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;; This file is part of scheme-GNUnet, a partial Scheme port of GNUnet.
;; Copyright (C) 2003, 2004, 2005, 2006, 2008, 2009, 2010, 2021 GNUnet e.V.
;;
;; GNUnet is free software: you can redistribute it and/or modify it
;; under the terms of the GNU Affero General Public License as published
;; by the Free Software Foundation, either version 3 of the License,
;; or (at your option) any later version.
;;
;; GNUnet is distributed in the hope that it will be useful, but
;; WITHOUT ANY WARRANTY; without even the implied warranty of
;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
;; Affero General Public License for more details.
;;
;; You should have received a copy of the GNU Affero General Public License
;; along with this program. If not, see <http://www.gnu.org/licenses/>.
;;
;; SPDX-License-Identifier: AGPL-3.0-or-later
;;
;; As a special exception to the GNU Affero General Public License,
;; the file may be relicensed under any license used for
;; most source code of GNUnet 0.13.1, or later versions, as published by
;; GNUnet e.V.
** Definitions
uint32/be: big endian uint32_t (network order)
** Directory TODO
Magic constant: "\211GND\r\n\032\n"
structure:
magic;
meta-data-size as uint32;
meta-data (size: meta-data-size);
entry ...
entry:
??? alignment padding
uri
??? force to next aligment?
meta-data-size as uint32;
meta-data (size: meta-data-size)
uri is null-terminated
** Metadata
struct meta_data_header {
;; The version of the MD serialization. The highest bit is used to
;; indicate compression.
;;
;; Version 0 is traditional (pre-0.9) meta data (unsupported)
;; Version is 1 for a NULL pointer
;; Version 2 is for 0.9.x (and possibly higher)
;; Other version numbers are not yet defined.
version as uint32/be;
;; How many MD entries are there?
entries as uint32/be;
;; Number of bytes of meta data
size as uint32/be;
}
struct meta_data {
struct meta_data_header header;
switch header.version {
case 0: ???
case 1: ???
/* Current version! */
case 2:
(the following compressed iff header.version & COMPRESSION):
a list mde (length entries) (type: struct MetaDataEntry);
;; XXX verify
foreach (e in mde, in reverse) {
/* length 0 is allowed for strings. This means the string is NULL */
mime_type as \0 terminated ASCII (length including \0: e.mime_type_length);
plugin_name as \0 terminated ASCII (length including \0: e.plugin_name_length);
data as a block of byte (length: e.data_size)
}
break;
default: ???
}
struct meta_data_entry {
;; Meta data type
type as uint32_t
;; Meta data format (UTF8, binary, ...)
format as uint32_t
;; Number of bytes in meta data.
data_size as uint32_t/be
;; Number of bytes in the plugin name including 0-terminator.
;; 0 for no plugin name.
plugin_name_length as uint32_t/be
;; Number of bytes in the mime type including 0-terminator.
;; 0 for NULL.
mime_type_length as uint32_t/be
}
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