#include "config.h"
#include "gunixconnection.h"
+#include "gunixcredentialsmessage.h"
#include "glibintl.h"
/**
- * SECTION: gunixconnection
+ * SECTION:gunixconnection
* @title: GUnixConnection
- * @short_description: a TCP #GSocketConnection
+ * @short_description: A UNIX domain GSocketConnection
+ * @include: gio/gunixconnection.h
* @see_also: #GSocketConnection.
*
* This is the subclass of #GSocketConnection that is created
* for UNIX domain sockets.
*
- * It contains functions to do some of the unix socket specific
- * functionallity like passing file descriptors.
+ * It contains functions to do some of the UNIX socket specific
+ * functionality like passing file descriptors.
+ *
+ * Note that <filename><gio/gunixconnection.h></filename> belongs to
+ * the UNIX-specific GIO interfaces, thus you have to use the
+ * <filename>gio-unix-2.0.pc</filename> pkg-config file when using it.
*
* Since: 2.22
- **/
+ */
#include <gio/gsocketcontrolmessage.h>
#include <gio/gunixfdmessage.h>
#include <gio/gsocket.h>
#include <unistd.h>
-#include "gioalias.h"
+#ifdef __linux__
+/* for getsockopt() and setsockopt() */
+#include <sys/types.h> /* See NOTES */
+#include <sys/socket.h>
+#include <errno.h>
+#include <string.h>
+#endif
+
G_DEFINE_TYPE_WITH_CODE (GUnixConnection, g_unix_connection,
G_TYPE_SOCKET_CONNECTION,
g_socket_connection_factory_register_type (g_define_type_id,
G_SOCKET_FAMILY_UNIX,
G_SOCKET_TYPE_STREAM,
- 0);
+ G_SOCKET_PROTOCOL_DEFAULT);
);
/**
* g_unix_connection_send_fd:
- * @connection: a #GUnixConnection.
+ * @connection: a #GUnixConnection
* @fd: a file descriptor
- * @cancellable: optional #GCancellable object, %NULL to ignore.
- * @error: #GError for error reporting, or %NULL to ignore.
+ * @cancellable: (allow-none): optional #GCancellable object, %NULL to ignore.
+ * @error: (allow-none): #GError for error reporting, or %NULL to ignore.
*
- * Passes a file descriptor to the recieving side of the
- * connection. The recieving end has to call g_unix_connection_receive_fd()
+ * Passes a file descriptor to the receiving side of the
+ * connection. The receiving end has to call g_unix_connection_receive_fd()
* to accept the file descriptor.
*
* As well as sending the fd this also writes a single byte to the
* Returns: a %TRUE on success, %NULL on error.
*
* Since: 2.22
- **/
+ */
gboolean
g_unix_connection_send_fd (GUnixConnection *connection,
gint fd,
}
g_object_get (connection, "socket", &socket, NULL);
- if (!g_socket_condition_wait (socket, G_IO_OUT, cancellable, error) ||
- g_socket_send_message (socket, NULL, NULL, 0, &scm, 1, 0, error) != 1)
+ if (g_socket_send_message (socket, NULL, NULL, 0, &scm, 1, 0, cancellable, error) != 1)
/* XXX could it 'fail' with zero? */
{
g_object_unref (socket);
/**
* g_unix_connection_receive_fd:
- * @connection: a #GUnixConnection.
- * @cancellable: optional #GCancellable object, %NULL to ignore.
- * @error: #GError for error reporting, or %NULL to ignore.
+ * @connection: a #GUnixConnection
+ * @cancellable: (allow-none): optional #GCancellable object, %NULL to ignore
+ * @error: (allow-none): #GError for error reporting, or %NULL to ignore
*
- * Recieves a file descriptor from the sending end of the
- * connection. The sending end has to call g_unix_connection_send_fd()
- * for this to work.
+ * Receives a file descriptor from the sending end of the connection.
+ * The sending end has to call g_unix_connection_send_fd() for this
+ * to work.
*
* As well as reading the fd this also reads a single byte from the
* stream, as this is required for fd passing to work on some
g_return_val_if_fail (G_IS_UNIX_CONNECTION (connection), -1);
g_object_get (connection, "socket", &socket, NULL);
- if (!g_socket_condition_wait (socket, G_IO_IN, cancellable, error) ||
- g_socket_receive_message (socket, NULL, NULL, 0,
- &scms, &nscm, NULL, error) != 1)
+ if (g_socket_receive_message (socket, NULL, NULL, 0,
+ &scms, &nscm, NULL, cancellable, error) != 1)
/* XXX it _could_ 'fail' with zero. */
{
g_object_unref (socket);
if (fd < 0)
{
- g_set_error (error, G_IO_ERROR, G_IO_ERROR_FAILED,
- _("Received invalid fd"));
+ g_set_error_literal (error, G_IO_ERROR, G_IO_ERROR_FAILED,
+ _("Received invalid fd"));
fd = -1;
}
GError **error);
*/
-#define __G_UNIX_CONNECTION_C__
-#include "gioaliasdef.c"
+
+/**
+ * g_unix_connection_send_credentials:
+ * @connection: A #GUnixConnection.
+ * @cancellable: (allow-none): A #GCancellable or %NULL.
+ * @error: Return location for error or %NULL.
+ *
+ * Passes the credentials of the current user the receiving side
+ * of the connection. The receiving end has to call
+ * g_unix_connection_receive_credentials() (or similar) to accept the
+ * credentials.
+ *
+ * As well as sending the credentials this also writes a single NUL
+ * byte to the stream, as this is required for credentials passing to
+ * work on some implementations.
+ *
+ * Other ways to exchange credentials with a foreign peer includes the
+ * #GUnixCredentialsMessage type and g_socket_get_credentials() function.
+ *
+ * Returns: %TRUE on success, %FALSE if @error is set.
+ *
+ * Since: 2.26
+ */
+gboolean
+g_unix_connection_send_credentials (GUnixConnection *connection,
+ GCancellable *cancellable,
+ GError **error)
+{
+ GCredentials *credentials;
+ GSocketControlMessage *scm;
+ GSocket *socket;
+ gboolean ret;
+ GOutputVector vector;
+ guchar nul_byte[1] = {'\0'};
+ gint num_messages;
+
+ g_return_val_if_fail (G_IS_UNIX_CONNECTION (connection), FALSE);
+ g_return_val_if_fail (error == NULL || *error == NULL, FALSE);
+
+ ret = FALSE;
+
+ credentials = g_credentials_new ();
+
+ vector.buffer = &nul_byte;
+ vector.size = 1;
+
+ if (g_unix_credentials_message_is_supported ())
+ {
+ scm = g_unix_credentials_message_new_with_credentials (credentials);
+ num_messages = 1;
+ }
+ else
+ {
+ scm = NULL;
+ num_messages = 0;
+ }
+
+ g_object_get (connection, "socket", &socket, NULL);
+ if (g_socket_send_message (socket,
+ NULL, /* address */
+ &vector,
+ 1,
+ &scm,
+ num_messages,
+ G_SOCKET_MSG_NONE,
+ cancellable,
+ error) != 1)
+ {
+ g_prefix_error (error, _("Error sending credentials: "));
+ goto out;
+ }
+
+ ret = TRUE;
+
+ out:
+ g_object_unref (socket);
+ if (scm != NULL)
+ g_object_unref (scm);
+ g_object_unref (credentials);
+ return ret;
+}
+
+/**
+ * g_unix_connection_receive_credentials:
+ * @connection: A #GUnixConnection.
+ * @cancellable: (allow-none): A #GCancellable or %NULL.
+ * @error: Return location for error or %NULL.
+ *
+ * Receives credentials from the sending end of the connection. The
+ * sending end has to call g_unix_connection_send_credentials() (or
+ * similar) for this to work.
+ *
+ * As well as reading the credentials this also reads (and discards) a
+ * single byte from the stream, as this is required for credentials
+ * passing to work on some implementations.
+ *
+ * Other ways to exchange credentials with a foreign peer includes the
+ * #GUnixCredentialsMessage type and g_socket_get_credentials() function.
+ *
+ * Returns: (transfer full): Received credentials on success (free with
+ * g_object_unref()), %NULL if @error is set.
+ *
+ * Since: 2.26
+ */
+GCredentials *
+g_unix_connection_receive_credentials (GUnixConnection *connection,
+ GCancellable *cancellable,
+ GError **error)
+{
+ GCredentials *ret;
+ GSocketControlMessage **scms;
+ gint nscm;
+ GSocket *socket;
+ gint n;
+ volatile GType credentials_message_gtype;
+ gssize num_bytes_read;
+#ifdef __linux__
+ gboolean turn_off_so_passcreds;
+#endif
+
+ g_return_val_if_fail (G_IS_UNIX_CONNECTION (connection), NULL);
+ g_return_val_if_fail (error == NULL || *error == NULL, NULL);
+
+ ret = NULL;
+ scms = NULL;
+
+ g_object_get (connection, "socket", &socket, NULL);
+
+ /* On Linux, we need to turn on SO_PASSCRED if it isn't enabled
+ * already. We also need to turn it off when we're done. See
+ * #617483 for more discussion.
+ */
+#ifdef __linux__
+ {
+ gint opt_val;
+ socklen_t opt_len;
+
+ turn_off_so_passcreds = FALSE;
+ opt_val = 0;
+ opt_len = sizeof (gint);
+ if (getsockopt (g_socket_get_fd (socket),
+ SOL_SOCKET,
+ SO_PASSCRED,
+ &opt_val,
+ &opt_len) != 0)
+ {
+ g_set_error (error,
+ G_IO_ERROR,
+ g_io_error_from_errno (errno),
+ _("Error checking if SO_PASSCRED is enabled for socket: %s"),
+ strerror (errno));
+ goto out;
+ }
+ if (opt_len != sizeof (gint))
+ {
+ g_set_error (error,
+ G_IO_ERROR,
+ G_IO_ERROR_FAILED,
+ _("Unexpected option length while checking if SO_PASSCRED is enabled for socket. "
+ "Expected %d bytes, got %d"),
+ (gint) sizeof (gint), (gint) opt_len);
+ goto out;
+ }
+ if (opt_val == 0)
+ {
+ opt_val = 1;
+ if (setsockopt (g_socket_get_fd (socket),
+ SOL_SOCKET,
+ SO_PASSCRED,
+ &opt_val,
+ sizeof opt_val) != 0)
+ {
+ g_set_error (error,
+ G_IO_ERROR,
+ g_io_error_from_errno (errno),
+ _("Error enabling SO_PASSCRED: %s"),
+ strerror (errno));
+ goto out;
+ }
+ turn_off_so_passcreds = TRUE;
+ }
+ }
+#endif
+
+ /* ensure the type of GUnixCredentialsMessage has been registered with the type system */
+ credentials_message_gtype = G_TYPE_UNIX_CREDENTIALS_MESSAGE;
+ (credentials_message_gtype); /* To avoid -Wunused-but-set-variable */
+ num_bytes_read = g_socket_receive_message (socket,
+ NULL, /* GSocketAddress **address */
+ NULL,
+ 0,
+ &scms,
+ &nscm,
+ NULL,
+ cancellable,
+ error);
+ if (num_bytes_read != 1)
+ {
+ /* Handle situation where g_socket_receive_message() returns
+ * 0 bytes and not setting @error
+ */
+ if (num_bytes_read == 0 && error != NULL && *error == NULL)
+ {
+ g_set_error_literal (error,
+ G_IO_ERROR,
+ G_IO_ERROR_FAILED,
+ _("Expecting to read a single byte for receiving credentials but read zero bytes"));
+ }
+ goto out;
+ }
+
+ if (g_unix_credentials_message_is_supported ())
+ {
+ if (nscm != 1)
+ {
+ g_set_error (error,
+ G_IO_ERROR,
+ G_IO_ERROR_FAILED,
+ _("Expecting 1 control message, got %d"),
+ nscm);
+ goto out;
+ }
+
+ if (!G_IS_UNIX_CREDENTIALS_MESSAGE (scms[0]))
+ {
+ g_set_error_literal (error,
+ G_IO_ERROR,
+ G_IO_ERROR_FAILED,
+ _("Unexpected type of ancillary data"));
+ goto out;
+ }
+
+ ret = g_unix_credentials_message_get_credentials (G_UNIX_CREDENTIALS_MESSAGE (scms[0]));
+ g_object_ref (ret);
+ }
+ else
+ {
+ if (nscm != 0)
+ {
+ g_set_error (error,
+ G_IO_ERROR,
+ G_IO_ERROR_FAILED,
+ _("Not expecting control message, but got %d"),
+ nscm);
+ goto out;
+ }
+ else
+ {
+ ret = g_socket_get_credentials (socket, error);
+ }
+ }
+
+ out:
+
+#ifdef __linux__
+ if (turn_off_so_passcreds)
+ {
+ gint opt_val;
+ opt_val = 0;
+ if (setsockopt (g_socket_get_fd (socket),
+ SOL_SOCKET,
+ SO_PASSCRED,
+ &opt_val,
+ sizeof opt_val) != 0)
+ {
+ g_set_error (error,
+ G_IO_ERROR,
+ g_io_error_from_errno (errno),
+ _("Error while disabling SO_PASSCRED: %s"),
+ strerror (errno));
+ goto out;
+ }
+ }
+#endif
+
+ if (scms != NULL)
+ {
+ for (n = 0; n < nscm; n++)
+ g_object_unref (scms[n]);
+ g_free (scms);
+ }
+ g_object_unref (socket);
+ return ret;
+}
projects / platform / upstream / glib.git / blobdiff