/* -------------------------------------------------------------------------
* 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/ioctl.h>
#include <sys/types.h>
-#ifdef vms
+#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) */
+};
#else
#include <sys/socket.h>
-#endif
#include <sys/un.h>
+#endif
+
#include <sys/time.h>
#include <netinet/in.h>
#include <arpa/inet.h>
-#include <netdb.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 "gsockunx.h"
#ifndef SOCKLEN_T
-#ifdef __GLIBC__
-# if __GLIBC__ == 2
-# define SOCKLEN_T socklen_t
-# endif
+#ifdef VMS
+# define SOCKLEN_T unsigned int
#else
-# define SOCKLEN_T int
+# ifdef __GLIBC__
+# if __GLIBC__ == 2
+# define SOCKLEN_T socklen_t
+# endif
+# else
+# define SOCKLEN_T int
+# endif
#endif
+#endif /* SOCKLEN_T */
+
+
+/*
+ * INADDR_BROADCAST is identical to INADDR_NONE which is not defined
+ * on all unices. 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); \
+ \
+ old_handler = signal(SIGPIPE, SIG_IGN);
+
+#define UNMASK_SIGNAL() \
+ signal(SIGPIPE, old_handler); \
+}
+
+
+#ifndef __GSOCKET_STANDALONE__
+
+#include "wx/gsocket.h"
+#include "wx/unix/gsockunx.h"
+
+#else
+
+#include "gsocket.h"
+#include "gsockunx.h"
+
+#endif /* __GSOCKET_STANDALONE__ */
+
+
/* Global initialisers */
bool GSocket_Init()
{
}
-/* Constructors / Destructors */
+/* Constructors / Destructors for GSocket */
GSocket *GSocket_new()
{
socket = (GSocket *)malloc(sizeof(GSocket));
+ if (socket == NULL)
+ return NULL;
+
socket->m_fd = -1;
- for (i=0;i<GSOCK_MAX_EVENT;i++) {
- socket->m_fbacks[i] = NULL;
- socket->m_iocalls[i] = FALSE;
+ 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_gui_dependent = NULL;
- socket->m_blocking = FALSE;
+ socket->m_server = FALSE;
+ socket->m_stream = TRUE;
+ socket->m_gui_dependent = NULL;
+ socket->m_non_blocking = FALSE;
socket->m_timeout = 10*60*1000;
- // 10 minutes * 60 sec * 1000 millisec
+ /* 10 minutes * 60 sec * 1000 millisec */
+ socket->m_establishing = FALSE;
/* We initialize the GUI specific entries here */
_GSocket_GUI_Init(socket);
{
assert(socket != NULL);
- /* First, we check that the socket is really shutdowned */
+ /* Check that the socket is really shutdowned */
if (socket->m_fd != -1)
GSocket_Shutdown(socket);
/* We destroy GUI specific variables */
_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 != -1)
+ {
shutdown(socket->m_fd, 2);
close(socket->m_fd);
socket->m_fd = -1;
}
- /* We also disable GUI callbacks */
- for (evt=0;evt<GSOCK_MAX_EVENT;evt++)
- _GSocket_Uninstall_Callback(socket, evt);
+ /* Disable GUI callbacks */
+ for (evt = 0; evt < GSOCK_MAX_EVENT; evt++)
+ socket->m_cbacks[evt] = NULL;
+
+ socket->m_detected = 0;
+ _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);
- if ((socket->m_fd != -1 && !socket->m_server)) {
+ /* the socket must be initialized, or it must be a server */
+ if ((socket->m_fd != -1 && !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;
}
{
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);
- if (socket->m_fd == -1) {
+ /* else, if the socket is initialized, try getsockname */
+ if (socket->m_fd == -1)
+ {
socket->m_error = GSOCK_INVSOCK;
return NULL;
}
- size = sizeof(addr);
-
- if (getsockname(socket->m_fd, &addr, &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();
- _GAddress_translate_from(address, &addr, size);
+ if (address == NULL)
+ {
+ socket->m_error = GSOCK_MEMERR;
+ return NULL;
+ }
+
+ err = _GAddress_translate_from(address, &addr, size);
+ if (err != GSOCK_NOERROR)
+ {
+ GAddress_destroy(address);
+ socket->m_error = err;
+ return NULL;
+ }
return address;
}
{
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() setup the socket as a server. It uses the "Local" field
- of GSocket. "Local" must be set by GSocket_SetLocal() before
- GSocket_SetServer() is called. GSOCK_INVSOCK if socket has been initialized.
- In case, you haven't yet defined the local address, it returns GSOCK_INVADDR.
- In the other cases it returns GSOCK_IOERR.
-*/
+/* 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)
{
int type;
+ int arg = 1;
assert(sck != NULL);
- if (sck->m_fd != -1) {
+ /* must not be in use */
+ if (sck->m_fd != -1)
+ {
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;
+ /* 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) {
- sck->m_error = GSOCK_IOERR;
- return GSOCK_IOERR;
- }
-
- /* 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;
+ if (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) {
+ ioctl(sck->m_fd, FIONBIO, &arg);
+ _GSocket_Enable_Events(sck);
+
+ /* 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))
+ {
close(sck->m_fd);
sck->m_fd = -1;
sck->m_error = GSOCK_IOERR;
return GSOCK_IOERR;
}
- GSocket_SetNonBlocking(sck, sck->m_blocking);
- GSocket_SetTimeout(sck, sck->m_timeout);
-
return GSOCK_NOERROR;
}
-/*
- GSocket_WaitConnection() waits for an incoming client connection.
-*/
+/* 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 *socket)
{
+ struct sockaddr from;
+ SOCKLEN_T fromlen = sizeof(from);
GSocket *connection;
+ GSocketError err;
+ int arg = 1;
assert(socket != NULL);
+ /* Reenable CONNECTION events */
+ _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 == -1 || !socket->m_server)
+ {
socket->m_error = GSOCK_INVSOCK;
return NULL;
}
- /* Reenable GSOCK_CONNECTION event */
- _GSocket_Enable(socket, GSOCK_CONNECTION);
-
/* Create a GSocket object for the new connection */
connection = GSocket_new();
- /* Accept the incoming connection */
- connection->m_fd = accept(socket->m_fd, NULL, NULL);
- if (connection->m_fd == -1) {
+ if (!connection)
+ {
+ socket->m_error = GSOCK_MEMERR;
+ return NULL;
+ }
+
+ /* Wait for a connection (with timeout) */
+ if (_GSocket_Input_Timeout(socket) == GSOCK_TIMEDOUT)
+ {
+ GSocket_destroy(connection);
+ /* socket->m_error set by _GSocket_Input_Timeout */
+ return NULL;
+ }
+
+ connection->m_fd = accept(socket->m_fd, &from, (SOCKLEN_T *) &fromlen);
+
+ if (connection->m_fd == -1)
+ {
+ if (errno == EWOULDBLOCK)
+ socket->m_error = GSOCK_WOULDBLOCK;
+ else
+ socket->m_error = GSOCK_IOERR;
+
GSocket_destroy(connection);
- socket->m_error = GSOCK_IOERR;
return NULL;
}
/* Initialize all fields */
- connection->m_stream = TRUE;
connection->m_server = FALSE;
+ connection->m_stream = TRUE;
connection->m_oriented = TRUE;
+ /* Setup the peer address field */
+ connection->m_peer = GAddress_new();
+ if (!connection->m_peer)
+ {
+ GSocket_destroy(connection);
+ socket->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);
+ socket->m_error = err;
+ return NULL;
+ }
+
+ ioctl(connection->m_fd, FIONBIO, &arg);
+ _GSocket_Enable_Events(connection);
+
return connection;
}
-/* Non oriented connections */
-
+/* 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 != -1) {
+ if (sck->m_fd != -1)
+ {
sck->m_error = GSOCK_INVSOCK;
return GSOCK_INVSOCK;
}
- if (!sck->m_local) {
+ 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);
- /* Bind it to the LOCAL address */
- if (bind(sck->m_fd, sck->m_local->m_addr, sck->m_local->m_len) < 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 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))
+ {
close(sck->m_fd);
sck->m_fd = -1;
sck->m_error = GSOCK_IOERR;
return GSOCK_IOERR;
}
- GSocket_SetBlocking(sck, sck->m_blocking);
- GSocket_SetTimeout(sck, sck->m_timeout);
-
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. In the other case, it returns GSOCK_INVADDR.
-*/
+/* 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 type;
+ int err, ret;
+ int arg = 1;
assert(sck != NULL);
- if (sck->m_fd != -1) {
+ /* Enable CONNECTION events (needed for nonblocking connections) */
+ _GSocket_Enable(sck, GSOCK_CONNECTION);
+
+ if (sck->m_fd != -1)
+ {
sck->m_error = GSOCK_INVSOCK;
return GSOCK_INVSOCK;
}
- if (!sck->m_peer) {
+ if (!sck->m_peer)
+ {
sck->m_error = GSOCK_INVADDR;
return GSOCK_INVADDR;
}
- /* Test whether we want the socket to be a stream (e.g. TCP) */
- sck->m_stream = (stream == GSOCK_STREAMED);
+ /* Streamed or dgram socket? */
+ sck->m_stream = (stream == GSOCK_STREAMED);
sck->m_oriented = TRUE;
-
- if (sck->m_stream)
- type = SOCK_STREAM;
- else
- type = SOCK_DGRAM;
+ sck->m_server = FALSE;
+ 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 == -1) {
+ if (sck->m_fd == -1)
+ {
sck->m_error = GSOCK_IOERR;
return GSOCK_IOERR;
}
- /* Connect it to the PEER address */
- if (connect(sck->m_fd, sck->m_peer->m_addr,
- sck->m_peer->m_len) != 0) {
+ ioctl(sck->m_fd, FIONBIO, &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 == -1)
+ {
+ err = errno;
+
+ /* If connect failed with EINPROGRESS 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 == EINPROGRESS) && (!sck->m_non_blocking))
+ {
+ if (_GSocket_Output_Timeout(sck) == GSOCK_TIMEDOUT)
+ {
+ close(sck->m_fd);
+ sck->m_fd = -1;
+ /* sck->m_error is set in _GSocket_Output_Timeout */
+ return GSOCK_TIMEDOUT;
+ }
+ else
+ {
+ int error;
+ SOCKLEN_T len = sizeof(error);
+
+ getsockopt(sck->m_fd, SOL_SOCKET, SO_ERROR, (void*) &error, &len);
+
+ if (!error)
+ return GSOCK_NOERROR;
+ }
+ }
+
+ /* If connect failed with EINPROGRESS 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 == EINPROGRESS) && (sck->m_non_blocking))
+ {
+ 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;
sck->m_error = GSOCK_IOERR;
return GSOCK_IOERR;
}
-
- /* It is not a server */
- sck->m_server = FALSE;
-
- GSocket_SetBlocking(sck, sck->m_blocking);
- GSocket_SetTimeout(sck, sck->m_timeout);
return GSOCK_NOERROR;
}
/* Like recv(), send(), ... */
int GSocket_Read(GSocket *socket, char *buffer, int size)
{
+ int ret;
+
assert(socket != NULL);
- if (socket->m_fd == -1 || socket->m_server) {
+ /* Reenable INPUT events */
+ _GSocket_Enable(socket, GSOCK_INPUT);
+
+ if (socket->m_fd == -1 || socket->m_server)
+ {
socket->m_error = GSOCK_INVSOCK;
return -1;
}
- /* Reenable GSOCK_INPUT event */
- _GSocket_Enable(socket, GSOCK_INPUT);
+ /* 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)
- return _GSocket_Recv_Stream(socket, buffer, size);
+ ret = _GSocket_Recv_Stream(socket, buffer, size);
else
- return _GSocket_Recv_Dgram(socket, buffer, size);
+ ret = _GSocket_Recv_Dgram(socket, buffer, size);
+
+ if (ret == -1)
+ {
+ if (errno == EWOULDBLOCK)
+ socket->m_error = GSOCK_WOULDBLOCK;
+ else
+ socket->m_error = GSOCK_IOERR;
+ }
+
+ 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);
- if (socket->m_fd == -1 || socket->m_server) {
+ if (socket->m_fd == -1 || socket->m_server)
+ {
socket->m_error = GSOCK_INVSOCK;
return -1;
}
- _GSocket_Enable(socket, GSOCK_OUTPUT);
+ /* 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)
- return _GSocket_Send_Stream(socket, buffer, size);
+ ret = _GSocket_Send_Stream(socket, buffer, size);
else
- return _GSocket_Send_Dgram(socket, buffer, size);
+ ret = _GSocket_Send_Dgram(socket, buffer, size);
+
+ if (ret == -1)
+ {
+ if (errno == EWOULDBLOCK)
+ socket->m_error = GSOCK_WOULDBLOCK;
+ else
+ socket->m_error = GSOCK_IOERR;
+
+ /* Only reenable OUTPUT events after an error (just like WSAAsyncSelect
+ * in MSW). 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.
+ */
+ _GSocket_Enable(socket, GSOCK_OUTPUT);
+ return -1;
+ }
+
+ return ret;
}
-bool GSocket_DataAvailable(GSocket *socket)
+/* 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)
{
- fd_set read_set;
- struct timeval tv;
-
assert(socket != NULL);
- if (socket->m_fd == -1 || socket->m_server) {
- socket->m_error = GSOCK_INVSOCK;
- return FALSE;
- }
-
- FD_ZERO(&read_set);
- FD_SET(socket->m_fd, &read_set);
-
- tv.tv_sec = 0;
- tv.tv_usec = 0;
-
- select(socket->m_fd+1, &read_set, NULL, NULL, &tv);
-
- return FD_ISSET(socket->m_fd, &read_set);
+ return (flags & socket->m_detected);
}
/* Flags */
-/*
- GSocket_SetNonBlocking() puts the socket in non-blocking mode. This is useful
- if we don't want to wait.
-*/
-void GSocket_SetNonBlocking(GSocket *socket, bool block)
+/* GSocket_SetNonBlocking:
+ * Sets the socket to non-blocking mode. All IO calls will return
+ * immediately.
+ */
+void GSocket_SetNonBlocking(GSocket *socket, bool non_block)
{
assert(socket != NULL);
- socket->m_blocking = block;
-
- if (socket->m_fd != -1)
- ioctl(socket->m_fd, FIONBIO, &block);
+ socket->m_non_blocking = non_block;
}
-/*
- * GSocket_SetTimeout()
+/* GSocket_SetTimeout:
+ * Sets the timeout for blocking calls. Time is expressed in
+ * milliseconds.
*/
void GSocket_SetTimeout(GSocket *socket, unsigned long millisec)
{
assert(socket != NULL);
socket->m_timeout = millisec;
- if (socket->m_fd != -1) {
- struct timeval tval;
-
- tval.tv_sec = millisec / 1000;
- tval.tv_usec = (millisec % 1000) * 1000;
- setsockopt(socket->m_fd, SOL_SOCKET, SO_SNDTIMEO, &tval, sizeof(tval));
- setsockopt(socket->m_fd, SOL_SOCKET, SO_RCVTIMEO, &tval, sizeof(tval));
- }
}
-/*
- GSocket_GetError() returns the last error occured on the socket stream.
-*/
-
+/* 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);
/* Callbacks */
-/*
- Only one fallback is possible for each event (INPUT, OUTPUT, CONNECTION)
- INPUT: The function is called when there is at least a byte in the
- input buffer
- OUTPUT: The function is called when the system is sure the next write call
- will not block
- CONNECTION: Two cases is possible:
- Client socket -> the connection is established
- Server socket -> a client request a connection
- LOST: the connection is lost
-
- SetCallback accepts a combination of these flags so a same callback can
- receive different events.
-
- 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()
-*/
-void GSocket_SetCallback(GSocket *socket, GSocketEventFlags event,
- GSocketCallback fallback, char *cdata)
+/* 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);
+ assert(socket != NULL);
- for (count=0;count<GSOCK_MAX_EVENT;count++) {
- /* We test each flag and, if it is enabled, we enable the corresponding
- event */
- if ((event & (1 << count)) != 0) {
- socket->m_fbacks[count] = fallback;
+ for (count = 0; count < GSOCK_MAX_EVENT; count++)
+ {
+ if ((flags & (1 << count)) != 0)
+ {
+ socket->m_cbacks[count] = callback;
socket->m_data[count] = cdata;
-
- _GSocket_Install_Callback(socket, count);
- _GSocket_Enable(socket, count);
}
}
}
-/*
- UnsetCallback will disables all fallbacks specified by "event".
- NOTE: event may be a combination of flags
-*/
-void GSocket_UnsetCallback(GSocket *socket, GSocketEventFlags event)
+/* 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 = 0;
+ int count;
assert(socket != NULL);
- for (count=0;count<GSOCK_MAX_EVENT;count++) {
- if ((event & (1 << count)) != 0) {
- _GSocket_Disable(socket, count);
- socket->m_fbacks[count] = NULL;
- _GSocket_Uninstall_Callback(socket, count);
+ for (count = 0; count < GSOCK_MAX_EVENT; count++)
+ {
+ if ((flags & (1 << count)) != 0)
+ {
+ socket->m_cbacks[count] = NULL;
+ socket->m_data[count] = NULL;
}
}
}
-#define CALL_FALLBACK(socket, event) \
-if (socket->m_iocalls[event] && \
- socket->m_fbacks[event]) {\
- _GSocket_Disable(socket, event); \
- socket->m_fbacks[event](socket, event, \
- socket->m_data[event]); \
-}
-
-#define MASK_SIGNAL() \
-{ \
- void (*old_handler)(int); \
-\
- old_handler = signal(SIGPIPE, SIG_IGN);
-#define UNMASK_SIGNAL() \
- signal(SIGPIPE, old_handler); \
+#define CALL_CALLBACK(socket, event) { \
+ _GSocket_Disable(socket, event); \
+ if (socket->m_cbacks[event]) \
+ socket->m_cbacks[event](socket, event, socket->m_data[event]); \
}
+
void _GSocket_Enable(GSocket *socket, GSocketEvent event)
{
- socket->m_iocalls[event] = TRUE;
- if (socket->m_fbacks[event])
- _GSocket_Install_Callback(socket, event);
+ socket->m_detected &= ~(1 << event);
+ _GSocket_Install_Callback(socket, event);
}
void _GSocket_Disable(GSocket *socket, GSocketEvent event)
{
- socket->m_iocalls[event] = FALSE;
- if (socket->m_fbacks[event])
- _GSocket_Uninstall_Callback(socket, event);
+ socket->m_detected |= (1 << event);
+ _GSocket_Uninstall_Callback(socket, event);
+}
+
+/* _GSocket_Input_Timeout:
+ * For blocking sockets, wait until data is available or
+ * until timeout ellapses.
+ */
+GSocketError _GSocket_Input_Timeout(GSocket *socket)
+{
+ struct timeval tv;
+ fd_set readfds;
+
+ /* Linux select() will overwrite the struct on return */
+ tv.tv_sec = (socket->m_timeout / 1000);
+ tv.tv_usec = (socket->m_timeout % 1000) * 1000;
+
+ if (!socket->m_non_blocking)
+ {
+ FD_ZERO(&readfds);
+ FD_SET(socket->m_fd, &readfds);
+ if (select(socket->m_fd + 1, &readfds, NULL, NULL, &tv) == 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)
+{
+ struct timeval tv;
+ fd_set writefds;
+
+ /* Linux select() will overwrite the struct on return */
+ tv.tv_sec = (socket->m_timeout / 1000);
+ tv.tv_usec = (socket->m_timeout % 1000) * 1000;
+
+ 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)
+ {
+ socket->m_error = GSOCK_TIMEDOUT;
+ return GSOCK_TIMEDOUT;
+ }
+ }
+ return GSOCK_NOERROR;
}
int _GSocket_Recv_Stream(GSocket *socket, char *buffer, int size)
MASK_SIGNAL();
ret = recv(socket->m_fd, buffer, size, 0);
UNMASK_SIGNAL();
- if (ret == -1) {
- socket->m_error = GSOCK_IOERR;
- return -1;
- }
+
return ret;
}
int _GSocket_Recv_Dgram(GSocket *socket, char *buffer, int size)
{
struct sockaddr from;
- SOCKLEN_T fromlen;
+ SOCKLEN_T fromlen = sizeof(from);
int ret;
+ GSocketError err;
fromlen = sizeof(from);
MASK_SIGNAL();
- ret = recvfrom(socket->m_fd, buffer, size, 0, &from, &fromlen);
+ ret = recvfrom(socket->m_fd, buffer, size, 0, &from, (SOCKLEN_T *) &fromlen);
UNMASK_SIGNAL();
- if (ret == -1) {
- socket->m_error = GSOCK_IOERR;
+
+ if (ret == -1)
return -1;
- }
/* Translate a system address into a GSocket address */
if (!socket->m_peer)
+ {
socket->m_peer = GAddress_new();
- _GAddress_translate_from(socket->m_peer, &from, fromlen);
+ 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;
}
MASK_SIGNAL();
ret = send(socket->m_fd, buffer, size, 0);
UNMASK_SIGNAL();
- if (ret == -1) {
- socket->m_error = GSOCK_IOERR;
- return -1;
- }
+
return ret;
}
{
struct sockaddr *addr;
int len, ret;
+ GSocketError err;
- if (!socket->m_peer) {
+ if (!socket->m_peer)
+ {
socket->m_error = GSOCK_INVADDR;
return -1;
}
- _GAddress_translate_to(socket->m_peer, &addr, &len);
+ err = _GAddress_translate_to(socket->m_peer, &addr, &len);
+ if (err != GSOCK_NOERROR)
+ {
+ socket->m_error = err;
+ return -1;
+ }
MASK_SIGNAL();
ret = sendto(socket->m_fd, buffer, size, 0, addr, len);
UNMASK_SIGNAL();
- if (ret == -1) {
- socket->m_error = GSOCK_IOERR;
- return -1;
- }
/* Frees memory allocated from _GAddress_translate_to */
free(addr);
char c;
int ret;
- if (socket->m_stream) {
- ret = recv(socket->m_fd, &c, 1, MSG_PEEK);
+ ret = recv(socket->m_fd, &c, 1, MSG_PEEK);
- if (ret < 0 && socket->m_server) {
- CALL_FALLBACK(socket, GSOCK_CONNECTION);
+ if (socket->m_stream)
+ {
+ if (ret < 0 && socket->m_server)
+ {
+ CALL_CALLBACK(socket, GSOCK_CONNECTION);
return;
}
+ }
- if (ret > 0) {
- CALL_FALLBACK(socket, GSOCK_INPUT);
- } else {
- CALL_FALLBACK(socket, GSOCK_LOST);
- }
+ if (ret > 0)
+ {
+ CALL_CALLBACK(socket, GSOCK_INPUT);
+ }
+ else
+ {
+ CALL_CALLBACK(socket, GSOCK_LOST);
}
}
void _GSocket_Detected_Write(GSocket *socket)
{
- CALL_FALLBACK(socket, GSOCK_OUTPUT);
-}
+ if (socket->m_establishing && !socket->m_server)
+ {
+ int error;
+ SOCKLEN_T len = sizeof(error);
+
+ socket->m_establishing = FALSE;
-#undef CALL_FALLBACK
-#undef MASK_SIGNAL
-#undef UNMASK_SIGNAL
+ getsockopt(socket->m_fd, SOL_SOCKET, SO_ERROR, (void*) &error, &len);
+
+ if (error)
+ {
+ CALL_CALLBACK(socket, GSOCK_LOST);
+ }
+ else
+ {
+ CALL_CALLBACK(socket, GSOCK_CONNECTION);
+ /* We have to fire this event by hand because CONNECTION (for clients)
+ * and OUTPUT are internally the same and we just disabled CONNECTION
+ * events with the above macro.
+ */
+ CALL_CALLBACK(socket, GSOCK_OUTPUT);
+ }
+ }
+ else
+ {
+ CALL_CALLBACK(socket, GSOCK_OUTPUT);
+ }
+}
/*
* -------------------------------------------------------------------------
* -------------------------------------------------------------------------
*/
-/* 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 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.
*/
-#define CHECK_ADDRESS(address, family, retval) \
-{ \
- if (address->m_family == GSOCK_NOFAMILY) \
- _GAddress_Init_##family(address); \
- if (address->m_family != GSOCK_##family) {\
- address->m_error = GSOCK_INVADDR; \
- return retval; \
- } \
+#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; \
+ } \
}
GAddress *GAddress_new()
{
GAddress *address;
- address = (GAddress *)malloc(sizeof(GAddress));
+ if ((address = (GAddress *) malloc(sizeof(GAddress))) == NULL)
+ return NULL;
address->m_family = GSOCK_NOFAMILY;
address->m_addr = NULL;
assert(address != NULL);
- addr2 = (GAddress *)malloc(sizeof(GAddress));
+ if ((addr2 = (GAddress *) malloc(sizeof(GAddress))) == NULL)
+ return NULL;
+
memcpy(addr2, address, sizeof(GAddress));
- if (address->m_addr) {
+ 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 address->m_family;
}
-void _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:
{
- /* TODO error */
+ address->m_error = GSOCK_INVOP;
+ return GSOCK_INVOP;
}
}
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;
}
-void _GAddress_translate_to(GAddress *address,
- struct sockaddr **addr, int *len)
+GSocketError _GAddress_translate_to(GAddress *address,
+ struct sockaddr **addr, int *len)
{
- if (!address->m_addr) {
- /* TODO error */
- return;
+ 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;
}
/*
* -------------------------------------------------------------------------
*/
-void _GAddress_Init_INET(GAddress *address)
+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;
+ return GSOCK_MEMERR;
+ }
+
address->m_family = GSOCK_INET;
address->m_realfamily = PF_INET;
((struct sockaddr_in *)address->m_addr)->sin_family = AF_INET;
- ((struct sockaddr_in *)address->m_addr)->sin_addr.s_addr = INADDR_ANY;
+ ((struct sockaddr_in *)address->m_addr)->sin_addr.s_addr = INADDR_ANY;
+
+ return GSOCK_NOERROR;
}
GSocketError GAddress_INET_SetHostName(GAddress *address, const char *hostname)
addr = &(((struct sockaddr_in *)address->m_addr)->sin_addr);
/* If it is a numeric host name, convert it now */
- if (inet_aton(hostname, addr) == 0) {
+#if defined(HAVE_INET_ATON)
+ if (inet_aton(hostname, addr) == 0)
+ {
+#elif defined(HAVE_INET_ADDR)
+ if ( (addr->s_addr = inet_addr(hostname)) == -1 )
+ {
+#else
+ /* Use gethostbyname by default */
+ if (1)
+ {
+#endif
struct in_addr *array_addr;
/* It is a real name, we solve it */
- if ((he = gethostbyname(hostname)) == NULL) {
+ 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);
- if (!port) {
+ if (!port)
+ {
address->m_error = GSOCK_INVPORT;
- return GSOCK_INVOP;
+ return GSOCK_INVPORT;
}
se = getservbyname(port, protocol);
- if (!se) {
- if (isdigit(port[0])) {
+ if (!se)
+ {
+ if (isdigit(port[0]))
+ {
int port_int;
port_int = atoi(port);
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) {
+ he = gethostbyaddr(addr_buf, sizeof(addr->sin_addr), AF_INET);
+ if (he == NULL)
+ {
address->m_error = GSOCK_NOHOST;
return GSOCK_NOHOST;
}
* -------------------------------------------------------------------------
*/
-void _GAddress_Init_UNIX(GAddress *address)
+GSocketError _GAddress_Init_UNIX(GAddress *address)
{
address->m_len = sizeof(struct sockaddr_un);
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_UNIX;
address->m_realfamily = PF_UNIX;
((struct sockaddr_un *)address->m_addr)->sun_family = AF_UNIX;
((struct sockaddr_un *)address->m_addr)->sun_path[0] = 0;
+
+ return TRUE;
}
GSocketError GAddress_UNIX_SetPath(GAddress *address, const char *path)
return GSOCK_NOERROR;
}
-#endif // wxUSE_SOCKETS
+#endif /* wxUSE_SOCKETS || defined(__GSOCKET_STANDALONE__) */
+
projects / wxWidgets.git / blobdiff