2 This file is part of GNUnet.
3 (C) 2003, 2004, 2005, 2006, 2008, 2009, 2010 Christian Grothoff (and other contributing authors)
5 GNUnet is free software; you can redistribute it and/or modify
6 it under the terms of the GNU General Public License as published
7 by the Free Software Foundation; either version 2, or (at your
8 option) any later version.
10 GNUnet is distributed in the hope that it will be useful, but
11 WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 General Public License for more details.
15 You should have received a copy of the GNU General Public License
16 along with GNUnet; see the file COPYING. If not, write to the
17 Free Software Foundation, Inc., 59 Temple Place - Suite 330,
18 Boston, MA 02111-1307, USA.
22 * @file util/container_meta_data.c
23 * @brief Storing of meta data
24 * @author Christian Grothoff
28 #include "gnunet_common.h"
29 #include "gnunet_container_lib.h"
30 #include "gnunet_strings_lib.h"
31 #include "gnunet_time_lib.h"
32 #include <extractor.h>
35 #define LOG(kind,...) GNUNET_log_from (kind, "util", __VA_ARGS__)
43 * This is a linked list.
45 struct MetaItem *next;
48 * Name of the extracting plugin.
58 * The actual meta data.
63 * Number of bytes in 'data'.
68 * Type of the meta data.
70 enum EXTRACTOR_MetaType type;
73 * Format of the meta data.
75 enum EXTRACTOR_MetaFormat format;
80 * Meta data to associate with a file, directory or namespace.
82 struct GNUNET_CONTAINER_MetaData
85 * Linked list of the meta data items.
87 struct MetaItem *items;
90 * Complete serialized and compressed buffer of the items.
91 * NULL if we have not computed that buffer yet.
96 * Number of bytes in 'sbuf'. 0 if the buffer is stale.
101 * Number of items in the linked list.
103 unsigned int item_count;
109 * Create a fresh struct CONTAINER_MetaData token.
111 * @return empty meta-data container
113 struct GNUNET_CONTAINER_MetaData *
114 GNUNET_CONTAINER_meta_data_create ()
116 return GNUNET_malloc (sizeof (struct GNUNET_CONTAINER_MetaData));
121 * Free meta data item.
123 * @param item item to free
126 meta_item_free (struct MetaItem *item)
128 GNUNET_free_non_null (item->plugin_name);
129 GNUNET_free_non_null (item->mime_type);
130 GNUNET_free_non_null (item->data);
136 * The meta data has changed, invalidate its serialization
139 * @param md meta data that changed
142 invalidate_sbuf (struct GNUNET_CONTAINER_MetaData *md)
144 if (md->sbuf == NULL)
146 GNUNET_free (md->sbuf);
155 * @param md what to free
158 GNUNET_CONTAINER_meta_data_destroy (struct GNUNET_CONTAINER_MetaData *md)
160 struct MetaItem *item;
164 while (NULL != (item = md->items))
166 md->items = item->next;
167 meta_item_free (item);
169 GNUNET_free_non_null (md->sbuf);
175 * Remove all items in the container.
177 * @param md metadata to manipulate
180 GNUNET_CONTAINER_meta_data_clear (struct GNUNET_CONTAINER_MetaData *md)
182 struct MetaItem *item;
186 while (NULL != (item = md->items))
188 md->items = item->next;
189 meta_item_free (item);
191 GNUNET_free_non_null (md->sbuf);
192 memset (md, 0, sizeof (struct GNUNET_CONTAINER_MetaData));
198 * Test if two MDs are equal. We consider them equal if
199 * the meta types, formats and content match (we do not
200 * include the mime types and plugins names in this
203 * @param md1 first value to check
204 * @param md2 other value to check
205 * @return GNUNET_YES if they are equal
208 GNUNET_CONTAINER_meta_data_test_equal (const struct GNUNET_CONTAINER_MetaData
210 const struct GNUNET_CONTAINER_MetaData
219 if (md1->item_count != md2->item_count)
229 if ((i->type == j->type) && (i->format == j->format) &&
230 (i->data_size == j->data_size) &&
231 (0 == memcmp (i->data, j->data, i->data_size)))
238 if (found == GNUNET_NO)
247 * Extend metadata. Note that the list of meta data items is
248 * sorted by size (largest first).
250 * @param md metadata to extend
251 * @param plugin_name name of the plugin that produced this value;
252 * special values can be used (i.e. '<zlib>' for zlib being
253 * used in the main libextractor library and yielding
255 * @param type libextractor-type describing the meta data
256 * @param format basic format information about data
257 * @param data_mime_type mime-type of data (not of the original file);
258 * can be NULL (if mime-type is not known)
259 * @param data actual meta-data found
260 * @param data_len number of bytes in data
261 * @return GNUNET_OK on success, GNUNET_SYSERR if this entry already exists
262 * data_mime_type and plugin_name are not considered for "exists" checks
265 GNUNET_CONTAINER_meta_data_insert (struct GNUNET_CONTAINER_MetaData *md,
266 const char *plugin_name,
267 enum EXTRACTOR_MetaType type,
268 enum EXTRACTOR_MetaFormat format,
269 const char *data_mime_type, const char *data,
272 struct MetaItem *prev;
273 struct MetaItem *pos;
281 if (pos->data_size < data_len)
283 if ((pos->type == type) && (pos->data_size == data_len) &&
284 (0 == memcmp (pos->data, data, data_len)))
286 if ((pos->mime_type == NULL) && (data_mime_type != NULL))
288 pos->mime_type = GNUNET_strdup (data_mime_type);
289 invalidate_sbuf (md);
291 if ((pos->format == EXTRACTOR_METAFORMAT_C_STRING) &&
292 (format == EXTRACTOR_METAFORMAT_UTF8))
294 pos->format = EXTRACTOR_METAFORMAT_UTF8;
295 invalidate_sbuf (md);
297 return GNUNET_SYSERR;
303 i = GNUNET_malloc (sizeof (struct MetaItem));
306 i->data_size = data_len;
313 (data_mime_type == NULL) ? NULL : GNUNET_strdup (data_mime_type);
314 i->plugin_name = (plugin_name == NULL) ? NULL : GNUNET_strdup (plugin_name);
315 i->data = GNUNET_malloc (data_len);
316 memcpy (i->data, data, data_len);
317 /* change OS native dir separators to unix '/' and others to '_' */
318 if (type == EXTRACTOR_METATYPE_FILENAME)
321 while ((*p != '\0') && (p < i->data + data_len))
323 if (*p == DIR_SEPARATOR)
330 invalidate_sbuf (md);
336 * Merge given meta data.
338 * @param cls the 'struct GNUNET_CONTAINER_MetaData' to merge into
339 * @param plugin_name name of the plugin that produced this value;
340 * special values can be used (i.e. '<zlib>' for zlib being
341 * used in the main libextractor library and yielding
343 * @param type libextractor-type describing the meta data
344 * @param format basic format information about data
345 * @param data_mime_type mime-type of data (not of the original file);
346 * can be NULL (if mime-type is not known)
347 * @param data actual meta-data found
348 * @param data_len number of bytes in data
349 * @return 0 (to continue)
352 merge_helper (void *cls, const char *plugin_name, enum EXTRACTOR_MetaType type,
353 enum EXTRACTOR_MetaFormat format, const char *data_mime_type,
354 const char *data, size_t data_len)
356 struct GNUNET_CONTAINER_MetaData *md = cls;
358 (void) GNUNET_CONTAINER_meta_data_insert (md, plugin_name, type, format,
359 data_mime_type, data, data_len);
365 * Extend metadata. Merges the meta data from the second argument
366 * into the first, discarding duplicate key-value pairs.
368 * @param md metadata to extend
369 * @param in metadata to merge
372 GNUNET_CONTAINER_meta_data_merge (struct GNUNET_CONTAINER_MetaData *md,
373 const struct GNUNET_CONTAINER_MetaData *in)
375 GNUNET_CONTAINER_meta_data_iterate (in, &merge_helper, md);
382 * @param md metadata to manipulate
383 * @param type type of the item to remove
384 * @param data specific value to remove, NULL to remove all
385 * entries of the given type
386 * @param data_len number of bytes in data
387 * @return GNUNET_OK on success, GNUNET_SYSERR if the item does not exist in md
390 GNUNET_CONTAINER_meta_data_delete (struct GNUNET_CONTAINER_MetaData *md,
391 enum EXTRACTOR_MetaType type,
392 const char *data, size_t data_len)
394 struct MetaItem *pos;
395 struct MetaItem *prev;
401 if ((pos->type == type) &&
403 ((pos->data_size == data_len) &&
404 (0 == memcmp (pos->data, data, data_len)))))
407 md->items = pos->next;
409 prev->next = pos->next;
410 meta_item_free (pos);
412 invalidate_sbuf (md);
418 return GNUNET_SYSERR;
423 * Add the current time as the publication date
426 * @param md metadata to modify
429 GNUNET_CONTAINER_meta_data_add_publication_date (struct
430 GNUNET_CONTAINER_MetaData *md)
433 struct GNUNET_TIME_Absolute t;
435 t = GNUNET_TIME_absolute_get ();
436 GNUNET_CONTAINER_meta_data_delete (md, EXTRACTOR_METATYPE_PUBLICATION_DATE,
438 dat = GNUNET_STRINGS_absolute_time_to_string (t);
439 GNUNET_CONTAINER_meta_data_insert (md, "<gnunet>",
440 EXTRACTOR_METATYPE_PUBLICATION_DATE,
441 EXTRACTOR_METAFORMAT_UTF8, "text/plain",
442 dat, strlen (dat) + 1);
448 * Iterate over MD entries.
450 * @param md metadata to inspect
451 * @param iter function to call on each entry
452 * @param iter_cls closure for iterator
453 * @return number of entries
456 GNUNET_CONTAINER_meta_data_iterate (const struct GNUNET_CONTAINER_MetaData *md,
457 EXTRACTOR_MetaDataProcessor iter,
460 struct MetaItem *pos;
465 return md->item_count;
470 iter (iter_cls, pos->plugin_name, pos->type, pos->format,
471 pos->mime_type, pos->data, pos->data_size))
472 return md->item_count;
475 return md->item_count;
480 * Get the first MD entry of the given type. Caller
481 * is responsible for freeing the return value.
482 * Also, only meta data items that are strings (0-terminated)
483 * are returned by this function.
485 * @param md metadata to inspect
486 * @param type type to look for
487 * @return NULL if no entry was found
490 GNUNET_CONTAINER_meta_data_get_by_type (const struct GNUNET_CONTAINER_MetaData
491 *md, enum EXTRACTOR_MetaType type)
493 struct MetaItem *pos;
500 if ((type == pos->type) &&
501 ((pos->format == EXTRACTOR_METAFORMAT_UTF8) ||
502 (pos->format == EXTRACTOR_METAFORMAT_C_STRING)))
503 return GNUNET_strdup (pos->data);
511 * Get the first matching MD entry of the given types. Caller is
512 * responsible for freeing the return value. Also, only meta data
513 * items that are strings (0-terminated) are returned by this
516 * @param md metadata to inspect
517 * @param ... -1-terminated list of types
518 * @return NULL if we do not have any such entry,
519 * otherwise client is responsible for freeing the value!
522 GNUNET_CONTAINER_meta_data_get_first_by_types (const struct
523 GNUNET_CONTAINER_MetaData *md,
528 enum EXTRACTOR_MetaType type;
536 type = va_arg (args, enum EXTRACTOR_MetaType);
540 ret = GNUNET_CONTAINER_meta_data_get_by_type (md, type);
550 * Get a thumbnail from the meta-data (if present).
552 * @param md metadata to get the thumbnail from
553 * @param thumb will be set to the thumbnail data. Must be
554 * freed by the caller!
555 * @return number of bytes in thumbnail, 0 if not available
558 GNUNET_CONTAINER_meta_data_get_thumbnail (const struct GNUNET_CONTAINER_MetaData
559 * md, unsigned char **thumb)
561 struct MetaItem *pos;
562 struct MetaItem *match;
570 if ((NULL != pos->mime_type) &&
571 (0 == strncasecmp ("image/", pos->mime_type, strlen ("image/"))) &&
572 (pos->format == EXTRACTOR_METAFORMAT_BINARY))
576 else if ((match->type != EXTRACTOR_METATYPE_THUMBNAIL) &&
577 (pos->type == EXTRACTOR_METATYPE_THUMBNAIL))
582 if ((match == NULL) || (match->data_size == 0))
584 *thumb = GNUNET_malloc (match->data_size);
585 memcpy (*thumb, match->data, match->data_size);
586 return match->data_size;
591 * Duplicate struct GNUNET_CONTAINER_MetaData.
593 * @param md what to duplicate
594 * @return duplicate meta-data container
596 struct GNUNET_CONTAINER_MetaData *
597 GNUNET_CONTAINER_meta_data_duplicate (const struct GNUNET_CONTAINER_MetaData
600 struct GNUNET_CONTAINER_MetaData *ret;
601 struct MetaItem *pos;
605 ret = GNUNET_CONTAINER_meta_data_create ();
609 GNUNET_CONTAINER_meta_data_insert (ret, pos->plugin_name, pos->type,
610 pos->format, pos->mime_type, pos->data,
620 * Try to compress the given block of data.
622 * @param data block to compress; if compression
623 * resulted in a smaller block, the first
624 * bytes of data are updated to the compressed
626 * @param oldSize number of bytes in data
627 * @param result set to the compressed data
628 * @param newSize set to size of result
629 * @return GNUNET_YES if compression reduce the size,
630 * GNUNET_NO if compression did not help
633 try_compression (const char *data, size_t oldSize, char **result,
640 dlen = compressBound (oldSize);
642 dlen = oldSize + (oldSize / 100) + 20;
643 /* documentation says 100.1% oldSize + 12 bytes, but we
644 * should be able to overshoot by more to be safe */
646 tmp = GNUNET_malloc (dlen);
648 compress2 ((Bytef *) tmp, &dlen, (const Bytef *) data, oldSize, 9))
663 * Flag in 'version' that indicates compressed meta-data.
665 #define HEADER_COMPRESSED 0x80000000
669 * Bits in 'version' that give the version number.
671 #define HEADER_VERSION_MASK 0x7FFFFFFF
675 * Header for serialized meta data.
677 struct MetaDataHeader
680 * The version of the MD serialization. The highest bit is used to
681 * indicate compression.
683 * Version 0 is traditional (pre-0.9) meta data (unsupported)
684 * Version is 1 for a NULL pointer
685 * Version 2 is for 0.9.x (and possibly higher)
686 * Other version numbers are not yet defined.
691 * How many MD entries are there?
696 * Size of the decompressed meta data.
701 * This is followed by 'entries' values of type 'struct MetaDataEntry'
702 * and then by 'entry' plugin names, mime-types and data blocks
703 * as specified in those meta data entries.
709 * Entry of serialized meta data.
714 * Meta data type. Corresponds to an 'enum EXTRACTOR_MetaType'
719 * Meta data format. Corresponds to an 'enum EXTRACTOR_MetaFormat'
724 * Number of bytes of meta data.
729 * Number of bytes in the plugin name including 0-terminator. 0 for NULL.
731 uint32_t plugin_name_len;
734 * Number of bytes in the mime type including 0-terminator. 0 for NULL.
736 uint32_t mime_type_len;
742 * Serialize meta-data to target.
744 * @param md metadata to serialize
745 * @param target where to write the serialized metadata;
746 * *target can be NULL, in which case memory is allocated
747 * @param max maximum number of bytes available in target
748 * @param opt is it ok to just write SOME of the
749 * meta-data to match the size constraint,
750 * possibly discarding some data?
751 * @return number of bytes written on success,
752 * GNUNET_SYSERR on error (typically: not enough
756 GNUNET_CONTAINER_meta_data_serialize (const struct GNUNET_CONTAINER_MetaData
757 *md, char **target, size_t max,
759 GNUNET_CONTAINER_MetaDataSerializationOptions
762 struct GNUNET_CONTAINER_MetaData *vmd;
763 struct MetaItem *pos;
764 struct MetaDataHeader ihdr;
765 struct MetaDataHeader *hdr;
766 struct MetaDataEntry *ent;
781 if (max < sizeof (struct MetaDataHeader))
782 return GNUNET_SYSERR; /* far too small */
786 if (md->sbuf != NULL)
788 /* try to use serialization cache */
789 if (md->sbuf_size <= max)
792 *target = GNUNET_malloc (md->sbuf_size);
793 memcpy (*target, md->sbuf, md->sbuf_size);
794 return md->sbuf_size;
796 if (0 == (opt & GNUNET_CONTAINER_META_DATA_SERIALIZE_PART))
797 return GNUNET_SYSERR; /* can say that this will fail */
798 /* need to compute a partial serialization, sbuf useless ... */
805 msize += sizeof (struct MetaDataEntry);
806 msize += pos->data_size;
807 if (pos->plugin_name != NULL)
808 msize += strlen (pos->plugin_name) + 1;
809 if (pos->mime_type != NULL)
810 msize += strlen (pos->mime_type) + 1;
813 size = (size_t) msize;
816 GNUNET_break (0); /* integer overflow */
817 return GNUNET_SYSERR;
819 if (size >= GNUNET_MAX_MALLOC_CHECKED)
821 /* too large to be processed */
822 return GNUNET_SYSERR;
824 ent = GNUNET_malloc (size);
825 mdata = (char *) &ent[md->item_count];
826 off = size - (md->item_count * sizeof (struct MetaDataEntry));
831 ent[i].type = htonl ((uint32_t) pos->type);
832 ent[i].format = htonl ((uint32_t) pos->format);
833 ent[i].data_size = htonl ((uint32_t) pos->data_size);
834 if (pos->plugin_name == NULL)
837 plen = strlen (pos->plugin_name) + 1;
838 ent[i].plugin_name_len = htonl ((uint32_t) plen);
839 if (pos->mime_type == NULL)
842 mlen = strlen (pos->mime_type) + 1;
843 ent[i].mime_type_len = htonl ((uint32_t) mlen);
844 off -= pos->data_size;
845 memcpy (&mdata[off], pos->data, pos->data_size);
847 if (pos->plugin_name != NULL)
848 memcpy (&mdata[off], pos->plugin_name, plen);
850 if (pos->mime_type != NULL)
851 memcpy (&mdata[off], pos->mime_type, mlen);
855 GNUNET_assert (off == 0);
865 if (0 == (opt & GNUNET_CONTAINER_META_DATA_SERIALIZE_NO_COMPRESS))
866 comp = try_compression ((const char *) &ent[i], left, &cdata, &clen);
868 if ((md->sbuf == NULL) && (i == 0))
870 /* fill 'sbuf'; this "modifies" md, but since this is only
871 * an internal cache we will cast away the 'const' instead
872 * of making the API look strange. */
873 vmd = (struct GNUNET_CONTAINER_MetaData *) md;
874 hdr = GNUNET_malloc (left + sizeof (struct MetaDataHeader));
875 hdr->size = htonl (left);
876 hdr->entries = htonl (md->item_count);
877 if (GNUNET_YES == comp)
879 GNUNET_assert (clen < left);
880 hdr->version = htonl (2 | HEADER_COMPRESSED);
881 memcpy (&hdr[1], cdata, clen);
882 vmd->sbuf_size = clen + sizeof (struct MetaDataHeader);
886 hdr->version = htonl (2);
887 memcpy (&hdr[1], &ent[0], left);
888 vmd->sbuf_size = left + sizeof (struct MetaDataHeader);
890 vmd->sbuf = (char *) hdr;
893 if (((left + sizeof (struct MetaDataHeader)) <= max) ||
894 ((comp == GNUNET_YES) && (clen <= max)))
896 /* success, this now fits! */
897 if (GNUNET_YES == comp)
900 dst = GNUNET_malloc (clen + sizeof (struct MetaDataHeader));
901 hdr = (struct MetaDataHeader *) dst;
902 hdr->version = htonl (2 | HEADER_COMPRESSED);
903 hdr->size = htonl (left);
904 hdr->entries = htonl (md->item_count - i);
905 memcpy (&dst[sizeof (struct MetaDataHeader)], cdata, clen);
908 rlen = clen + sizeof (struct MetaDataHeader);
913 dst = GNUNET_malloc (left + sizeof (struct MetaDataHeader));
914 hdr = (struct MetaDataHeader *) dst;
915 hdr->version = htonl (2);
916 hdr->entries = htonl (md->item_count - i);
917 hdr->size = htonl (left);
918 memcpy (&dst[sizeof (struct MetaDataHeader)], &ent[i], left);
920 rlen = left + sizeof (struct MetaDataHeader);
924 memcpy (*target, dst, clen + sizeof (struct MetaDataHeader));
934 if (0 == (opt & GNUNET_CONTAINER_META_DATA_SERIALIZE_PART))
938 return GNUNET_SYSERR;
941 /* next iteration: ignore the corresponding meta data at the
942 * end and try again without it */
943 left -= sizeof (struct MetaDataEntry);
944 left -= pos->data_size;
945 if (pos->plugin_name != NULL)
946 left -= strlen (pos->plugin_name) + 1;
947 if (pos->mime_type != NULL)
948 left -= strlen (pos->mime_type) + 1;
954 /* nothing fit, only write header! */
955 ihdr.version = htonl (2);
956 ihdr.entries = htonl (0);
957 ihdr.size = htonl (0);
959 *target = GNUNET_malloc (sizeof (struct MetaDataHeader));
960 memcpy (*target, &ihdr, sizeof (struct MetaDataHeader));
961 return sizeof (struct MetaDataHeader);
966 * Get the size of the full meta-data in serialized form.
968 * @param md metadata to inspect
969 * @return number of bytes needed for serialization, -1 on error
972 GNUNET_CONTAINER_meta_data_get_serialized_size (const struct
973 GNUNET_CONTAINER_MetaData *md)
978 if (md->sbuf != NULL)
979 return md->sbuf_size;
982 GNUNET_CONTAINER_meta_data_serialize (md, &ptr, GNUNET_MAX_MALLOC_CHECKED,
983 GNUNET_CONTAINER_META_DATA_SERIALIZE_FULL);
991 * Decompress input, return the decompressed data
992 * as output, set outputSize to the number of bytes
995 * @param input compressed data
996 * @param inputSize number of bytes in input
997 * @param outputSize expected size of the output
998 * @return NULL on error
1001 decompress (const char *input, size_t inputSize, size_t outputSize)
1007 output = GNUNET_malloc (olen);
1009 uncompress ((Bytef *) output, &olen, (const Bytef *) input, inputSize))
1015 GNUNET_free (output);
1022 * Deserialize meta-data. Initializes md.
1024 * @param input buffer with the serialized metadata
1025 * @param size number of bytes available in input
1026 * @return MD on success, NULL on error (i.e.
1029 struct GNUNET_CONTAINER_MetaData *
1030 GNUNET_CONTAINER_meta_data_deserialize (const char *input, size_t size)
1032 struct GNUNET_CONTAINER_MetaData *md;
1033 struct MetaDataHeader hdr;
1034 struct MetaDataEntry ent;
1047 const char *meta_data;
1048 const char *plugin_name;
1049 const char *mime_type;
1050 enum EXTRACTOR_MetaFormat format;
1052 if (size < sizeof (struct MetaDataHeader))
1054 memcpy (&hdr, input, sizeof (struct MetaDataHeader));
1055 version = ntohl (hdr.version) & HEADER_VERSION_MASK;
1056 compressed = (ntohl (hdr.version) & HEADER_COMPRESSED) != 0;
1059 return NULL; /* null pointer */
1062 GNUNET_break_op (0); /* unsupported version */
1066 ic = ntohl (hdr.entries);
1067 dataSize = ntohl (hdr.size);
1068 if ((sizeof (struct MetaDataEntry) * ic) > dataSize)
1070 GNUNET_break_op (0);
1076 if (dataSize >= GNUNET_MAX_MALLOC_CHECKED)
1078 /* make sure we don't blow our memory limit because of a mal-formed
1080 GNUNET_break_op (0);
1084 decompress ((const char *) &input[sizeof (struct MetaDataHeader)],
1085 size - sizeof (struct MetaDataHeader), dataSize);
1088 GNUNET_break_op (0);
1096 cdata = (const char *) &input[sizeof (struct MetaDataHeader)];
1097 if (dataSize != size - sizeof (struct MetaDataHeader))
1099 GNUNET_break_op (0);
1104 md = GNUNET_CONTAINER_meta_data_create ();
1105 left = dataSize - ic * sizeof (struct MetaDataEntry);
1106 mdata = &cdata[ic * sizeof (struct MetaDataEntry)];
1107 for (i = 0; i < ic; i++)
1109 memcpy (&ent, &cdata[i * sizeof (struct MetaDataEntry)],
1110 sizeof (struct MetaDataEntry));
1111 format = (enum EXTRACTOR_MetaFormat) ntohl (ent.format);
1112 if ((format != EXTRACTOR_METAFORMAT_UTF8) &&
1113 (format != EXTRACTOR_METAFORMAT_C_STRING) &&
1114 (format != EXTRACTOR_METAFORMAT_BINARY))
1116 GNUNET_break_op (0);
1119 dlen = ntohl (ent.data_size);
1120 plen = ntohl (ent.plugin_name_len);
1121 mlen = ntohl (ent.mime_type_len);
1124 GNUNET_break_op (0);
1128 meta_data = &mdata[left];
1129 if ((format == EXTRACTOR_METAFORMAT_UTF8) ||
1130 (format == EXTRACTOR_METAFORMAT_C_STRING))
1132 if ((dlen == 0) || (mdata[left + dlen - 1] != '\0'))
1134 GNUNET_break_op (0);
1140 GNUNET_break_op (0);
1144 if ((plen > 0) && (mdata[left + plen - 1] != '\0'))
1146 GNUNET_break_op (0);
1152 plugin_name = &mdata[left];
1156 GNUNET_break_op (0);
1160 if ((mlen > 0) && (mdata[left + mlen - 1] != '\0'))
1162 GNUNET_break_op (0);
1168 mime_type = &mdata[left];
1169 GNUNET_CONTAINER_meta_data_insert (md, plugin_name,
1170 (enum EXTRACTOR_MetaType)
1171 ntohl (ent.type), format, mime_type,
1174 GNUNET_free_non_null (data);
1179 /* end of container_meta_data.c */