*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*
*/
* Gets the data to be sent over the network for this message.
* The header and then the body should be written out.
* This function is guaranteed to always return the same
- * data once a message is locked (with _dbus_message_lock()).
+ * data once a message is locked (with dbus_message_lock()).
*
* @param message the message.
* @param header return location for message header data.
* Sets the serial number of a message.
* This can only be done once on a message.
*
+ * DBusConnection will automatically set the serial to an appropriate value
+ * when the message is sent; this function is only needed when encapsulating
+ * messages in another protocol, or otherwise bypassing DBusConnection.
+ *
* @param message the message
* @param serial the serial
*/
-void
-_dbus_message_set_serial (DBusMessage *message,
- dbus_uint32_t serial)
+void
+dbus_message_set_serial (DBusMessage *message,
+ dbus_uint32_t serial)
{
- _dbus_assert (message != NULL);
- _dbus_assert (!message->locked);
- _dbus_assert (dbus_message_get_serial (message) == 0);
+ _dbus_return_if_fail (message != NULL);
+ _dbus_return_if_fail (!message->locked);
_dbus_header_set_serial (&message->header, serial);
}
* reference to a message in the outgoing queue and change it
* underneath us. Messages are locked when they enter the outgoing
* queue (dbus_connection_send_message()), and the library complains
- * if the message is modified while locked.
+ * if the message is modified while locked. This function may also
+ * called externally, for applications wrapping D-Bus in another protocol.
*
* @param message the message to lock.
*/
void
-_dbus_message_lock (DBusMessage *message)
+dbus_message_lock (DBusMessage *message)
{
if (!message->locked)
{
if (!dbus_message_iter_append_fixed_array (&array,
element_type,
value,
- n_elements))
+ n_elements)) {
+ dbus_message_iter_abandon_container (&iter, &array);
goto failed;
+ }
}
else if (element_type == DBUS_TYPE_STRING ||
element_type == DBUS_TYPE_SIGNATURE ||
{
if (!dbus_message_iter_append_basic (&array,
element_type,
- &value[i]))
+ &value[i])) {
+ dbus_message_iter_abandon_container (&iter, &array);
goto failed;
+ }
++i;
}
}
*
* The easiest way to iterate is like this:
* @code
- * dbus_message_iter_init (&iter);
+ * dbus_message_iter_init (message, &iter);
* while ((current_type = dbus_message_iter_get_arg_type (&iter)) != DBUS_TYPE_INVALID)
* dbus_message_iter_next (&iter);
* @endcode
return retval;
}
+/**
+ * Frees the signature string and marks the iterator as not having a
+ * type_str anymore. Since the new signature is not set, the message
+ * will generally be hosed after this is called.
+ *
+ * @param real an iterator without a type_str
+ */
+static void
+_dbus_message_iter_abandon_signature (DBusMessageRealIter *real)
+{
+ DBusString *str;
+
+ _dbus_assert (real->iter_type == DBUS_MESSAGE_ITER_TYPE_WRITER);
+ _dbus_assert (real->u.writer.type_str != NULL);
+ _dbus_assert (real->sig_refcount > 0);
+
+ real->sig_refcount -= 1;
+
+ if (real->sig_refcount > 0)
+ return;
+ _dbus_assert (real->sig_refcount == 0);
+
+ str = real->u.writer.type_str;
+
+ _dbus_type_writer_remove_types (&real->u.writer);
+ _dbus_string_free (str);
+ dbus_free (str);
+}
+
#ifndef DBUS_DISABLE_CHECKS
static dbus_bool_t
_dbus_message_iter_append_check (DBusMessageRealIter *iter)
}
/**
+ * Abandons creation of a contained-typed value and frees resources created
+ * by dbus_message_iter_open_container(). Once this returns, the message
+ * is hosed and you have to start over building the whole message.
+ *
+ * This should only be used to abandon creation of a message when you have
+ * open containers.
+ *
+ * @param iter the append iterator
+ * @param sub sub-iterator to close
+ */
+void
+dbus_message_iter_abandon_container (DBusMessageIter *iter,
+ DBusMessageIter *sub)
+{
+ DBusMessageRealIter *real = (DBusMessageRealIter *)iter;
+ DBusMessageRealIter *real_sub = (DBusMessageRealIter *)sub;
+
+ _dbus_return_if_fail (_dbus_message_iter_append_check (real));
+ _dbus_return_if_fail (real->iter_type == DBUS_MESSAGE_ITER_TYPE_WRITER);
+ _dbus_return_if_fail (_dbus_message_iter_append_check (real_sub));
+ _dbus_return_if_fail (real_sub->iter_type == DBUS_MESSAGE_ITER_TYPE_WRITER);
+
+ _dbus_message_iter_abandon_signature (real);
+}
+
+/**
* Sets a flag indicating that the message does not want a reply; if
* this flag is set, the other end of the connection may (but is not
* required to) optimize by not sending method return or error
_dbus_string_delete (&loader->data, 0, header_len + body_len);
+ /* don't waste more than 2k of memory */
+ _dbus_string_compact (&loader->data, 2048);
+
_dbus_assert (_dbus_string_get_length (&message->header.data) == header_len);
_dbus_assert (_dbus_string_get_length (&message->body) == body_len);
}
/**
+ * Checks what kind of bad data confused the loader.
+ *
+ * @param loader the loader
+ * @returns why the loader is hosed, or DBUS_VALID if it isn't.
+ */
+DBusValidity
+_dbus_message_loader_get_corruption_reason (DBusMessageLoader *loader)
+{
+ _dbus_assert ((loader->corrupted && loader->corruption_reason != DBUS_VALID) ||
+ (!loader->corrupted && loader->corruption_reason == DBUS_VALID));
+
+ return loader->corruption_reason;
+}
+
+/**
* Sets the maximum size message we allow.
*
* @param loader the loader
int *len_p)
{
DBusString tmp;
+ dbus_bool_t was_locked;
_dbus_return_val_if_fail (msg != NULL, FALSE);
_dbus_return_val_if_fail (marshalled_data_p != NULL, FALSE);
_dbus_return_val_if_fail (len_p != NULL, FALSE);
-
+
if (!_dbus_string_init (&tmp))
return FALSE;
+ /* Ensure the message is locked, to ensure the length header is filled in. */
+ was_locked = msg->locked;
+
+ if (!was_locked)
+ dbus_message_lock (msg);
+
if (!_dbus_string_copy (&(msg->header.data), 0, &tmp, 0))
goto fail;
goto fail;
_dbus_string_free (&tmp);
+
+ if (!was_locked)
+ msg->locked = FALSE;
+
return TRUE;
fail:
_dbus_string_free (&tmp);
+
+ if (!was_locked)
+ msg->locked = FALSE;
+
return FALSE;
}
return msg;
fail_corrupt:
- dbus_set_error (error, DBUS_ERROR_INVALID_ARGS, "Message is corrupted");
+ dbus_set_error (error, DBUS_ERROR_INVALID_ARGS, "Message is corrupted (%s)",
+ _dbus_validity_to_error_message (loader->corruption_reason));
_dbus_message_loader_unref (loader);
return NULL;
return NULL;
}
+/**
+ * Returns the number of bytes required to be in the buffer to demarshal a
+ * D-Bus message.
+ *
+ * Generally, this function is only useful for encapsulating D-Bus messages in
+ * a different protocol.
+ *
+ * @param str data to be marshalled
+ * @param len the length of str
+ * @param error the location to save errors to
+ * @returns -1 if there was no valid data to be demarshalled, 0 if there wasn't enough data to determine how much should be demarshalled. Otherwise returns the number of bytes to be demarshalled
+ *
+ */
+int
+dbus_message_demarshal_bytes_needed(const char *buf,
+ int len)
+{
+ DBusString str;
+ int byte_order, fields_array_len, header_len, body_len;
+ DBusValidity validity = DBUS_VALID;
+ int have_message;
+
+ if (!buf || len < DBUS_MINIMUM_HEADER_SIZE)
+ return 0;
+
+ if (len > DBUS_MAXIMUM_MESSAGE_LENGTH)
+ len = DBUS_MAXIMUM_MESSAGE_LENGTH;
+ _dbus_string_init_const_len (&str, buf, len);
+
+ validity = DBUS_VALID;
+ have_message
+ = _dbus_header_have_message_untrusted(DBUS_MAXIMUM_MESSAGE_LENGTH,
+ &validity, &byte_order,
+ &fields_array_len,
+ &header_len,
+ &body_len,
+ &str, 0,
+ len);
+ _dbus_string_free (&str);
+
+ if (validity == DBUS_VALID)
+ {
+ _dbus_assert(have_message);
+ return header_len + body_len;
+ }
+ else
+ {
+ return -1; /* broken! */
+ }
+}
+
/** @} */
/* tests in dbus-message-util.c */
projects / platform / upstream / dbus.git / blobdiff