/* -------------------------------------------------------------------------
* Project: GSocket (Generic Socket) for WX
* Name: gsocket.c
+ * Authors: Guilhem Lavaux,
+ * Guillermo Rodriguez Garcia <guille@iies.es> (maintainer)
* Purpose: GSocket main Unix file
* CVSID: $Id$
* -------------------------------------------------------------------------
*/
+/*
+ * PLEASE don't put C++ comments here - this is a C source file.
+ */
+
+#ifndef __GSOCKET_STANDALONE__
#include "wx/setup.h"
+#endif
-#if wxUSE_SOCKETS
+#if wxUSE_SOCKETS || defined(__GSOCKET_STANDALONE__)
#include <assert.h>
#include <sys/types.h>
#include <netdb.h>
#include <sys/ioctl.h>
+
#ifdef __VMS__
#include <socket.h>
-struct sockaddr_un {
- u_char sun_len; /* sockaddr len including null */
- u_char sun_family; /* AF_UNIX */
- char sun_path[108]; /* path name (gag) */
+struct sockaddr_un
+{
+ u_char sun_len; /* sockaddr len including null */
+ u_char sun_family; /* AF_UNIX */
+ char sun_path[108]; /* path name (gag) */
};
#else
#include <sys/socket.h>
#include <sys/un.h>
#endif
+
#include <sys/time.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <errno.h>
-
#include <string.h>
#include <unistd.h>
#include <stdio.h>
#include <stdlib.h>
#include <stddef.h>
#include <ctype.h>
-
#ifdef sun
-# include <sys/filio.h>
+# include <sys/filio.h>
#endif
-
#ifdef sgi
-# include <bstring.h>
+# include <bstring.h>
#endif
-
#include <signal.h>
-#include "wx/gsocket.h"
-#include "wx/unix/gsockunx.h"
-
#ifndef SOCKLEN_T
#ifdef VMS
#else
# ifdef __GLIBC__
# if __GLIBC__ == 2
-# define SOCKLEN_T socklen_t
+# define SOCKLEN_T socklen_t
# endif
# else
# define SOCKLEN_T int
#endif /* SOCKLEN_T */
+/*
+ * MSW defines this, Unices don't.
+ */
+#ifndef INVALID_SOCKET
+#define INVALID_SOCKET -1
+#endif
+
+/*
+ * INADDR_BROADCAST is identical to INADDR_NONE which is not defined
+ * on all systems. INADDR_BROADCAST should be fine to indicate an error.
+ */
+#ifndef INADDR_NONE
+#define INADDR_NONE INADDR_BROADCAST
+#endif
+
#define MASK_SIGNAL() \
{ \
void (*old_handler)(int); \
}
+#ifndef __GSOCKET_STANDALONE__
+# include "wx/unix/gsockunx.h"
+# include "wx/gsocket.h"
+#else
+# include "gsockunx.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)
+# define _GSocket_Install_Callback(socket, event)
+# define _GSocket_Uninstall_Callback(socket, event)
+#endif /* wxUSE_GUI */
+
+/* debugging helpers */
+#ifdef __GSOCKET_DEBUG__
+# define GSocket_Debug(args) printf args
+#else
+# define GSocket_Debug(args)
+#endif /* __GSOCKET_DEBUG__ */
+
/* Global initialisers */
-bool GSocket_Init()
+int GSocket_Init(void)
{
- return TRUE;
+ return 1;
}
-void GSocket_Cleanup()
+void GSocket_Cleanup(void)
{
}
-/* Constructors / Destructors */
+/* Constructors / Destructors for GSocket */
-GSocket *GSocket_new()
+GSocket *GSocket_new(void)
{
- int i;
+ int i, success;
GSocket *socket;
socket = (GSocket *)malloc(sizeof(GSocket));
if (socket == NULL)
return NULL;
- socket->m_fd = -1;
+ socket->m_fd = INVALID_SOCKET;
for (i=0;i<GSOCK_MAX_EVENT;i++)
{
socket->m_cbacks[i] = NULL;
/* 10 minutes * 60 sec * 1000 millisec */
socket->m_establishing = FALSE;
- /* We initialize the GUI specific entries here */
- _GSocket_GUI_Init(socket);
+ /* Per-socket GUI-specific initialization */
+ success = _GSocket_GUI_Init(socket);
+ if (!success)
+ {
+ free(socket);
+ return NULL;
+ }
return socket;
}
+void GSocket_close(GSocket *socket)
+{
+ _GSocket_Disable_Events(socket);
+ close(socket->m_fd);
+ socket->m_fd = INVALID_SOCKET;
+}
+
void GSocket_destroy(GSocket *socket)
{
assert(socket != NULL);
- /* First, we check that the socket is really shutdowned */
- if (socket->m_fd != -1)
+ /* Check that the socket is really shutdowned */
+ if (socket->m_fd != INVALID_SOCKET)
GSocket_Shutdown(socket);
- /* We destroy GUI specific variables */
+ /* Per-socket GUI-specific cleanup */
_GSocket_GUI_Destroy(socket);
- /* We destroy private addresses */
+ /* Destroy private addresses */
if (socket->m_local)
GAddress_destroy(socket->m_local);
if (socket->m_peer)
GAddress_destroy(socket->m_peer);
- /* We 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;
assert(socket != NULL);
- /* If socket has been created, we shutdown it */
- if (socket->m_fd != -1)
+ /* If socket has been created, shutdown it */
+ if (socket->m_fd != INVALID_SOCKET)
{
shutdown(socket->m_fd, 2);
- close(socket->m_fd);
- socket->m_fd = -1;
+ GSocket_close(socket);
}
- /* We also disable GUI callbacks */
+ /* Disable GUI callbacks */
for (evt = 0; evt < GSOCK_MAX_EVENT; evt++)
socket->m_cbacks[evt] = NULL;
- socket->m_detected = 0;
- _GSocket_Disable_Events(socket);
+ 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);
- if ((socket->m_fd != -1 && !socket->m_server)) {
+ /* 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 (address == NULL || address->m_family == GSOCK_NOFAMILY) {
+ /* check address */
+ if (address == NULL || address->m_family == GSOCK_NOFAMILY)
+ {
socket->m_error = GSOCK_INVADDR;
return GSOCK_INVADDR;
}
{
assert(socket != NULL);
- if (address == NULL || address->m_family == GSOCK_NOFAMILY) {
+ /* check address */
+ if (address == NULL || address->m_family == GSOCK_NOFAMILY)
+ {
socket->m_error = GSOCK_INVADDR;
return GSOCK_INVADDR;
}
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_fd == -1) {
+ /* 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, (SOCKLEN_T *) &size) < 0) {
+ if (getsockname(socket->m_fd, &addr, (SOCKLEN_T *) &size) < 0)
+ {
socket->m_error = GSOCK_IOERR;
return NULL;
}
+ /* got a valid address from getsockname, create a GAddress object */
address = GAddress_new();
- if (address == NULL) {
+ if (address == NULL)
+ {
socket->m_error = GSOCK_MEMERR;
return NULL;
}
- err = _GAddress_translate_from(address, &addr, size); /*xxx*/
- if (err != GSOCK_NOERROR) {
+
+ err = _GAddress_translate_from(address, &addr, size);
+ if (err != GSOCK_NOERROR)
+ {
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)
{
- int type;
int arg = 1;
assert(sck != NULL);
- if (sck->m_fd != -1) {
+ /* must not be in use */
+ if (sck->m_fd != INVALID_SOCKET)
+ {
sck->m_error = GSOCK_INVSOCK;
return GSOCK_INVSOCK;
}
- if (!sck->m_local) {
+ /* the local addr must have been set */
+ if (!sck->m_local)
+ {
sck->m_error = GSOCK_INVADDR;
return GSOCK_INVADDR;
}
- /* We always have a stream here */
- sck->m_stream = TRUE;
- sck->m_server = TRUE;
+ /* Initialize all fields */
+ sck->m_stream = TRUE;
+ sck->m_server = TRUE;
+ sck->m_oriented = TRUE;
/* Create the socket */
sck->m_fd = socket(sck->m_local->m_realfamily, SOCK_STREAM, 0);
- if (sck->m_fd == -1) {
+ if (sck->m_fd == INVALID_SOCKET)
+ {
sck->m_error = GSOCK_IOERR;
return GSOCK_IOERR;
}
ioctl(sck->m_fd, FIONBIO, &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) {
- close(sck->m_fd);
- sck->m_fd = -1;
- sck->m_error = GSOCK_IOERR;
- return GSOCK_IOERR;
- }
-
- /* Enable listening up to 5 connections */
- if (listen(sck->m_fd, 5) < 0) {
- close(sck->m_fd);
- sck->m_fd = -1;
+ /* 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;
}
}
/* 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 *socket)
{
_GSocket_Enable(socket, GSOCK_CONNECTION);
/* If the socket has already been created, we exit immediately */
- if (socket->m_fd == -1 || !socket->m_server)
+ if (socket->m_fd == INVALID_SOCKET || !socket->m_server)
{
socket->m_error = GSOCK_INVSOCK;
return NULL;
/* Create a GSocket object for the new connection */
connection = GSocket_new();
+
if (!connection)
{
socket->m_error = GSOCK_MEMERR;
return NULL;
}
- /* Accept the incoming connection */
+ /* Wait for a connection (with timeout) */
if (_GSocket_Input_Timeout(socket) == GSOCK_TIMEDOUT)
{
GSocket_destroy(connection);
connection->m_fd = accept(socket->m_fd, &from, (SOCKLEN_T *) &fromlen);
- if (connection->m_fd == -1)
+ if (connection->m_fd == INVALID_SOCKET)
{
if (errno == EWOULDBLOCK)
socket->m_error = GSOCK_WOULDBLOCK;
connection->m_stream = TRUE;
connection->m_oriented = TRUE;
- /* Setup the peer address field */ /*xxx*/
+ /* Setup the peer address field */
connection->m_peer = GAddress_new();
if (!connection->m_peer)
{
return connection;
}
-/* Non oriented connections */
-
-GSocketError GSocket_SetNonOriented(GSocket *sck)
-{
- int arg = 1;
-
- assert(sck != NULL);
-
- if (sck->m_fd != -1) {
- sck->m_error = GSOCK_INVSOCK;
- return GSOCK_INVSOCK;
- }
-
- if (!sck->m_local) {
- sck->m_error = GSOCK_INVADDR;
- return GSOCK_INVADDR;
- }
-
- 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 < 0) {
- sck->m_error = GSOCK_IOERR;
- return GSOCK_IOERR;
- }
-
- ioctl(sck->m_fd, FIONBIO, &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) {
- close(sck->m_fd);
- sck->m_fd = -1;
- sck->m_error = GSOCK_IOERR;
- return GSOCK_IOERR;
- }
-
- return GSOCK_NOERROR;
-}
-
/* 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 type, err, ret;
+ int err, ret;
int arg = 1;
assert(sck != NULL);
/* Enable CONNECTION events (needed for nonblocking connections) */
_GSocket_Enable(sck, GSOCK_CONNECTION);
- if (sck->m_fd != -1)
+ if (sck->m_fd != INVALID_SOCKET)
{
sck->m_error = GSOCK_INVSOCK;
return GSOCK_INVSOCK;
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_establishing = FALSE;
- if (sck->m_stream)
- type = SOCK_STREAM;
- else
- type = SOCK_DGRAM;
-
/* 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 == -1) {
+ if (sck->m_fd == INVALID_SOCKET)
+ {
sck->m_error = GSOCK_IOERR;
return GSOCK_IOERR;
}
ioctl(sck->m_fd, FIONBIO, &arg);
_GSocket_Enable_Events(sck);
- /* Connect it to the PEER address */
+ /* 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 == -1)
{
if (_GSocket_Output_Timeout(sck) == GSOCK_TIMEDOUT)
{
- close(sck->m_fd);
- sck->m_fd = -1;
+ GSocket_close(sck);
/* sck->m_error is set in _GSocket_Output_Timeout */
return GSOCK_TIMEDOUT;
}
else
{
- return GSOCK_NOERROR;
+ int error;
+ SOCKLEN_T len = sizeof(error);
+
+ getsockopt(sck->m_fd, SOL_SOCKET, SO_ERROR, (void*) &error, &len);
+
+ if (!error)
+ return GSOCK_NOERROR;
}
}
*/
if ((err == EINPROGRESS) && (sck->m_non_blocking))
{
- sck->m_error = GSOCK_WOULDBLOCK;
sck->m_establishing = TRUE;
-
+ sck->m_error = GSOCK_WOULDBLOCK;
return GSOCK_WOULDBLOCK;
}
/* If connect failed with an error other than EINPROGRESS,
* then the call to GSocket_Connect has failed.
*/
- close(sck->m_fd);
- sck->m_fd = -1;
+ 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)
+{
+ int 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;
+ }
+ ioctl(sck->m_fd, FIONBIO, &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;
}
/* Reenable INPUT events */
_GSocket_Enable(socket, GSOCK_INPUT);
- if (socket->m_fd == -1 || socket->m_server)
+ 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
return ret;
}
-int GSocket_Write(GSocket *socket, const char *buffer,
- int size)
-{
+int GSocket_Write(GSocket *socket, const char *buffer, int size)
+{
int ret;
assert(socket != NULL);
+
+ GSocket_Debug(( "GSocket_Write #1, size %d\n", size ));
- if (socket->m_fd == -1 || socket->m_server)
+ if (socket->m_fd == INVALID_SOCKET || socket->m_server)
{
socket->m_error = GSOCK_INVSOCK;
return -1;
}
+ GSocket_Debug(( "GSocket_Write #2, size %d\n", size ));
+
+ /* If the socket is blocking, wait for writability (with a timeout) */
if (_GSocket_Output_Timeout(socket) == GSOCK_TIMEDOUT)
return -1;
+ GSocket_Debug(( "GSocket_Write #3, size %d\n", size ));
+
+ /* Write the data */
if (socket->m_stream)
ret = _GSocket_Send_Stream(socket, buffer, size);
else
ret = _GSocket_Send_Dgram(socket, buffer, size);
+ GSocket_Debug(( "GSocket_Write #4, size %d\n", size ));
+
if (ret == -1)
{
if (errno == EWOULDBLOCK)
+ {
socket->m_error = GSOCK_WOULDBLOCK;
+ GSocket_Debug(( "GSocket_Write error WOULDBLOCK\n" ));
+ }
else
+ {
socket->m_error = GSOCK_IOERR;
+ GSocket_Debug(( "GSocket_Write error IOERR\n" ));
+ }
/* Only reenable OUTPUT events after an error (just like WSAAsyncSelect
* in MSW). Once the first OUTPUT event is received, users can assume
* will further OUTPUT events be posted.
*/
_GSocket_Enable(socket, GSOCK_OUTPUT);
+ return -1;
}
+ GSocket_Debug(( "GSocket_Write #5, size %d ret %d\n", size, ret ));
+
return ret;
}
* 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;
+ struct timeval tv;
+
+ /* Do not use a static struct, Linux can garble it */
+ tv.tv_sec = 0;
+ tv.tv_usec = 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))
+ {
+ char c;
+
+ if (recv(socket->m_fd, &c, 1, MSG_PEEK) > 0)
+ {
+ result |= (GSOCK_INPUT_FLAG & flags);
+ }
+ else
+ {
+ if (socket->m_server && socket->m_stream)
+ {
+ result |= (GSOCK_CONNECTION_FLAG & flags);
+ socket->m_detected |= GSOCK_CONNECTION_FLAG;
+ }
+ else
+ {
+ result |= (GSOCK_LOST_FLAG & flags);
+ socket->m_detected = GSOCK_LOST_FLAG;
+ }
+ }
+ }
+
+ /* 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, (void*)&error, &len);
+
+ if (error)
+ {
+ result |= (GSOCK_LOST_FLAG & flags);
+ socket->m_detected = GSOCK_LOST_FLAG;
+ }
+ else
+ {
+ result |= (GSOCK_CONNECTION_FLAG & flags);
+ socket->m_detected |= GSOCK_CONNECTION_FLAG;
+ }
+ }
+ else
+ {
+ result |= (GSOCK_OUTPUT_FLAG & flags);
+ }
+ }
+
+ /* Check for exceptions and errors (is this useful in Unices?) */
+ 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 */
/* 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_Debug( ("GSocket_SetNonBlocking: %d\n", (int)non_block) );
+
socket->m_non_blocking = non_block;
}
/* 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 millisec)
{
}
/* 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:
* void function(GSocket *socket, GSocketEvent event, char *cdata)
*/
void GSocket_SetCallback(GSocket *socket, GSocketEventFlags flags,
- GSocketCallback callback, char *cdata)
+ GSocketCallback callback, char *cdata)
{
int count;
}
}
+
#define CALL_CALLBACK(socket, event) { \
_GSocket_Disable(socket, event); \
if (socket->m_cbacks[event]) \
{
struct timeval tv;
fd_set readfds;
+ int ret;
/* Linux select() will overwrite the struct on return */
tv.tv_sec = (socket->m_timeout / 1000);
{
FD_ZERO(&readfds);
FD_SET(socket->m_fd, &readfds);
- if (select(socket->m_fd + 1, &readfds, NULL, NULL, &tv) == 0)
+ ret = select(socket->m_fd + 1, &readfds, NULL, NULL, &tv);
+ if (ret == 0)
{
+ GSocket_Debug(( "GSocket_Input_Timeout, select returned 0\n" ));
+ socket->m_error = GSOCK_TIMEDOUT;
+ return GSOCK_TIMEDOUT;
+ }
+ if (ret == -1)
+ {
+ GSocket_Debug(( "GSocket_Input_Timeout, select returned -1\n" ));
+ if (errno == EBADF) { GSocket_Debug(( "Invalid file descriptor\n" )); }
+ if (errno == EINTR) { GSocket_Debug(( "A non blocked signal was caught\n" )); }
+ if (errno == EINVAL) { GSocket_Debug(( "The highest number descriptor is negative\n" )); }
+ if (errno == ENOMEM) { GSocket_Debug(( "Not enough memory\n" )); }
socket->m_error = GSOCK_TIMEDOUT;
return GSOCK_TIMEDOUT;
}
{
struct timeval tv;
fd_set writefds;
+ int ret;
/* Linux select() will overwrite the struct on return */
tv.tv_sec = (socket->m_timeout / 1000);
tv.tv_usec = (socket->m_timeout % 1000) * 1000;
+ GSocket_Debug( ("m_non_blocking has: %d\n", (int)socket->m_non_blocking) );
+
if (!socket->m_non_blocking)
{
FD_ZERO(&writefds);
FD_SET(socket->m_fd, &writefds);
- if (select(socket->m_fd + 1, NULL, &writefds, NULL, &tv) == 0)
+ ret = select(socket->m_fd + 1, NULL, &writefds, NULL, &tv);
+ if (ret == 0)
{
+ GSocket_Debug(( "GSocket_Output_Timeout, select returned 0\n" ));
socket->m_error = GSOCK_TIMEDOUT;
return GSOCK_TIMEDOUT;
}
+ if (ret == -1)
+ {
+ GSocket_Debug(( "GSocket_Output_Timeout, select returned -1\n" ));
+ if (errno == EBADF) { GSocket_Debug(( "Invalid file descriptor\n" )); }
+ if (errno == EINTR) { GSocket_Debug(( "A non blocked signal was caught\n" )); }
+ if (errno == EINVAL) { GSocket_Debug(( "The highest number descriptor is negative\n" )); }
+ if (errno == ENOMEM) { GSocket_Debug(( "Not enough memory\n" )); }
+ socket->m_error = GSOCK_TIMEDOUT;
+ return GSOCK_TIMEDOUT;
+ }
+ if ( ! FD_ISSET(socket->m_fd, &writefds) ) {
+ GSocket_Debug(( "GSocket_Output_Timeout is buggy!\n" ));
+ }
+ else {
+ GSocket_Debug(( "GSocket_Output_Timeout seems correct\n" ));
+ }
+ }
+ else
+ {
+ GSocket_Debug(( "GSocket_Output_Timeout, didn't try select!\n" ));
}
+
return GSOCK_NOERROR;
}
int _GSocket_Recv_Stream(GSocket *socket, char *buffer, int size)
{
- int ret;
-
- MASK_SIGNAL();
- ret = recv(socket->m_fd, buffer, size, 0);
- UNMASK_SIGNAL();
-
- return ret;
+ return recv(socket->m_fd, buffer, size, 0);
}
int _GSocket_Recv_Dgram(GSocket *socket, char *buffer, int size)
fromlen = sizeof(from);
- MASK_SIGNAL();
ret = recvfrom(socket->m_fd, buffer, size, 0, &from, (SOCKLEN_T *) &fromlen);
- UNMASK_SIGNAL();
if (ret == -1)
return -1;
int len, ret;
GSocketError err;
- if (!socket->m_peer) {
+ if (!socket->m_peer)
+ {
socket->m_error = GSOCK_INVADDR;
return -1;
}
err = _GAddress_translate_to(socket->m_peer, &addr, &len);
- if (err != GSOCK_NOERROR) {
+ if (err != GSOCK_NOERROR)
+ {
socket->m_error = err;
return -1;
}
void _GSocket_Detected_Read(GSocket *socket)
{
char c;
- int ret;
- if (socket->m_stream)
+ if (recv(socket->m_fd, &c, 1, MSG_PEEK) > 0)
{
- ret = recv(socket->m_fd, &c, 1, MSG_PEEK);
-
- if (ret < 0 && socket->m_server)
+ CALL_CALLBACK(socket, GSOCK_INPUT);
+ }
+ else
+ {
+ if (socket->m_server && socket->m_stream)
{
CALL_CALLBACK(socket, GSOCK_CONNECTION);
- return;
- }
-
- if (ret > 0)
- {
- CALL_CALLBACK(socket, GSOCK_INPUT);
}
else
{
{
if (socket->m_establishing && !socket->m_server)
{
- int error, len;
+ int error;
+ SOCKLEN_T len = sizeof(error);
socket->m_establishing = FALSE;
- len = sizeof(error);
- getsockopt(socket->m_fd, SOL_SOCKET, SO_ERROR, (void*) &error,
- (SOCKLEN_T *) &len);
+ getsockopt(socket->m_fd, SOL_SOCKET, SO_ERROR, (void*)&error, &len);
if (error)
{
* -------------------------------------------------------------------------
*/
-/* CHECK_ADDRESS verifies that the current family is either GSOCK_NOFAMILY or
- * GSOCK_*family*. In case it is GSOCK_NOFAMILY, it initializes 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) \
-{ \
- 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 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;
- address = (GAddress *)malloc(sizeof(GAddress));
-
- if (address == NULL)
+ if ((address = (GAddress *) malloc(sizeof(GAddress))) == NULL)
return NULL;
address->m_family = GSOCK_NOFAMILY;
assert(address != NULL);
- addr2 = (GAddress *)malloc(sizeof(GAddress));
-
- if (addr2 == NULL)
+ if ((addr2 = (GAddress *) malloc(sizeof(GAddress))) == NULL)
return NULL;
memcpy(addr2, address, sizeof(GAddress));
- if (address->m_addr) {
+ if (address->m_addr && address->m_len > 0)
+ {
addr2->m_addr = (struct sockaddr *)malloc(addr2->m_len);
- if (addr2->m_addr == NULL) {
+ if (addr2->m_addr == NULL)
+ {
free(addr2);
return NULL;
}
{
assert(address != NULL);
+ if (address->m_addr)
+ free(address->m_addr);
+
free(address);
}
return address->m_family;
}
-GSocketError _GAddress_translate_from(GAddress *address, struct sockaddr *addr, int len){
+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;
+ 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;
+ case AF_INET6:
+ address->m_family = GSOCK_INET6;
+ break;
#endif
- default:
+ default:
{
- address->m_error = GSOCK_INVOP;
- return GSOCK_INVOP;
+ address->m_error = GSOCK_INVOP;
+ return GSOCK_INVOP;
}
}
address->m_len = len;
address->m_addr = (struct sockaddr *)malloc(len);
- if (address->m_addr == NULL) {
+
+ if (address->m_addr == NULL)
+ {
address->m_error = GSOCK_MEMERR;
return GSOCK_MEMERR;
}
GSocketError _GAddress_translate_to(GAddress *address,
struct sockaddr **addr, int *len)
{
- if (!address->m_addr) {
+ 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) {
+ if (*addr == NULL)
+ {
address->m_error = GSOCK_MEMERR;
return GSOCK_MEMERR;
}
GSocketError _GAddress_Init_INET(GAddress *address)
{
address->m_len = sizeof(struct sockaddr_in);
- address->m_addr = (struct sockaddr *)malloc(address->m_len);
+ address->m_addr = (struct sockaddr *) malloc(address->m_len);
if (address->m_addr == NULL)
{
address->m_error = GSOCK_MEMERR;
address->m_family = GSOCK_INET;
address->m_realfamily = PF_INET;
((struct sockaddr_in *)address->m_addr)->sin_family = AF_INET;
- /*
- INADDR_BROADCAST is identical to INADDR_NONE which is not defined
- on all unices. INADDR_BROADCAST should be fine to indicate an error.
- */
- ((struct sockaddr_in *)address->m_addr)->sin_addr.s_addr = INADDR_BROADCAST;
+ ((struct sockaddr_in *)address->m_addr)->sin_addr.s_addr = INADDR_ANY;
return GSOCK_NOERROR;
}
assert(address != NULL);
- CHECK_ADDRESS(address, INET, GSOCK_INVADDR);
+ CHECK_ADDRESS(address, INET);
addr = &(((struct sockaddr_in *)address->m_addr)->sin_addr);
if (inet_aton(hostname, addr) == 0)
{
#elif defined(HAVE_INET_ADDR)
- /* Fix from Guillermo Rodriguez Garcia <guille@iies.es> */
if ( (addr->s_addr = inet_addr(hostname)) == -1 )
{
#else
/* It is a real name, we solve it */
if ((he = gethostbyname(hostname)) == NULL)
{
+ /* Reset to invalid address */
+ addr->s_addr = INADDR_NONE;
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)
{
}
se = getservbyname(port, protocol);
- if (!se) {
- if (isdigit(port[0]))
+ if (!se)
+ {
+ /* the cast to int suppresses compiler warnings about subscript having the
+ type char */
+ if (isdigit((int)port[0]))
{
int port_int;
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);
((struct sockaddr_un *)address->m_addr)->sun_family = AF_UNIX;
((struct sockaddr_un *)address->m_addr)->sun_path[0] = 0;
- return TRUE;
+ return GSOCK_NOERROR;
}
+#define UNIX_SOCK_PATHLEN (sizeof(addr->sun_path)/sizeof(addr->sun_path[0]))
+
GSocketError GAddress_UNIX_SetPath(GAddress *address, const char *path)
{
struct sockaddr_un *addr;
assert(address != NULL);
- CHECK_ADDRESS(address, UNIX, GSOCK_INVADDR);
+ CHECK_ADDRESS(address, UNIX);
addr = ((struct sockaddr_un *)address->m_addr);
- memcpy(addr->sun_path, path, strlen(path));
+ strncpy(addr->sun_path, path, UNIX_SOCK_PATHLEN);
+ addr->sun_path[UNIX_SOCK_PATHLEN - 1] = '\0';
return GSOCK_NOERROR;
}
struct sockaddr_un *addr;
assert(address != NULL);
- CHECK_ADDRESS(address, UNIX, GSOCK_INVADDR);
+ CHECK_ADDRESS(address, UNIX);
addr = (struct sockaddr_un *)address->m_addr;
return GSOCK_NOERROR;
}
-#endif
- /* wxUSE_SOCKETS */
+#endif /* wxUSE_SOCKETS || defined(__GSOCKET_STANDALONE__) */
+
+/* vi:sts=4:sw=4:et */
projects / wxWidgets.git / blobdiff