr *) malloc(addr2->m_len);
if (addr2->m_addr == NULL)
{
free(addr2);
return NULL;
}
memcpy(addr2->m_addr, address->m_addr, addr2->m_len);
}
return addr2;
}
void GAddress_destroy(GAddress *address)
{
assert(address != NULL);
if (address->m_addr)
free(address->m_addr);
free(address);
}
void GAddress_SetFamily(GAddress *address, GAddressType type)
{
assert(address != NULL);
address->m_family = type;
}
GAddressType GAddress_GetFamily(GAddress *address)
{
assert(address != NULL);
return address->m_family;
}
GSocketError _GAddress_translate_from(GAddress *address,
struct sockaddr *addr, int len)
{
address->m_realfamily = addr->sa_family;
switch (addr->sa_family)
{
case AF_INET:
address->m_family = GSOCK_INET;
break;
case AF_UNIX:
address->m_family = GSOCK_UNIX;
break;
#ifdef AF_INET6
case AF_INET6:
address->m_family = GSOCK_INET6;
break;
#endif
default:
{
address->m_error = GSOCK_INVOP;
return GSOCK_INVOP;
}
}
if (address->m_addr)
free(address->m_addr);
address->m_len = len;
address->m_addr = (struct sockaddr *) malloc(len);
if (address->m_addr == NULL)
{
address->m_error = GSOCK_MEMERR;
return GSOCK_MEMERR;
}
memcpy(address->m_addr, addr, len);
return GSOCK_NOERROR;
}
GSocketError _GAddress_translate_to(GAddress *address,
struct sockaddr **addr, int *len)
{
if (!address->m_addr)
{
address->m_error = GSOCK_INVADDR;
return GSOCK_INVADDR;
}
*len = address->m_len;
*addr = (struct sockaddr *) malloc(address->m_len);
if (*addr == NULL)
{
address->m_error = GSOCK_MEMERR;
return GSOCK_MEMERR;
}
memcpy(*addr, address->m_addr, address->m_len);
return GSOCK_NOERROR;
}
/*
* -------------------------------------------------------------------------
* Internet address family
* -------------------------------------------------------------------------
*/
GSocketError _GAddress_Init_INET(GAddress *address)
{
address->m_len = sizeof(struct sockaddr_in);
address->m_addr = (struct sockaddr *) malloc(address->m_len);
if (address->m_addr == NULL)
{
address->m_error = GSOCK_MEMERR;
return GSOCK_MEMERR;
}
address->m_family = GSOCK_INET;
address->m_realfamily = AF_INET;
((struct sockaddr_in *)address->m_addr)->sin_family = AF_INET;
((struct sockaddr_in *)address->m_addr)->sin_addr.s_addr = INADDR_ANY;
return GSOCK_NOERROR;
}
GSocketError GAddress_INET_SetHostName(GAddress *address, const char *hostname)
{
struct hostent *he;
struct in_addr *addr;
assert(address != NULL);
CHECK_ADDRESS(address, INET);
addr = &(((struct sockaddr_in *)address->m_addr)->sin_addr);
addr->s_addr = inet_addr(hostname);
/* If it is a numeric host name, convert it now */
if (addr->s_addr == INADDR_NONE)
{
struct in_addr *array_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;
}
array_addr = (struct in_addr *) *(he->h_addr_list);
addr->s_addr = array_addr[0].s_addr;
}
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)
{
struct in_addr *addr;
assert(address != NULL);
CHECK_ADDRESS(address, INET);
addr = &(((struct sockaddr_in *)address->m_addr)->sin_addr);
addr->s_addr = htonl(hostaddr);;
return GSOCK_NOERROR;
}
GSocketError GAddress_INET_SetPortName(GAddress *address, const char *port,
const char *protocol)
{
struct servent *se;
struct sockaddr_in *addr;
assert(address != NULL);
CHECK_ADDRESS(address, INET);
if (!port)
{
address->m_error = GSOCK_INVPORT;
return GSOCK_INVPORT;
}
se = getservbyname(port, protocol);
if (!se)
{
if (isdigit(port[0]))
{
int port_int;
port_int = atoi(port);
addr = (struct sockaddr_in *)address->m_addr;
addr->sin_port = htons((u_short) port_int);
return GSOCK_NOERROR;
}
address->m_error = GSOCK_INVPORT;
return GSOCK_INVPORT;
}
addr = (struct sockaddr_in *)address->m_addr;
addr->sin_port = se->s_port;
return GSOCK_NOERROR;
}
GSocketError GAddress_INET_SetPort(GAddress *address, unsigned short port)
{
struct sockaddr_in *addr;
assert(address != NULL);
CHECK_ADDRESS(address, INET);
addr = (struct sockaddr_in *)address->m_addr;
addr->sin_port = htons(port);
return GSOCK_NOERROR;
}
GSocketError GAddress_INET_GetHostName(GAddress *address, char *hostname, size_t sbuf)
{
struct hostent *he;
char *addr_buf;
struct sockaddr_in *addr;
assert(address != NULL);
CHECK_ADDRESS(address, INET);
addr = (struct sockaddr_in *)address->m_addr;
addr_buf = (char *)&(addr->sin_addr);
he = gethostbyaddr(addr_buf, sizeof(addr->sin_addr), AF_INET);
if (he == NULL)
{
address->m_error = GSOCK_NOHOST;
return GSOCK_NOHOST;
}
strncpy(hostname, he->h_name, sbuf);
return GSOCK_NOERROR;
}
unsigned long GAddress_INET_GetHostAddress(GAddress *address)
{
struct sockaddr_in *addr;
assert(address != NULL);
CHECK_ADDRESS_RETVAL(address, INET, 0);
addr = (struct sockaddr_in *)address->m_addr;
return ntohl(addr->sin_addr.s_addr);
}
unsigned short GAddress_INET_GetPort(GAddress *address)
{
struct sockaddr_in *addr;
assert(address != NULL);
CHECK_ADDRESS_RETVAL(address, INET, 0);
addr = (struct sockaddr_in *)address->m_addr;
return ntohs(addr->sin_port);
}
/*
* -------------------------------------------------------------------------
* Unix address family
* -------------------------------------------------------------------------
*/
GSocketError _GAddress_Init_UNIX(GAddress *address)
{
assert (address != NULL);
address->m_error = GSOCK_INVADDR;
return GSOCK_INVADDR;
}
GSocketError GAddress_UNIX_SetPath(GAddress *address, const char *path)
{
#if defined(__BORLANDC__)
/* prevents unused variable message in Borland */
(void)path;
#endif
assert (address != NULL);
address->m_error = GSOCK_INVADDR;
return GSOCK_INVADDR;
}
GSocketError GAddress_UNIX_GetPath(GAddress *address, char *path, size_t sbuf)
{
#if defined(__BORLANDC__)
/* prevents unused variable message in Borland */
(void)path;
(void)sbuf;
#endif
assert (address != NULL);
address->m_error = GSOCK_INVADDR;
return GSOCK_INVADDR;
}
#else /* !wxUSE_SOCKETS */
/*
* Translation unit shouldn't be empty, so include this typedef to make the
* compiler (VC++ 6.0, for example) happy
*/
typedef void (*wxDummy)();
#endif /* wxUSE_SOCKETS || defined(__GSOCKET_STANDALONE__) */
Reference in New Issue View Git Blame Copy Permalink