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.
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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) && (i->format == j->format) &&
228 (i->data_size == j->data_size) &&
229 (0 == memcmp (i->data, j->data, i->data_size)))
236 if (found == GNUNET_NO)
245 * Extend metadata. Note that the list of meta data items is
246 * sorted by size (largest first).
248 * @param md metadata to extend
249 * @param plugin_name name of the plugin that produced this value;
250 * special values can be used (i.e. '<zlib>' for zlib being
251 * used in the main libextractor library and yielding
253 * @param type libextractor-type describing the meta data
254 * @param format basic format information about data
255 * @param data_mime_type mime-type of data (not of the original file);
256 * can be NULL (if mime-type is not known)
257 * @param data actual meta-data found
258 * @param data_len number of bytes in data
259 * @return GNUNET_OK on success, GNUNET_SYSERR if this entry already exists
260 * data_mime_type and plugin_name are not considered for "exists" checks
263 GNUNET_CONTAINER_meta_data_insert (struct GNUNET_CONTAINER_MetaData *md,
264 const char *plugin_name,
265 enum EXTRACTOR_MetaType type,
266 enum EXTRACTOR_MetaFormat format,
267 const char *data_mime_type, const char *data,
270 struct MetaItem *prev;
271 struct MetaItem *pos;
279 if (pos->data_size < data_len)
281 if ((pos->type == type) && (pos->data_size == data_len) &&
282 (0 == memcmp (pos->data, data, data_len)))
284 if ((pos->mime_type == NULL) && (data_mime_type != NULL))
286 pos->mime_type = GNUNET_strdup (data_mime_type);
287 invalidate_sbuf (md);
289 if ((pos->format == EXTRACTOR_METAFORMAT_C_STRING) &&
290 (format == EXTRACTOR_METAFORMAT_UTF8))
292 pos->format = EXTRACTOR_METAFORMAT_UTF8;
293 invalidate_sbuf (md);
295 return GNUNET_SYSERR;
301 i = GNUNET_malloc (sizeof (struct MetaItem));
304 i->data_size = data_len;
311 (data_mime_type == NULL) ? NULL : GNUNET_strdup (data_mime_type);
312 i->plugin_name = (plugin_name == NULL) ? NULL : GNUNET_strdup (plugin_name);
313 i->data = GNUNET_malloc (data_len);
314 memcpy (i->data, data, data_len);
315 /* change OS native dir separators to unix '/' and others to '_' */
316 if (type == EXTRACTOR_METATYPE_FILENAME)
319 while ((*p != '\0') && (p < i->data + data_len))
321 if (*p == DIR_SEPARATOR)
328 invalidate_sbuf (md);
334 * Merge given meta data.
336 * @param cls the 'struct GNUNET_CONTAINER_MetaData' to merge into
337 * @param plugin_name name of the plugin that produced this value;
338 * special values can be used (i.e. '<zlib>' for zlib being
339 * used in the main libextractor library and yielding
341 * @param type libextractor-type describing the meta data
342 * @param format basic format information about data
343 * @param data_mime_type mime-type of data (not of the original file);
344 * can be NULL (if mime-type is not known)
345 * @param data actual meta-data found
346 * @param data_len number of bytes in data
347 * @return 0 (to continue)
350 merge_helper (void *cls, const char *plugin_name, enum EXTRACTOR_MetaType type,
351 enum EXTRACTOR_MetaFormat format, const char *data_mime_type,
352 const char *data, size_t data_len)
354 struct GNUNET_CONTAINER_MetaData *md = cls;
356 (void) GNUNET_CONTAINER_meta_data_insert (md, plugin_name, type, format,
357 data_mime_type, data, data_len);
363 * Extend metadata. Merges the meta data from the second argument
364 * into the first, discarding duplicate key-value pairs.
366 * @param md metadata to extend
367 * @param in metadata to merge
370 GNUNET_CONTAINER_meta_data_merge (struct GNUNET_CONTAINER_MetaData *md,
371 const struct GNUNET_CONTAINER_MetaData *in)
373 GNUNET_CONTAINER_meta_data_iterate (in, &merge_helper, md);
380 * @param md metadata to manipulate
381 * @param type type of the item to remove
382 * @param data specific value to remove, NULL to remove all
383 * entries of the given type
384 * @param data_len number of bytes in data
385 * @return GNUNET_OK on success, GNUNET_SYSERR if the item does not exist in md
388 GNUNET_CONTAINER_meta_data_delete (struct GNUNET_CONTAINER_MetaData *md,
389 enum EXTRACTOR_MetaType type,
390 const char *data, size_t data_len)
392 struct MetaItem *pos;
393 struct MetaItem *prev;
399 if ((pos->type == type) &&
401 ((pos->data_size == data_len) &&
402 (0 == memcmp (pos->data, data, data_len)))))
405 md->items = pos->next;
407 prev->next = pos->next;
408 meta_item_free (pos);
410 invalidate_sbuf (md);
416 return GNUNET_SYSERR;
421 * Add the current time as the publication date
424 * @param md metadata to modify
427 GNUNET_CONTAINER_meta_data_add_publication_date (struct
428 GNUNET_CONTAINER_MetaData *md)
431 struct GNUNET_TIME_Absolute t;
433 t = GNUNET_TIME_absolute_get ();
434 GNUNET_CONTAINER_meta_data_delete (md, EXTRACTOR_METATYPE_PUBLICATION_DATE,
436 dat = GNUNET_STRINGS_absolute_time_to_string (t);
437 GNUNET_CONTAINER_meta_data_insert (md, "<gnunet>",
438 EXTRACTOR_METATYPE_PUBLICATION_DATE,
439 EXTRACTOR_METAFORMAT_UTF8, "text/plain",
440 dat, strlen (dat) + 1);
446 * Iterate over MD entries.
448 * @param md metadata to inspect
449 * @param iter function to call on each entry
450 * @param iter_cls closure for iterator
451 * @return number of entries
454 GNUNET_CONTAINER_meta_data_iterate (const struct GNUNET_CONTAINER_MetaData *md,
455 EXTRACTOR_MetaDataProcessor iter,
458 struct MetaItem *pos;
463 return md->item_count;
468 iter (iter_cls, pos->plugin_name, pos->type, pos->format,
469 pos->mime_type, pos->data, pos->data_size))
470 return md->item_count;
473 return md->item_count;
478 * Get the first MD entry of the given type. Caller
479 * is responsible for freeing the return value.
480 * Also, only meta data items that are strings (0-terminated)
481 * are returned by this function.
483 * @param md metadata to inspect
484 * @param type type to look for
485 * @return NULL if no entry was found
488 GNUNET_CONTAINER_meta_data_get_by_type (const struct GNUNET_CONTAINER_MetaData
489 *md, enum EXTRACTOR_MetaType type)
491 struct MetaItem *pos;
498 if ((type == pos->type) &&
499 ((pos->format == EXTRACTOR_METAFORMAT_UTF8) ||
500 (pos->format == EXTRACTOR_METAFORMAT_C_STRING)))
501 return GNUNET_strdup (pos->data);
509 * Get the first matching MD entry of the given types. Caller is
510 * responsible for freeing the return value. Also, only meta data
511 * items that are strings (0-terminated) are returned by this
514 * @param md metadata to inspect
515 * @param ... -1-terminated list of types
516 * @return NULL if we do not have any such entry,
517 * otherwise client is responsible for freeing the value!
520 GNUNET_CONTAINER_meta_data_get_first_by_types (const struct
521 GNUNET_CONTAINER_MetaData *md,
526 enum EXTRACTOR_MetaType type;
534 type = va_arg (args, enum EXTRACTOR_MetaType);
538 ret = GNUNET_CONTAINER_meta_data_get_by_type (md, type);
548 * Get a thumbnail from the meta-data (if present).
550 * @param md metadata to get the thumbnail from
551 * @param thumb will be set to the thumbnail data. Must be
552 * freed by the caller!
553 * @return number of bytes in thumbnail, 0 if not available
556 GNUNET_CONTAINER_meta_data_get_thumbnail (const struct GNUNET_CONTAINER_MetaData
557 * md, unsigned char **thumb)
559 struct MetaItem *pos;
560 struct MetaItem *match;
568 if ((NULL != pos->mime_type) &&
569 (0 == strncasecmp ("image/", pos->mime_type, strlen ("image/"))) &&
570 (pos->format == EXTRACTOR_METAFORMAT_BINARY))
574 else if ((match->type != EXTRACTOR_METATYPE_THUMBNAIL) &&
575 (pos->type == EXTRACTOR_METATYPE_THUMBNAIL))
580 if ((match == NULL) || (match->data_size == 0))
582 *thumb = GNUNET_malloc (match->data_size);
583 memcpy (*thumb, match->data, match->data_size);
584 return match->data_size;
589 * Duplicate struct GNUNET_CONTAINER_MetaData.
591 * @param md what to duplicate
592 * @return duplicate meta-data container
594 struct GNUNET_CONTAINER_MetaData *
595 GNUNET_CONTAINER_meta_data_duplicate (const struct GNUNET_CONTAINER_MetaData
598 struct GNUNET_CONTAINER_MetaData *ret;
599 struct MetaItem *pos;
603 ret = GNUNET_CONTAINER_meta_data_create ();
607 GNUNET_CONTAINER_meta_data_insert (ret, pos->plugin_name, pos->type,
608 pos->format, pos->mime_type, pos->data,
618 * Try to compress the given block of data.
620 * @param data block to compress; if compression
621 * resulted in a smaller block, the first
622 * bytes of data are updated to the compressed
624 * @param oldSize number of bytes in data
625 * @param result set to the compressed data
626 * @param newSize set to size of result
627 * @return GNUNET_YES if compression reduce the size,
628 * GNUNET_NO if compression did not help
631 try_compression (const char *data, size_t oldSize, char **result,
638 dlen = compressBound (oldSize);
640 dlen = oldSize + (oldSize / 100) + 20;
641 /* documentation says 100.1% oldSize + 12 bytes, but we
642 * should be able to overshoot by more to be safe */
644 tmp = GNUNET_malloc (dlen);
646 compress2 ((Bytef *) tmp, &dlen, (const Bytef *) data, oldSize, 9))
661 * Flag in 'version' that indicates compressed meta-data.
663 #define HEADER_COMPRESSED 0x80000000
667 * Bits in 'version' that give the version number.
669 #define HEADER_VERSION_MASK 0x7FFFFFFF
673 * Header for serialized meta data.
675 struct MetaDataHeader
678 * The version of the MD serialization. The highest bit is used to
679 * indicate compression.
681 * Version 0 is traditional (pre-0.9) meta data (unsupported)
682 * Version is 1 for a NULL pointer
683 * Version 2 is for 0.9.x (and possibly higher)
684 * Other version numbers are not yet defined.
689 * How many MD entries are there?
694 * Size of the decompressed meta data.
699 * This is followed by 'entries' values of type 'struct MetaDataEntry'
700 * and then by 'entry' plugin names, mime-types and data blocks
701 * as specified in those meta data entries.
707 * Entry of serialized meta data.
712 * Meta data type. Corresponds to an 'enum EXTRACTOR_MetaType'
717 * Meta data format. Corresponds to an 'enum EXTRACTOR_MetaFormat'
722 * Number of bytes of meta data.
727 * Number of bytes in the plugin name including 0-terminator. 0 for NULL.
729 uint32_t plugin_name_len;
732 * Number of bytes in the mime type including 0-terminator. 0 for NULL.
734 uint32_t mime_type_len;
740 * Serialize meta-data to target.
742 * @param md metadata to serialize
743 * @param target where to write the serialized metadata;
744 * *target can be NULL, in which case memory is allocated
745 * @param max maximum number of bytes available in target
746 * @param opt is it ok to just write SOME of the
747 * meta-data to match the size constraint,
748 * possibly discarding some data?
749 * @return number of bytes written on success,
750 * GNUNET_SYSERR on error (typically: not enough
754 GNUNET_CONTAINER_meta_data_serialize (const struct GNUNET_CONTAINER_MetaData
755 *md, char **target, size_t max,
757 GNUNET_CONTAINER_MetaDataSerializationOptions
760 struct GNUNET_CONTAINER_MetaData *vmd;
761 struct MetaItem *pos;
762 struct MetaDataHeader ihdr;
763 struct MetaDataHeader *hdr;
764 struct MetaDataEntry *ent;
779 if (max < sizeof (struct MetaDataHeader))
780 return GNUNET_SYSERR; /* far too small */
784 if (md->sbuf != NULL)
786 /* try to use serialization cache */
787 if (md->sbuf_size <= max)
790 *target = GNUNET_malloc (md->sbuf_size);
791 memcpy (*target, md->sbuf, md->sbuf_size);
792 return md->sbuf_size;
794 if (0 == (opt & GNUNET_CONTAINER_META_DATA_SERIALIZE_PART))
795 return GNUNET_SYSERR; /* can say that this will fail */
796 /* need to compute a partial serialization, sbuf useless ... */
803 msize += sizeof (struct MetaDataEntry);
804 msize += pos->data_size;
805 if (pos->plugin_name != NULL)
806 msize += strlen (pos->plugin_name) + 1;
807 if (pos->mime_type != NULL)
808 msize += strlen (pos->mime_type) + 1;
811 size = (size_t) msize;
814 GNUNET_break (0); /* integer overflow */
815 return GNUNET_SYSERR;
817 if (size >= GNUNET_MAX_MALLOC_CHECKED)
819 /* too large to be processed */
820 return GNUNET_SYSERR;
822 ent = GNUNET_malloc (size);
823 mdata = (char *) &ent[md->item_count];
824 off = size - (md->item_count * sizeof (struct MetaDataEntry));
829 ent[i].type = htonl ((uint32_t) pos->type);
830 ent[i].format = htonl ((uint32_t) pos->format);
831 ent[i].data_size = htonl ((uint32_t) pos->data_size);
832 if (pos->plugin_name == NULL)
835 plen = strlen (pos->plugin_name) + 1;
836 ent[i].plugin_name_len = htonl ((uint32_t) plen);
837 if (pos->mime_type == NULL)
840 mlen = strlen (pos->mime_type) + 1;
841 ent[i].mime_type_len = htonl ((uint32_t) mlen);
842 off -= pos->data_size;
843 memcpy (&mdata[off], pos->data, pos->data_size);
845 if (pos->plugin_name != NULL)
846 memcpy (&mdata[off], pos->plugin_name, plen);
848 if (pos->mime_type != NULL)
849 memcpy (&mdata[off], pos->mime_type, mlen);
853 GNUNET_assert (off == 0);
863 if (0 == (opt & GNUNET_CONTAINER_META_DATA_SERIALIZE_NO_COMPRESS))
864 comp = try_compression ((const char *) &ent[i], left, &cdata, &clen);
866 if ((md->sbuf == NULL) && (i == 0))
868 /* fill 'sbuf'; this "modifies" md, but since this is only
869 * an internal cache we will cast away the 'const' instead
870 * of making the API look strange. */
871 vmd = (struct GNUNET_CONTAINER_MetaData *) md;
872 hdr = GNUNET_malloc (left + sizeof (struct MetaDataHeader));
873 hdr->size = htonl (left);
874 hdr->entries = htonl (md->item_count);
875 if (GNUNET_YES == comp)
877 GNUNET_assert (clen < left);
878 hdr->version = htonl (2 | HEADER_COMPRESSED);
879 memcpy (&hdr[1], cdata, clen);
880 vmd->sbuf_size = clen + sizeof (struct MetaDataHeader);
884 hdr->version = htonl (2);
885 memcpy (&hdr[1], &ent[0], left);
886 vmd->sbuf_size = left + sizeof (struct MetaDataHeader);
888 vmd->sbuf = (char *) hdr;
891 if (((left + sizeof (struct MetaDataHeader)) <= max) ||
892 ((comp == GNUNET_YES) && (clen <= max)))
894 /* success, this now fits! */
895 if (GNUNET_YES == comp)
898 dst = GNUNET_malloc (clen + sizeof (struct MetaDataHeader));
899 hdr = (struct MetaDataHeader *) dst;
900 hdr->version = htonl (2 | HEADER_COMPRESSED);
901 hdr->size = htonl (left);
902 hdr->entries = htonl (md->item_count - i);
903 memcpy (&dst[sizeof (struct MetaDataHeader)], cdata, clen);
906 rlen = clen + sizeof (struct MetaDataHeader);
911 dst = GNUNET_malloc (left + sizeof (struct MetaDataHeader));
912 hdr = (struct MetaDataHeader *) dst;
913 hdr->version = htonl (2);
914 hdr->entries = htonl (md->item_count - i);
915 hdr->size = htonl (left);
916 memcpy (&dst[sizeof (struct MetaDataHeader)], &ent[i], left);
918 rlen = left + sizeof (struct MetaDataHeader);
922 memcpy (*target, dst, clen + sizeof (struct MetaDataHeader));
932 if (0 == (opt & GNUNET_CONTAINER_META_DATA_SERIALIZE_PART))
936 return GNUNET_SYSERR;
939 /* next iteration: ignore the corresponding meta data at the
940 * end and try again without it */
941 left -= sizeof (struct MetaDataEntry);
942 left -= pos->data_size;
943 if (pos->plugin_name != NULL)
944 left -= strlen (pos->plugin_name) + 1;
945 if (pos->mime_type != NULL)
946 left -= strlen (pos->mime_type) + 1;
952 /* nothing fit, only write header! */
953 ihdr.version = htonl (2);
954 ihdr.entries = htonl (0);
955 ihdr.size = htonl (0);
957 *target = GNUNET_malloc (sizeof (struct MetaDataHeader));
958 memcpy (*target, &ihdr, sizeof (struct MetaDataHeader));
959 return sizeof (struct MetaDataHeader);
964 * Get the size of the full meta-data in serialized form.
966 * @param md metadata to inspect
967 * @return number of bytes needed for serialization, -1 on error
970 GNUNET_CONTAINER_meta_data_get_serialized_size (const struct
971 GNUNET_CONTAINER_MetaData *md)
976 if (md->sbuf != NULL)
977 return md->sbuf_size;
980 GNUNET_CONTAINER_meta_data_serialize (md, &ptr, GNUNET_MAX_MALLOC_CHECKED,
981 GNUNET_CONTAINER_META_DATA_SERIALIZE_FULL);
989 * Decompress input, return the decompressed data
990 * as output, set outputSize to the number of bytes
993 * @param input compressed data
994 * @param inputSize number of bytes in input
995 * @param outputSize expected size of the output
996 * @return NULL on error
999 decompress (const char *input, size_t inputSize, size_t outputSize)
1005 output = GNUNET_malloc (olen);
1007 uncompress ((Bytef *) output, &olen, (const Bytef *) input, inputSize))
1013 GNUNET_free (output);
1020 * Deserialize meta-data. Initializes md.
1022 * @param input buffer with the serialized metadata
1023 * @param size number of bytes available in input
1024 * @return MD on success, NULL on error (i.e.
1027 struct GNUNET_CONTAINER_MetaData *
1028 GNUNET_CONTAINER_meta_data_deserialize (const char *input, size_t size)
1030 struct GNUNET_CONTAINER_MetaData *md;
1031 struct MetaDataHeader hdr;
1032 struct MetaDataEntry ent;
1045 const char *meta_data;
1046 const char *plugin_name;
1047 const char *mime_type;
1048 enum EXTRACTOR_MetaFormat format;
1050 if (size < sizeof (struct MetaDataHeader))
1052 memcpy (&hdr, input, sizeof (struct MetaDataHeader));
1053 version = ntohl (hdr.version) & HEADER_VERSION_MASK;
1054 compressed = (ntohl (hdr.version) & HEADER_COMPRESSED) != 0;
1057 return NULL; /* null pointer */
1060 GNUNET_break_op (0); /* unsupported version */
1064 ic = ntohl (hdr.entries);
1065 dataSize = ntohl (hdr.size);
1066 if ((sizeof (struct MetaDataEntry) * ic) > dataSize)
1068 GNUNET_break_op (0);
1074 if (dataSize >= GNUNET_MAX_MALLOC_CHECKED)
1076 /* make sure we don't blow our memory limit because of a mal-formed
1078 GNUNET_break_op (0);
1082 decompress ((const char *) &input[sizeof (struct MetaDataHeader)],
1083 size - sizeof (struct MetaDataHeader), dataSize);
1086 GNUNET_break_op (0);
1094 cdata = (const char *) &input[sizeof (struct MetaDataHeader)];
1095 if (dataSize != size - sizeof (struct MetaDataHeader))
1097 GNUNET_break_op (0);
1102 md = GNUNET_CONTAINER_meta_data_create ();
1103 left = dataSize - ic * sizeof (struct MetaDataEntry);
1104 mdata = &cdata[ic * sizeof (struct MetaDataEntry)];
1105 for (i = 0; i < ic; i++)
1107 memcpy (&ent, &cdata[i * sizeof (struct MetaDataEntry)],
1108 sizeof (struct MetaDataEntry));
1109 format = (enum EXTRACTOR_MetaFormat) ntohl (ent.format);
1110 if ((format != EXTRACTOR_METAFORMAT_UTF8) &&
1111 (format != EXTRACTOR_METAFORMAT_C_STRING) &&
1112 (format != EXTRACTOR_METAFORMAT_BINARY))
1114 GNUNET_break_op (0);
1117 dlen = ntohl (ent.data_size);
1118 plen = ntohl (ent.plugin_name_len);
1119 mlen = ntohl (ent.mime_type_len);
1122 GNUNET_break_op (0);
1126 meta_data = &mdata[left];
1127 if ((format == EXTRACTOR_METAFORMAT_UTF8) ||
1128 (format == EXTRACTOR_METAFORMAT_C_STRING))
1130 if ((dlen == 0) || (mdata[left + dlen - 1] != '\0'))
1132 GNUNET_break_op (0);
1138 GNUNET_break_op (0);
1142 if ((plen > 0) && (mdata[left + plen - 1] != '\0'))
1144 GNUNET_break_op (0);
1150 plugin_name = &mdata[left];
1154 GNUNET_break_op (0);
1158 if ((mlen > 0) && (mdata[left + mlen - 1] != '\0'))
1160 GNUNET_break_op (0);
1166 mime_type = &mdata[left];
1167 GNUNET_CONTAINER_meta_data_insert (md, plugin_name,
1168 (enum EXTRACTOR_MetaType)
1169 ntohl (ent.type), format, mime_type,
1172 GNUNET_free_non_null (data);
1177 /* end of container_meta_data.c */