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.
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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>
41 * This is a linked list.
43 struct MetaItem *next;
46 * Name of the extracting plugin.
56 * The actual meta data.
61 * Number of bytes in 'data'.
66 * Type of the meta data.
68 enum EXTRACTOR_MetaType type;
71 * Format of the meta data.
73 enum EXTRACTOR_MetaFormat format;
78 * Meta data to associate with a file, directory or namespace.
80 struct GNUNET_CONTAINER_MetaData
83 * Linked list of the meta data items.
85 struct MetaItem *items;
88 * Complete serialized and compressed buffer of the items.
89 * NULL if we have not computed that buffer yet.
94 * Number of bytes in 'sbuf'. 0 if the buffer is stale.
99 * Number of items in the linked list.
101 unsigned int item_count;
107 * Create a fresh struct CONTAINER_MetaData token.
109 * @return empty meta-data container
111 struct GNUNET_CONTAINER_MetaData *
112 GNUNET_CONTAINER_meta_data_create ()
114 return GNUNET_malloc (sizeof (struct GNUNET_CONTAINER_MetaData));
119 * Free meta data item.
121 * @param item item to free
124 meta_item_free (struct MetaItem *item)
126 GNUNET_free_non_null (item->plugin_name);
127 GNUNET_free_non_null (item->mime_type);
128 GNUNET_free_non_null (item->data);
134 * The meta data has changed, invalidate its serialization
137 * @param md meta data that changed
140 invalidate_sbuf (struct GNUNET_CONTAINER_MetaData *md)
142 if (md->sbuf == NULL)
144 GNUNET_free (md->sbuf);
153 * @param md what to free
156 GNUNET_CONTAINER_meta_data_destroy (struct GNUNET_CONTAINER_MetaData *md)
158 struct MetaItem *item;
162 while (NULL != (item = md->items))
164 md->items = item->next;
165 meta_item_free (item);
167 GNUNET_free_non_null (md->sbuf);
173 * Remove all items in the container.
175 * @param md metadata to manipulate
178 GNUNET_CONTAINER_meta_data_clear (struct GNUNET_CONTAINER_MetaData *md)
180 struct MetaItem *item;
184 while (NULL != (item = md->items))
186 md->items = item->next;
187 meta_item_free (item);
189 GNUNET_free_non_null (md->sbuf);
190 memset (md, 0, sizeof (struct GNUNET_CONTAINER_MetaData));
196 * Test if two MDs are equal. We consider them equal if
197 * the meta types, formats and content match (we do not
198 * include the mime types and plugins names in this
201 * @param md1 first value to check
202 * @param md2 other value to check
203 * @return GNUNET_YES if they are equal
206 GNUNET_CONTAINER_meta_data_test_equal (const struct GNUNET_CONTAINER_MetaData
208 const struct GNUNET_CONTAINER_MetaData
217 if (md1->item_count != md2->item_count)
227 if ((i->type == j->type) &&
228 (i->format == j->format) &&
229 (i->data_size == j->data_size) &&
230 (0 == memcmp (i->data, j->data, i->data_size)))
237 if (found == GNUNET_NO)
246 * Extend metadata. Note that the list of meta data items is
247 * sorted by size (largest first).
249 * @param md metadata to extend
250 * @param plugin_name name of the plugin that produced this value;
251 * special values can be used (i.e. '<zlib>' for zlib being
252 * used in the main libextractor library and yielding
254 * @param type libextractor-type describing the meta data
255 * @param format basic format information about data
256 * @param data_mime_type mime-type of data (not of the original file);
257 * can be NULL (if mime-type is not known)
258 * @param data actual meta-data found
259 * @param data_len number of bytes in data
260 * @return GNUNET_OK on success, GNUNET_SYSERR if this entry already exists
261 * data_mime_type and plugin_name are not considered for "exists" checks
264 GNUNET_CONTAINER_meta_data_insert (struct GNUNET_CONTAINER_MetaData *md,
265 const char *plugin_name,
266 enum EXTRACTOR_MetaType type,
267 enum EXTRACTOR_MetaFormat format,
268 const char *data_mime_type,
269 const char *data, size_t data_len)
271 struct MetaItem *prev;
272 struct MetaItem *pos;
280 if (pos->data_size < data_len)
282 if ((pos->type == type) &&
283 (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,
353 const char *plugin_name,
354 enum EXTRACTOR_MetaType type,
355 enum EXTRACTOR_MetaFormat format,
356 const char *data_mime_type, const char *data, size_t data_len)
358 struct GNUNET_CONTAINER_MetaData *md = cls;
360 (void) GNUNET_CONTAINER_meta_data_insert (md, plugin_name,
362 data_mime_type, data, data_len);
368 * Extend metadata. Merges the meta data from the second argument
369 * into the first, discarding duplicate key-value pairs.
371 * @param md metadata to extend
372 * @param in metadata to merge
375 GNUNET_CONTAINER_meta_data_merge (struct GNUNET_CONTAINER_MetaData *md,
376 const struct GNUNET_CONTAINER_MetaData *in)
378 GNUNET_CONTAINER_meta_data_iterate (in, &merge_helper, md);
385 * @param md metadata to manipulate
386 * @param type type of the item to remove
387 * @param data specific value to remove, NULL to remove all
388 * entries of the given type
389 * @param data_len number of bytes in data
390 * @return GNUNET_OK on success, GNUNET_SYSERR if the item does not exist in md
393 GNUNET_CONTAINER_meta_data_delete (struct GNUNET_CONTAINER_MetaData *md,
394 enum EXTRACTOR_MetaType type,
395 const char *data, size_t data_len)
397 struct MetaItem *pos;
398 struct MetaItem *prev;
404 if ((pos->type == type) &&
406 ((pos->data_size == data_len) &&
407 (0 == memcmp (pos->data, data, data_len)))))
410 md->items = pos->next;
412 prev->next = pos->next;
413 meta_item_free (pos);
415 invalidate_sbuf (md);
421 return GNUNET_SYSERR;
426 * Add the current time as the publication date
429 * @param md metadata to modify
432 GNUNET_CONTAINER_meta_data_add_publication_date (struct
433 GNUNET_CONTAINER_MetaData *md)
436 struct GNUNET_TIME_Absolute t;
438 t = GNUNET_TIME_absolute_get ();
439 GNUNET_CONTAINER_meta_data_delete (md,
440 EXTRACTOR_METATYPE_PUBLICATION_DATE,
442 dat = GNUNET_STRINGS_absolute_time_to_string (t);
443 GNUNET_CONTAINER_meta_data_insert (md,
445 EXTRACTOR_METATYPE_PUBLICATION_DATE,
446 EXTRACTOR_METAFORMAT_UTF8,
447 "text/plain", dat, strlen (dat) + 1);
453 * Iterate over MD entries.
455 * @param md metadata to inspect
456 * @param iter function to call on each entry
457 * @param iter_cls closure for iterator
458 * @return number of entries
461 GNUNET_CONTAINER_meta_data_iterate (const struct
462 GNUNET_CONTAINER_MetaData *md,
463 EXTRACTOR_MetaDataProcessor
464 iter, void *iter_cls)
466 struct MetaItem *pos;
471 return md->item_count;
475 if (0 != iter (iter_cls,
478 pos->format, pos->mime_type, pos->data, pos->data_size))
479 return md->item_count;
482 return md->item_count;
487 * Get the first MD entry of the given type. Caller
488 * is responsible for freeing the return value.
489 * Also, only meta data items that are strings (0-terminated)
490 * are returned by this function.
492 * @param md metadata to inspect
493 * @param type type to look for
494 * @return NULL if no entry was found
497 GNUNET_CONTAINER_meta_data_get_by_type (const struct GNUNET_CONTAINER_MetaData
498 *md, enum EXTRACTOR_MetaType type)
500 struct MetaItem *pos;
507 if ((type == pos->type) &&
508 ((pos->format == EXTRACTOR_METAFORMAT_UTF8) ||
509 (pos->format == EXTRACTOR_METAFORMAT_C_STRING)))
510 return GNUNET_strdup (pos->data);
518 * Get the first matching MD entry of the given types. Caller is
519 * responsible for freeing the return value. Also, only meta data
520 * items that are strings (0-terminated) are returned by this
523 * @param md metadata to inspect
524 * @param ... -1-terminated list of types
525 * @return NULL if we do not have any such entry,
526 * otherwise client is responsible for freeing the value!
529 GNUNET_CONTAINER_meta_data_get_first_by_types (const struct
530 GNUNET_CONTAINER_MetaData *md,
535 enum EXTRACTOR_MetaType type;
543 type = va_arg (args, enum EXTRACTOR_MetaType);
547 ret = GNUNET_CONTAINER_meta_data_get_by_type (md, type);
557 * Get a thumbnail from the meta-data (if present).
559 * @param md metadata to get the thumbnail from
560 * @param thumb will be set to the thumbnail data. Must be
561 * freed by the caller!
562 * @return number of bytes in thumbnail, 0 if not available
565 GNUNET_CONTAINER_meta_data_get_thumbnail (const struct
566 GNUNET_CONTAINER_MetaData * md,
567 unsigned char **thumb)
569 struct MetaItem *pos;
570 struct MetaItem *match;
578 if ((NULL != pos->mime_type) &&
579 (0 == strncasecmp ("image/", pos->mime_type,
580 strlen ("image/"))) &&
581 (pos->format == EXTRACTOR_METAFORMAT_BINARY))
585 else if ((match->type != EXTRACTOR_METATYPE_THUMBNAIL) &&
586 (pos->type == EXTRACTOR_METATYPE_THUMBNAIL))
591 if ((match == NULL) || (match->data_size == 0))
593 *thumb = GNUNET_malloc (match->data_size);
594 memcpy (*thumb, match->data, match->data_size);
595 return match->data_size;
600 * Duplicate struct GNUNET_CONTAINER_MetaData.
602 * @param md what to duplicate
603 * @return duplicate meta-data container
605 struct GNUNET_CONTAINER_MetaData *
606 GNUNET_CONTAINER_meta_data_duplicate (const struct GNUNET_CONTAINER_MetaData
609 struct GNUNET_CONTAINER_MetaData *ret;
610 struct MetaItem *pos;
614 ret = GNUNET_CONTAINER_meta_data_create ();
618 GNUNET_CONTAINER_meta_data_insert (ret,
623 pos->data, pos->data_size);
632 * Try to compress the given block of data.
634 * @param data block to compress; if compression
635 * resulted in a smaller block, the first
636 * bytes of data are updated to the compressed
638 * @param oldSize number of bytes in data
639 * @param result set to the compressed data
640 * @param newSize set to size of result
641 * @return GNUNET_YES if compression reduce the size,
642 * GNUNET_NO if compression did not help
645 try_compression (const char *data,
646 size_t oldSize, char **result, size_t * newSize)
652 dlen = compressBound (oldSize);
654 dlen = oldSize + (oldSize / 100) + 20;
655 /* documentation says 100.1% oldSize + 12 bytes, but we
656 * should be able to overshoot by more to be safe */
658 tmp = GNUNET_malloc (dlen);
659 if (Z_OK == compress2 ((Bytef *) tmp,
660 &dlen, (const Bytef *) data, oldSize, 9))
675 * Flag in 'version' that indicates compressed meta-data.
677 #define HEADER_COMPRESSED 0x80000000
681 * Bits in 'version' that give the version number.
683 #define HEADER_VERSION_MASK 0x7FFFFFFF
687 * Header for serialized meta data.
689 struct MetaDataHeader
692 * The version of the MD serialization. The highest bit is used to
693 * indicate compression.
695 * Version 0 is traditional (pre-0.9) meta data (unsupported)
696 * Version is 1 for a NULL pointer
697 * Version 2 is for 0.9.x (and possibly higher)
698 * Other version numbers are not yet defined.
703 * How many MD entries are there?
708 * Size of the decompressed meta data.
713 * This is followed by 'entries' values of type 'struct MetaDataEntry'
714 * and then by 'entry' plugin names, mime-types and data blocks
715 * as specified in those meta data entries.
721 * Entry of serialized meta data.
726 * Meta data type. Corresponds to an 'enum EXTRACTOR_MetaType'
731 * Meta data format. Corresponds to an 'enum EXTRACTOR_MetaFormat'
736 * Number of bytes of meta data.
741 * Number of bytes in the plugin name including 0-terminator. 0 for NULL.
743 uint32_t plugin_name_len;
746 * Number of bytes in the mime type including 0-terminator. 0 for NULL.
748 uint32_t mime_type_len;
754 * Serialize meta-data to target.
756 * @param md metadata to serialize
757 * @param target where to write the serialized metadata;
758 * *target can be NULL, in which case memory is allocated
759 * @param max maximum number of bytes available in target
760 * @param opt is it ok to just write SOME of the
761 * meta-data to match the size constraint,
762 * possibly discarding some data?
763 * @return number of bytes written on success,
764 * GNUNET_SYSERR on error (typically: not enough
768 GNUNET_CONTAINER_meta_data_serialize (const struct GNUNET_CONTAINER_MetaData
769 *md, char **target, size_t max,
771 GNUNET_CONTAINER_MetaDataSerializationOptions
774 struct GNUNET_CONTAINER_MetaData *vmd;
775 struct MetaItem *pos;
776 struct MetaDataHeader ihdr;
777 struct MetaDataHeader *hdr;
778 struct MetaDataEntry *ent;
793 if (max < sizeof (struct MetaDataHeader))
794 return GNUNET_SYSERR; /* far too small */
798 if (md->sbuf != NULL)
800 /* try to use serialization cache */
801 if (md->sbuf_size <= max)
804 *target = GNUNET_malloc (md->sbuf_size);
805 memcpy (*target, md->sbuf, md->sbuf_size);
806 return md->sbuf_size;
808 if (0 == (opt & GNUNET_CONTAINER_META_DATA_SERIALIZE_PART))
809 return GNUNET_SYSERR; /* can say that this will fail */
810 /* need to compute a partial serialization, sbuf useless ... */
817 msize += sizeof (struct MetaDataEntry);
818 msize += pos->data_size;
819 if (pos->plugin_name != NULL)
820 msize += strlen (pos->plugin_name) + 1;
821 if (pos->mime_type != NULL)
822 msize += strlen (pos->mime_type) + 1;
825 size = (size_t) msize;
828 GNUNET_break (0); /* integer overflow */
829 return GNUNET_SYSERR;
831 if (size >= GNUNET_MAX_MALLOC_CHECKED)
833 /* too large to be processed */
834 return GNUNET_SYSERR;
836 ent = GNUNET_malloc (size);
837 mdata = (char *) &ent[md->item_count];
838 off = size - (md->item_count * sizeof (struct MetaDataEntry));
843 ent[i].type = htonl ((uint32_t) pos->type);
844 ent[i].format = htonl ((uint32_t) pos->format);
845 ent[i].data_size = htonl ((uint32_t) pos->data_size);
846 if (pos->plugin_name == NULL)
849 plen = strlen (pos->plugin_name) + 1;
850 ent[i].plugin_name_len = htonl ((uint32_t) plen);
851 if (pos->mime_type == NULL)
854 mlen = strlen (pos->mime_type) + 1;
855 ent[i].mime_type_len = htonl ((uint32_t) mlen);
856 off -= pos->data_size;
857 memcpy (&mdata[off], pos->data, pos->data_size);
859 if (pos->plugin_name != NULL)
860 memcpy (&mdata[off], pos->plugin_name, plen);
862 if (pos->mime_type != NULL)
863 memcpy (&mdata[off], pos->mime_type, mlen);
867 GNUNET_assert (off == 0);
877 if (0 == (opt & GNUNET_CONTAINER_META_DATA_SERIALIZE_NO_COMPRESS))
878 comp = try_compression ((const char *) &ent[i], left, &cdata, &clen);
880 if ((md->sbuf == NULL) && (i == 0))
882 /* fill 'sbuf'; this "modifies" md, but since this is only
883 * an internal cache we will cast away the 'const' instead
884 * of making the API look strange. */
885 vmd = (struct GNUNET_CONTAINER_MetaData *) md;
886 hdr = GNUNET_malloc (left + sizeof (struct MetaDataHeader));
887 hdr->size = htonl (left);
888 hdr->entries = htonl (md->item_count);
889 if (GNUNET_YES == comp)
891 GNUNET_assert (clen < left);
892 hdr->version = htonl (2 | HEADER_COMPRESSED);
893 memcpy (&hdr[1], cdata, clen);
894 vmd->sbuf_size = clen + sizeof (struct MetaDataHeader);
898 hdr->version = htonl (2);
899 memcpy (&hdr[1], &ent[0], left);
900 vmd->sbuf_size = left + sizeof (struct MetaDataHeader);
902 vmd->sbuf = (char *) hdr;
905 if (((left + sizeof (struct MetaDataHeader)) <= max) ||
906 ((comp == GNUNET_YES) && (clen <= max)))
908 /* success, this now fits! */
909 if (GNUNET_YES == comp)
912 dst = GNUNET_malloc (clen + sizeof (struct MetaDataHeader));
913 hdr = (struct MetaDataHeader *) dst;
914 hdr->version = htonl (2 | HEADER_COMPRESSED);
915 hdr->size = htonl (left);
916 hdr->entries = htonl (md->item_count - i);
917 memcpy (&dst[sizeof (struct MetaDataHeader)], cdata, clen);
920 rlen = clen + sizeof (struct MetaDataHeader);
925 dst = GNUNET_malloc (left + sizeof (struct MetaDataHeader));
926 hdr = (struct MetaDataHeader *) dst;
927 hdr->version = htonl (2);
928 hdr->entries = htonl (md->item_count - i);
929 hdr->size = htonl (left);
930 memcpy (&dst[sizeof (struct MetaDataHeader)], &ent[i], left);
932 rlen = left + sizeof (struct MetaDataHeader);
936 memcpy (*target, dst, clen + sizeof (struct MetaDataHeader));
946 if (0 == (opt & GNUNET_CONTAINER_META_DATA_SERIALIZE_PART))
950 return GNUNET_SYSERR;
953 /* next iteration: ignore the corresponding meta data at the
954 * end and try again without it */
955 left -= sizeof (struct MetaDataEntry);
956 left -= pos->data_size;
957 if (pos->plugin_name != NULL)
958 left -= strlen (pos->plugin_name) + 1;
959 if (pos->mime_type != NULL)
960 left -= strlen (pos->mime_type) + 1;
966 /* nothing fit, only write header! */
967 ihdr.version = htonl (2);
968 ihdr.entries = htonl (0);
969 ihdr.size = htonl (0);
971 *target = GNUNET_malloc (sizeof (struct MetaDataHeader));
972 memcpy (*target, &ihdr, sizeof (struct MetaDataHeader));
973 return sizeof (struct MetaDataHeader);
978 * Get the size of the full meta-data in serialized form.
980 * @param md metadata to inspect
981 * @return number of bytes needed for serialization, -1 on error
984 GNUNET_CONTAINER_meta_data_get_serialized_size (const struct
985 GNUNET_CONTAINER_MetaData *md)
990 if (md->sbuf != NULL)
991 return md->sbuf_size;
993 ret = GNUNET_CONTAINER_meta_data_serialize (md,
995 GNUNET_MAX_MALLOC_CHECKED,
996 GNUNET_CONTAINER_META_DATA_SERIALIZE_FULL);
1004 * Decompress input, return the decompressed data
1005 * as output, set outputSize to the number of bytes
1008 * @param input compressed data
1009 * @param inputSize number of bytes in input
1010 * @param outputSize expected size of the output
1011 * @return NULL on error
1014 decompress (const char *input, size_t inputSize, size_t outputSize)
1020 output = GNUNET_malloc (olen);
1021 if (Z_OK == uncompress ((Bytef *) output,
1022 &olen, (const Bytef *) input, inputSize))
1028 GNUNET_free (output);
1035 * Deserialize meta-data. Initializes md.
1037 * @param input buffer with the serialized metadata
1038 * @param size number of bytes available in input
1039 * @return MD on success, NULL on error (i.e.
1042 struct GNUNET_CONTAINER_MetaData *
1043 GNUNET_CONTAINER_meta_data_deserialize (const char *input, size_t size)
1045 struct GNUNET_CONTAINER_MetaData *md;
1046 struct MetaDataHeader hdr;
1047 struct MetaDataEntry ent;
1060 const char *meta_data;
1061 const char *plugin_name;
1062 const char *mime_type;
1063 enum EXTRACTOR_MetaFormat format;
1065 if (size < sizeof (struct MetaDataHeader))
1067 memcpy (&hdr, input, sizeof (struct MetaDataHeader));
1068 version = ntohl (hdr.version) & HEADER_VERSION_MASK;
1069 compressed = (ntohl (hdr.version) & HEADER_COMPRESSED) != 0;
1072 return NULL; /* null pointer */
1075 GNUNET_break_op (0); /* unsupported version */
1079 ic = ntohl (hdr.entries);
1080 dataSize = ntohl (hdr.size);
1081 if ((sizeof (struct MetaDataEntry) * ic) > dataSize)
1083 GNUNET_break_op (0);
1089 if (dataSize >= GNUNET_MAX_MALLOC_CHECKED)
1091 /* make sure we don't blow our memory limit because of a mal-formed
1093 GNUNET_break_op (0);
1097 decompress ((const char *) &input[sizeof (struct MetaDataHeader)],
1098 size - sizeof (struct MetaDataHeader), dataSize);
1101 GNUNET_break_op (0);
1109 cdata = (const char *) &input[sizeof (struct MetaDataHeader)];
1110 if (dataSize != size - sizeof (struct MetaDataHeader))
1112 GNUNET_break_op (0);
1117 md = GNUNET_CONTAINER_meta_data_create ();
1118 left = dataSize - ic * sizeof (struct MetaDataEntry);
1119 mdata = &cdata[ic * sizeof (struct MetaDataEntry)];
1120 for (i = 0; i < ic; i++)
1123 &cdata[i * sizeof (struct MetaDataEntry)],
1124 sizeof (struct MetaDataEntry));
1125 format = (enum EXTRACTOR_MetaFormat) ntohl (ent.format);
1126 if ((format != EXTRACTOR_METAFORMAT_UTF8) &&
1127 (format != EXTRACTOR_METAFORMAT_C_STRING) &&
1128 (format != EXTRACTOR_METAFORMAT_BINARY))
1130 GNUNET_break_op (0);
1133 dlen = ntohl (ent.data_size);
1134 plen = ntohl (ent.plugin_name_len);
1135 mlen = ntohl (ent.mime_type_len);
1138 GNUNET_break_op (0);
1142 meta_data = &mdata[left];
1143 if ((format == EXTRACTOR_METAFORMAT_UTF8) ||
1144 (format == EXTRACTOR_METAFORMAT_C_STRING))
1146 if ((dlen == 0) || (mdata[left + dlen - 1] != '\0'))
1148 GNUNET_break_op (0);
1154 GNUNET_break_op (0);
1158 if ((plen > 0) && (mdata[left + plen - 1] != '\0'))
1160 GNUNET_break_op (0);
1166 plugin_name = &mdata[left];
1170 GNUNET_break_op (0);
1174 if ((mlen > 0) && (mdata[left + mlen - 1] != '\0'))
1176 GNUNET_break_op (0);
1182 mime_type = &mdata[left];
1183 GNUNET_CONTAINER_meta_data_insert (md,
1185 (enum EXTRACTOR_MetaType)
1186 ntohl (ent.type), format, mime_type,
1189 GNUNET_free_non_null (data);
1194 /* end of container_meta_data.c */