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3 (C) 2004, 2005, 2006, 2007, 2008, 2009 Christian Grothoff (and other contributing authors)
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21 * @file include/gnunet_fs_service.h
22 * @brief API for file-sharing via GNUnet
23 * @author Christian Grothoff
26 * - extend API with support for publish simulation (-s)
27 * and URI-argument binding to keyword/namespace (-u)
29 #ifndef GNUNET_FS_LIB_H
30 #define GNUNET_FS_LIB_H
32 #include "gnunet_util_lib.h"
37 #if 0 /* keep Emacsens' auto-indent happy */
43 * Version number of the implementation.
46 * 1.x.x: initial version with triple GNUNET_hash and merkle tree
47 * 2.x.x: root node with mime-type, filename and version number
48 * 2.1.x: combined GNUNET_EC_ContentHashKey/3HASH encoding with 25:1 super-nodes
49 * 2.2.x: with directories
50 * 3.0.x: with namespaces
51 * 3.1.x: with namespace meta-data
52 * 3.2.x: with collections
53 * 4.0.x: with expiration, variable meta-data, kblocks
54 * 4.1.x: with new error and configuration handling
55 * 5.0.x: with location URIs
56 * 6.0.0: with support for OR in KSKs
57 * 6.1.x: with simplified namespace support
58 * 9.0.0: CPS-style integrated API
60 #define GNUNET_FS_VERSION 0x00090000
63 /* ******************** URI API *********************** */
65 #define GNUNET_FS_URI_PREFIX "gnunet://fs/"
66 #define GNUNET_FS_URI_KSK_INFIX "ksk/"
67 #define GNUNET_FS_URI_SKS_INFIX "sks/"
68 #define GNUNET_FS_URI_CHK_INFIX "chk/"
69 #define GNUNET_FS_URI_LOC_INFIX "loc/"
73 * A Universal Resource Identifier (URI), opaque.
79 * Iterator over keywords
82 * @param keyword the keyword
83 * @param is_mandatory is the keyword mandatory (in a search)
84 * @return GNUNET_OK to continue to iterate, GNUNET_SYSERR to abort
86 typedef int (*GNUNET_FS_KeywordIterator) (void *cls,
91 * Get a unique key from a URI. This is for putting URIs
92 * into HashMaps. The key may change between FS implementations.
94 * @param uri uri to convert to a unique key
95 * @param key wherer to store the unique key
98 GNUNET_FS_uri_to_key (const struct GNUNET_FS_Uri *uri,
99 GNUNET_HashCode * key);
102 * Convert a URI to a UTF-8 String.
104 * @param uri uri to convert to a string
105 * @return the UTF-8 string
108 GNUNET_FS_uri_to_string (const struct GNUNET_FS_Uri *uri);
111 * Convert keyword URI to a human readable format
112 * (i.e. the search query that was used in the first place)
114 * @param uri ksk uri to convert to a string
115 * @return string with the keywords
118 GNUNET_FS_uri_ksk_to_string_fancy (const struct GNUNET_FS_Uri *uri);
122 * Convert a UTF-8 String to a URI.
124 * @param uri string to parse
125 * @param emsg where to store the parser error message (if any)
126 * @return NULL on error
128 struct GNUNET_FS_Uri *
129 GNUNET_FS_uri_parse (const char *uri,
135 * @param uri uri to free
138 GNUNET_FS_uri_destroy (struct GNUNET_FS_Uri *uri);
142 * How many keywords are ANDed in this keyword URI?
144 * @param uri ksk uri to get the number of keywords from
145 * @return 0 if this is not a keyword URI
148 GNUNET_FS_uri_ksk_get_keyword_count (const struct GNUNET_FS_Uri *uri);
152 * Iterate over all keywords in this keyword URI.
154 * @param uri ksk uri to get the keywords from
155 * @param iterator function to call on each keyword
156 * @param iterator_cls closure for iterator
157 * @return -1 if this is not a keyword URI, otherwise number of
158 * keywords iterated over until iterator aborted
161 GNUNET_FS_uri_ksk_get_keywords (const struct GNUNET_FS_Uri *uri,
162 GNUNET_FS_KeywordIterator iterator,
167 * Obtain the identity of the peer offering the data
169 * @param uri the location URI to inspect
170 * @param peer where to store the identify of the peer (presumably) offering the content
171 * @return GNUNET_SYSERR if this is not a location URI, otherwise GNUNET_OK
174 GNUNET_FS_uri_loc_get_peer_identity (const struct GNUNET_FS_Uri *uri,
175 struct GNUNET_PeerIdentity * peer);
179 * Obtain the URI of the content itself.
181 * @param uri location URI to get the content URI from
182 * @return NULL if argument is not a location URI
184 struct GNUNET_FS_Uri *
185 GNUNET_FS_uri_loc_get_uri (const struct GNUNET_FS_Uri *uri);
189 * Obtain the expiration of the LOC URI.
191 * @param uri location URI to get the expiration from
192 * @return expiration time of the URI
194 struct GNUNET_TIME_Absolute
195 GNUNET_FS_uri_loc_get_expiration (const struct GNUNET_FS_Uri *uri);
199 * Construct a location URI (this peer will be used for the location).
201 * @param baseUri content offered by the sender
202 * @param cfg configuration information (used to find our hostkey)
203 * @param expiration_time how long will the content be offered?
204 * @return the location URI, NULL on error
206 struct GNUNET_FS_Uri *
207 GNUNET_FS_uri_loc_create (const struct GNUNET_FS_Uri *baseUri,
208 struct GNUNET_CONFIGURATION_Handle *cfg,
209 struct GNUNET_TIME_Absolute expiration_time);
213 * Canonicalize keyword URI. Performs operations such
214 * as decapitalization and removal of certain characters.
215 * (useful for search).
217 * @param uri the URI to canonicalize
218 * @return canonicalized version of the URI, NULL on error
220 struct GNUNET_FS_Uri *
221 GNUNET_FS_uri_ksk_canonicalize (const struct GNUNET_FS_Uri *uri);
225 * Merge the sets of keywords from two KSK URIs.
226 * (useful for merging the canonicalized keywords with
227 * the original keywords for sharing).
229 * @param u1 first uri
230 * @param u2 second uri
231 * @return merged URI, NULL on error
233 struct GNUNET_FS_Uri *
234 GNUNET_FS_uri_ksk_merge (const struct GNUNET_FS_Uri *u1,
235 const struct GNUNET_FS_Uri *u2);
241 * @param uri the URI to duplicate
242 * @return copy of the URI
244 struct GNUNET_FS_Uri *
245 GNUNET_FS_uri_dup (const struct GNUNET_FS_Uri *uri);
249 * Create an FS URI from a single user-supplied string of keywords.
250 * The string is broken up at spaces into individual keywords.
251 * Keywords that start with "+" are mandatory. Double-quotes can
252 * be used to prevent breaking up strings at spaces (and also
253 * to specify non-mandatory keywords starting with "+").
255 * Keywords must contain a balanced number of double quotes and
256 * double quotes can not be used in the actual keywords (for
257 * example, the string '""foo bar""' will be turned into two
258 * "OR"ed keywords 'foo' and 'bar', not into '"foo bar"'.
260 * @param keywords the keyword string
261 * @param emsg where to store an error message
262 * @return an FS URI for the given keywords, NULL
263 * if keywords is not legal (i.e. empty).
265 struct GNUNET_FS_Uri *
266 GNUNET_FS_uri_ksk_create (const char *keywords,
271 * Create an FS URI from a user-supplied command line of keywords.
272 * Arguments should start with "+" to indicate mandatory
275 * @param argc number of keywords
276 * @param argv keywords (double quotes are not required for
277 * keywords containing spaces; however, double
278 * quotes are required for keywords starting with
279 * "+"); there is no mechanism for having double
280 * quotes in the actual keywords (if the user
281 * did specifically specify double quotes, the
282 * caller should convert each double quote
283 * into two single quotes).
284 * @return an FS URI for the given keywords, NULL
285 * if keywords is not legal (i.e. empty).
287 struct GNUNET_FS_Uri *
288 GNUNET_FS_uri_ksk_create_from_args (unsigned int argc,
293 * Test if two URIs are equal.
295 * @param u1 one of the URIs
296 * @param u2 the other URI
297 * @return GNUNET_YES if the URIs are equal
300 GNUNET_FS_uri_test_equal (const struct GNUNET_FS_Uri *u1,
301 const struct GNUNET_FS_Uri *u2);
305 * Is this a namespace URI?
307 * @param uri the uri to check
308 * @return GNUNET_YES if this is an SKS uri
311 GNUNET_FS_uri_test_sks (const struct GNUNET_FS_Uri *uri);
315 * Handle to one of our namespaces.
317 struct GNUNET_FS_Namespace;
321 * Create an SKS URI from a namespace and an identifier.
323 * @param ns namespace
324 * @param id identifier
325 * @param emsg where to store an error message
326 * @return an FS URI for the given namespace and identifier
328 struct GNUNET_FS_Uri *
329 GNUNET_FS_uri_sks_create (struct GNUNET_FS_Namespace *ns,
335 * Get the ID of a namespace from the given
338 * @param uri the uri to get the namespace ID from
339 * @param nsid where to store the ID of the namespace
340 * @return GNUNET_OK on success
343 GNUNET_FS_uri_sks_get_namespace (const struct GNUNET_FS_Uri *uri,
344 GNUNET_HashCode * nsid);
348 * Get the content identifier of an SKS URI.
350 * @param uri the sks uri
351 * @return NULL on error (not a valid SKS URI)
354 GNUNET_FS_uri_sks_get_content_id (const struct GNUNET_FS_Uri *uri);
358 * Convert namespace URI to a human readable format
359 * (using the namespace description, if available).
361 * @param cfg configuration to use
362 * @param uri SKS uri to convert
363 * @return NULL on error (not an SKS URI)
366 GNUNET_FS_uri_sks_to_string_fancy (struct GNUNET_CONFIGURATION_Handle *cfg,
367 const struct GNUNET_FS_Uri *uri);
371 * Is this a keyword URI?
374 * @return GNUNET_YES if this is a KSK uri
377 GNUNET_FS_uri_test_ksk (const struct GNUNET_FS_Uri *uri);
381 * Is this a file (or directory) URI?
383 * @param uri the uri to check
384 * @return GNUNET_YES if this is a CHK uri
387 GNUNET_FS_uri_test_chk (const struct GNUNET_FS_Uri *uri);
391 * What is the size of the file that this URI
394 * @param uri the CHK (or LOC) URI to inspect
395 * @return size of the file as specified in the CHK URI
398 GNUNET_FS_uri_chk_get_file_size (const struct GNUNET_FS_Uri *uri);
402 * Is this a location URI?
404 * @param uri the uri to check
405 * @return GNUNET_YES if this is a LOC uri
408 GNUNET_FS_uri_test_loc (const struct GNUNET_FS_Uri *uri);
412 * Construct a keyword-URI from meta-data (take all entries
413 * in the meta-data and construct one large keyword URI
414 * that lists all keywords that can be found in the meta-data).
416 * @param md metadata to use
417 * @return NULL on error, otherwise a KSK URI
419 struct GNUNET_FS_Uri *
420 GNUNET_FS_uri_ksk_create_from_meta_data (const struct GNUNET_CONTAINER_MetaData *md);
423 /* ******************** command-line option parsing API *********************** */
426 * Command-line option parser function that allows the user
427 * to specify one or more '-k' options with keywords. Each
428 * specified keyword will be added to the URI. A pointer to
429 * the URI must be passed as the "scls" argument.
431 * @param ctx command line processor context
432 * @param scls must be of type "struct GNUNET_FS_Uri **"
433 * @param option name of the option (typically 'k')
434 * @param value command line argument given
435 * @return GNUNET_OK on success
438 GNUNET_FS_getopt_set_keywords (struct GNUNET_GETOPT_CommandLineProcessorContext* ctx,
445 * Command-line option parser function that allows the user to specify
446 * one or more '-m' options with metadata. Each specified entry of
447 * the form "type=value" will be added to the metadata. A pointer to
448 * the metadata must be passed as the "scls" argument.
450 * @param ctx command line processor context
451 * @param scls must be of type "struct GNUNET_CONTAINER_MetaData **"
452 * @param option name of the option (typically 'k')
453 * @param value command line argument given
454 * @return GNUNET_OK on success
457 GNUNET_FS_getopt_set_metadata (struct GNUNET_GETOPT_CommandLineProcessorContext* ctx,
464 /* ************************* sharing API ***************** */
468 * Possible status codes used in the callback for the
469 * various file-sharing operations. On each file (or search),
470 * the callback is guaranteed to be called once with "START"
471 * and once with STOPPED; calls with PROGRESS, ERROR or COMPLETED
472 * are optional and depend on the circumstances; parent operations
473 * will be STARTED before child-operations and STOPPED after
474 * their respective child-operations. START and STOP signals
475 * are typically generated either due to explicit client requests
476 * or because of suspend/resume operations.
478 enum GNUNET_FS_Status
481 * Notification that we have started to publish a file structure.
483 GNUNET_FS_STATUS_PUBLISH_START,
486 * Notification that we have resumed sharing a file structure.
488 GNUNET_FS_STATUS_PUBLISH_RESUME,
491 * Notification that we have suspended sharing a file structure.
493 GNUNET_FS_STATUS_PUBLISH_SUSPEND,
496 * Notification that we are making progress sharing a file structure.
498 GNUNET_FS_STATUS_PUBLISH_PROGRESS,
501 * Notification that an error was encountered sharing a file structure.
502 * The application will continue to receive resume/suspend events for
503 * this structure until "GNUNET_FS_publish_stop" is called.
505 GNUNET_FS_STATUS_PUBLISH_ERROR,
508 * Notification that we completed sharing a file structure.
509 * The application will continue to receive resume/suspend events for
510 * this structure until "GNUNET_FS_publish_stop" is called.
512 GNUNET_FS_STATUS_PUBLISH_COMPLETED,
515 * Notification that we have stopped
516 * the process of uploading a file structure; no
517 * futher events will be generated for this action.
519 GNUNET_FS_STATUS_PUBLISH_STOPPED,
522 * Notification that we have started this download.
524 GNUNET_FS_STATUS_DOWNLOAD_START,
527 * Notification that this download is being resumed.
529 GNUNET_FS_STATUS_DOWNLOAD_RESUME,
532 * Notification that this download was suspended.
534 GNUNET_FS_STATUS_DOWNLOAD_SUSPEND,
537 * Notification about progress with this download.
539 GNUNET_FS_STATUS_DOWNLOAD_PROGRESS,
542 * Notification that this download encountered an error.
544 GNUNET_FS_STATUS_DOWNLOAD_ERROR,
547 * Notification that this download completed. Note that for
548 * directories, completion does not imply completion of all files in
551 GNUNET_FS_STATUS_DOWNLOAD_COMPLETED,
554 * Notification that this download was stopped
555 * (final event with respect to this action).
557 GNUNET_FS_STATUS_DOWNLOAD_STOPPED,
560 * Notification that this download is now actively being
561 * pursued (as opposed to waiting in the queue).
563 GNUNET_FS_STATUS_DOWNLOAD_ACTIVE,
566 * Notification that this download is no longer actively
567 * being pursued (back in the queue).
569 GNUNET_FS_STATUS_DOWNLOAD_INACTIVE,
572 * Notification that this download is no longer part of a
573 * recursive download or search but now a 'stand-alone'
574 * download (and may thus need to be moved in the GUI
575 * into a different category).
577 GNUNET_FS_STATUS_DOWNLOAD_LOST_PARENT,
580 * First event generated when a client requests
581 * a search to begin or when a namespace result
582 * automatically triggers the search for updates.
584 GNUNET_FS_STATUS_SEARCH_START,
587 * Last event when a search is being resumed;
588 * note that "GNUNET_FS_SEARCH_START" will not
589 * be generated in this case.
591 GNUNET_FS_STATUS_SEARCH_RESUME,
594 * Event generated for each search result
595 * when the respective search is resumed.
597 GNUNET_FS_STATUS_SEARCH_RESUME_RESULT,
600 * Last event when a search is being suspended;
601 * note that "GNUNET_FS_SEARCH_STOPPED" will not
602 * be generated in this case.
604 GNUNET_FS_STATUS_SEARCH_SUSPEND,
607 * Event generated for each search result
608 * when the respective search is suspended.
610 GNUNET_FS_STATUS_SEARCH_SUSPEND_RESULT,
613 * This search has yielded a result.
615 GNUNET_FS_STATUS_SEARCH_RESULT,
618 * We have discovered a new namespace.
620 GNUNET_FS_STATUS_SEARCH_RESULT_NAMESPACE,
623 * We have additional data about the quality
624 * or availability of a search result.
626 GNUNET_FS_STATUS_SEARCH_UPDATE,
629 * Signals a problem with this search.
631 GNUNET_FS_STATUS_SEARCH_ERROR,
634 * Signals that this search was paused.
636 GNUNET_FS_STATUS_SEARCH_PAUSED,
639 * Signals that this search was continued (unpaused).
641 GNUNET_FS_STATUS_SEARCH_CONTINUED,
644 * Event generated for each search result
645 * when the respective search is stopped.
647 GNUNET_FS_STATUS_SEARCH_RESULT_STOPPED,
650 * Event generated for each search result
651 * when the respective search is suspended.
653 GNUNET_FS_STATUS_SEARCH_RESULT_SUSPEND,
656 * Last message from a search; this signals
657 * that there will be no further events associated
660 GNUNET_FS_STATUS_SEARCH_STOPPED,
663 * Notification that we started to unindex a file.
665 GNUNET_FS_STATUS_UNINDEX_START,
668 * Notification that we resumed unindexing of a file.
670 GNUNET_FS_STATUS_UNINDEX_RESUME,
673 * Notification that we suspended unindexing a file.
675 GNUNET_FS_STATUS_UNINDEX_SUSPEND,
678 * Notification that we made progress unindexing a file.
680 GNUNET_FS_STATUS_UNINDEX_PROGRESS,
683 * Notification that we encountered an error unindexing
686 GNUNET_FS_STATUS_UNINDEX_ERROR,
689 * Notification that the unindexing of this file
692 GNUNET_FS_STATUS_UNINDEX_COMPLETED,
695 * Notification that the unindexing of this file
696 * was stopped (final event for this action).
698 GNUNET_FS_STATUS_UNINDEX_STOPPED
704 * Handle for controlling an upload.
706 struct GNUNET_FS_PublishContext;
710 * Handle for controlling an unindexing operation.
712 struct GNUNET_FS_UnindexContext;
716 * Handle for controlling a search.
718 struct GNUNET_FS_SearchContext;
722 * Result from a search. Opaque handle to refer to the search
723 * (typically used when starting a download associated with the search
726 struct GNUNET_FS_SearchResult;
730 * Context for controlling a download.
732 struct GNUNET_FS_DownloadContext;
736 * Handle for detail information about a file that is being publishd.
737 * Specifies metadata, keywords, how to get the contents of the file
738 * (i.e. data-buffer in memory, filename on disk) and other options.
740 struct GNUNET_FS_FileInformation;
744 * Argument given to the progress callback with
745 * information about what is going on.
747 struct GNUNET_FS_ProgressInfo
751 * Values that depend on the event type.
756 * Values for all "GNUNET_FS_STATUS_PUBLISH_*" events.
761 * Context for controlling the upload.
763 struct GNUNET_FS_PublishContext *sc;
766 * Information about the file that is being publishd.
768 const struct GNUNET_FS_FileInformation *fi;
771 * Client context pointer (set the last time by the client for
772 * this operation; initially NULL on START/RESUME events).
777 * Client context pointer for the parent operation
778 * (if this is a file in a directory or a subdirectory).
783 * Name of the file being published; can be NULL.
785 const char *filename;
788 * How large is the file overall? For directories,
789 * this is only the size of the directory itself,
790 * not of the other files contained within the
796 * At what time do we expect to finish the upload?
797 * (will be a value in the past for completed
800 struct GNUNET_TIME_Relative eta;
803 * How long has this upload been actively running
804 * (excludes times where the upload was suspended).
806 struct GNUNET_TIME_Relative duration;
809 * How many bytes have we completed?
814 * What anonymity level is used for this upload?
819 * Additional values for specific events.
824 * These values are only valid for
825 * GNUNET_FS_STATUS_PUBLISH_PROGRESS events.
830 * Data block we just published.
835 * At what offset in the file is "data"?
840 * Length of the data block.
845 * Depth of the given block in the tree;
846 * 0 would be the highest level (the first
847 * call is guaranteed to be for the lowest
855 * These values are only valid for
856 * GNUNET_FS_STATUS_PUBLISH_RESUME events.
861 * Error message, NULL if no error was encountered so far.
866 * URI of the file (if the download had been completed)
868 const struct GNUNET_FS_Uri *chk_uri;
873 * These values are only valid for
874 * GNUNET_FS_STATUS_PUBLISH_COMPLETED events.
881 const struct GNUNET_FS_Uri *chk_uri;
886 * These values are only valid for
887 * GNUNET_FS_STATUS_PUBLISH_ERROR events.
892 * Error message, never NULL.
904 * Values for all "GNUNET_FS_STATUS_DOWNLOAD_*" events.
909 * Context for controlling the download.
911 struct GNUNET_FS_DownloadContext *dc;
914 * Client context pointer (set the last time
915 * by the client for this operation; initially
916 * NULL on START/RESUME events).
921 * Client context pointer for the parent operation
922 * (if this is a file in a directory or a subdirectory).
927 * Client context pointer for the associated search operation
928 * (specifically, context pointer for the specific search
929 * result, not the overall search); only set if this
930 * download was started from a search result.
935 * URI used for this download.
937 const struct GNUNET_FS_Uri *uri;
940 * Name of the file that we are downloading.
942 const char *filename;
945 * How large is the download overall? This
946 * is NOT necessarily the size from the
947 * URI since we may be doing a partial download.
952 * At what time do we expect to finish the download?
953 * (will be a value in the past for completed
956 struct GNUNET_TIME_Relative eta;
959 * How long has this download been active?
961 struct GNUNET_TIME_Relative duration;
964 * How many bytes have we completed?
969 * What anonymity level is used for this download?
974 * Additional values for specific events.
979 * These values are only valid for
980 * GNUNET_FS_STATUS_DOWNLOAD_PROGRESS events.
985 * Data block we just obtained.
990 * At what offset in the file is "data"?
995 * Length of the data block.
1000 * Depth of the given block in the tree;
1001 * 0 would be the highest level (the first
1002 * call is guaranteed to be for the lowest
1010 * These values are only valid for
1011 * GNUNET_FS_STATUS_DOWNLOAD_START events.
1016 * Known metadata for the download.
1018 const struct GNUNET_CONTAINER_MetaData *meta;
1023 * These values are only valid for
1024 * GNUNET_FS_STATUS_DOWNLOAD_RESUME events.
1029 * Known metadata for the download.
1031 const struct GNUNET_CONTAINER_MetaData *meta;
1034 * Error message, NULL if we have not encountered any error yet.
1036 const char *message;
1041 * These values are only valid for
1042 * GNUNET_FS_STATUS_DOWNLOAD_ERROR events.
1049 const char *message;
1058 * Values for all "GNUNET_FS_STATUS_SEARCH_*" events.
1063 * Context for controlling the search, NULL for
1064 * searches that were not explicitly triggered
1065 * by the client (i.e., searches for updates in
1068 struct GNUNET_FS_SearchContext *sc;
1071 * Client context pointer (set the last time by the client for
1072 * this operation; initially NULL on START/RESUME events). Note
1073 * that this value can only be set on START/RESUME; returning
1074 * non-NULL on RESULT/RESUME_RESULT will actually update the
1075 * private context for "UPDATE" events.
1080 * Client parent-context pointer; NULL for top-level searches,
1081 * non-NULL for automatically triggered searches for updates in
1087 * What query is used for this search
1088 * (list of keywords or SKS identifier).
1090 const struct GNUNET_FS_Uri *query;
1093 * How long has this search been actively running
1094 * (excludes times where the search was paused or
1097 struct GNUNET_TIME_Relative duration;
1100 * What anonymity level is used for this search?
1105 * Additional values for specific events.
1110 * These values are only valid for
1111 * GNUNET_FS_STATUS_SEARCH_RESULT events.
1116 * Metadata for the search result.
1118 const struct GNUNET_CONTAINER_MetaData *meta;
1121 * URI for the search result.
1123 const struct GNUNET_FS_Uri *uri;
1126 * Handle to the result (for starting downloads).
1128 struct GNUNET_FS_SearchResult *result;
1133 * These values are only valid for
1134 * GNUNET_FS_STATUS_SEARCH_RESUME_RESULT events.
1139 * Metadata for the search result.
1141 const struct GNUNET_CONTAINER_MetaData *meta;
1144 * URI for the search result.
1146 const struct GNUNET_FS_Uri *uri;
1149 * Handle to the result (for starting downloads).
1151 struct GNUNET_FS_SearchResult *result;
1154 * Current availability rank (negative:
1155 * unavailable, positive: available)
1157 int32_t availability_rank;
1160 * On how many total queries is the given
1161 * availability_rank based?
1163 uint32_t availability_certainty;
1166 * Updated applicability rank (the larger,
1167 * the better the result fits the search
1170 uint32_t applicability_rank;
1175 * These values are only valid for
1176 * GNUNET_FS_STATUS_SEARCH_UPDATE events.
1181 * Private context set for for this result
1182 * during the "RESULT" event.
1187 * Metadata for the search result.
1189 const struct GNUNET_CONTAINER_MetaData *meta;
1192 * URI for the search result.
1194 const struct GNUNET_FS_Uri *uri;
1197 * Current availability rank (negative:
1198 * unavailable, positive: available)
1200 int32_t availability_rank;
1203 * On how many total queries is the given
1204 * availability_rank based?
1206 uint32_t availability_certainty;
1209 * Updated applicability rank (the larger,
1210 * the better the result fits the search
1213 uint32_t applicability_rank;
1218 * These values are only valid for
1219 * GNUNET_FS_STATUS_SEARCH_RESULT_SUSPEND events.
1220 * These events are automatically triggered for
1221 * each search result before the
1222 * GNUNET_FS_STATUS_SEARCH_SUSPEND event. This
1223 * happens primarily to give the client a chance
1224 * to clean up the "cctx" (if needed).
1229 * Private context set for for this result
1230 * during the "RESULT" event.
1235 * Metadata for the search result.
1237 const struct GNUNET_CONTAINER_MetaData *meta;
1240 * URI for the search result.
1242 const struct GNUNET_FS_Uri *uri;
1247 * These values are only valid for
1248 * GNUNET_FS_STATUS_SEARCH_RESULT_STOPPED events.
1249 * These events are automatically triggered for
1250 * each search result before the
1251 * GNUNET_FS_STATUS_SEARCH_STOPPED event. This
1252 * happens primarily to give the client a chance
1253 * to clean up the "cctx" (if needed).
1258 * Private context set for for this result
1259 * during the "RESULT" event.
1264 * Metadata for the search result.
1266 const struct GNUNET_CONTAINER_MetaData *meta;
1269 * URI for the search result.
1271 const struct GNUNET_FS_Uri *uri;
1276 * These values are only valid for
1277 * GNUNET_FS_STATUS_SEARCH_RESUME events.
1282 * Error message, NULL if we have not encountered any error yet.
1284 const char *message;
1287 * Is this search currently paused?
1294 * These values are only valid for
1295 * GNUNET_FS_STATUS_SEARCH_ERROR events.
1302 const char *message;
1307 * Values for all "GNUNET_FS_STATUS_SEARCH_RESULT_NAMESPACE" events.
1312 * Handle to the namespace (NULL if it is not a local
1315 struct GNUNET_FS_Namespace *ns;
1318 * Short, human-readable name of the namespace.
1323 * Root identifier for the namespace, can be NULL.
1328 * Metadata for the namespace.
1330 const struct GNUNET_CONTAINER_MetaData *meta;
1333 * Hash-identifier for the namespace.
1344 * Values for all "GNUNET_FS_STATUS_UNINDEX_*" events.
1349 * Context for controlling the unindexing.
1351 struct GNUNET_FS_UnindexContext *uc;
1354 * Client context pointer (set the last time
1355 * by the client for this operation; initially
1356 * NULL on START/RESUME events).
1361 * Name of the file that is being unindexed.
1363 const char *filename;
1366 * How large is the file overall?
1371 * At what time do we expect to finish unindexing?
1372 * (will be a value in the past for completed
1373 * unindexing opeations).
1375 struct GNUNET_TIME_Relative eta;
1378 * How long has this upload been actively running
1379 * (excludes times where the upload was suspended).
1381 struct GNUNET_TIME_Relative duration;
1384 * How many bytes have we completed?
1389 * Additional values for specific events.
1394 * These values are only valid for
1395 * GNUNET_FS_STATUS_UNINDEX_PROGRESS events.
1400 * Data block we just unindexed.
1405 * At what offset in the file is "data"?
1410 * Length of the data block.
1415 * Depth of the given block in the tree;
1416 * 0 would be the highest level (the first
1417 * call is guaranteed to be for the lowest
1425 * These values are only valid for
1426 * GNUNET_FS_STATUS_UNINDEX_RESUME events.
1431 * Error message, NULL if we have not encountered any error yet.
1433 const char *message;
1438 * These values are only valid for
1439 * GNUNET_FS_STATUS_UNINDEX_ERROR events.
1446 const char *message;
1457 * Specific status code (determines the event type).
1459 enum GNUNET_FS_Status status;
1465 * Notification of FS to a client about the progress of an
1466 * operation. Callbacks of this type will be used for uploads,
1467 * downloads and searches. Some of the arguments depend a bit
1468 * in their meaning on the context in which the callback is used.
1470 * @param cls closure
1471 * @param info details about the event, specifying the event type
1472 * and various bits about the event
1473 * @return client-context (for the next progress call
1474 * for this operation; should be set to NULL for
1475 * SUSPEND and STOPPED events). The value returned
1476 * will be passed to future callbacks in the respective
1477 * field in the GNUNET_FS_ProgressInfo struct.
1479 typedef void* (*GNUNET_FS_ProgressCallback)
1481 const struct GNUNET_FS_ProgressInfo *info);
1485 * General (global) option flags for file-sharing.
1487 enum GNUNET_FS_Flags
1490 * No special flags set.
1492 GNUNET_FS_FLAGS_NONE = 0,
1495 * Is persistence of operations desired?
1496 * (will create SUSPEND/RESUME events).
1498 GNUNET_FS_FLAGS_PERSISTENCE = 1,
1501 * Should we automatically trigger probes for search results
1502 * to determine availability?
1503 * (will create GNUNET_FS_STATUS_SEARCH_UPDATE events).
1505 GNUNET_FS_FLAGS_DO_PROBES = 2
1510 * Options specified in the VARARGs portion of GNUNET_FS_start.
1512 enum GNUNET_FS_OPTIONS
1516 * Last option in the VARARG list.
1518 GNUNET_FS_OPTIONS_END = 0,
1521 * Select the desired amount of parallelism (this option should be
1522 * followed by an "unsigned int" giving the desired maximum number
1523 * of parallel downloads).
1525 GNUNET_FS_OPTIONS_DOWNLOAD_PARALLELISM = 1,
1528 * Maximum number of requests that should be pending at a given
1529 * point in time (invidivual downloads may go above this, but
1530 * if we are above this threshold, we should not activate any
1531 * additional downloads.
1533 GNUNET_FS_OPTIONS_REQUEST_PARALLELISM = 2
1539 * Handle to the file-sharing service.
1541 struct GNUNET_FS_Handle;
1545 * Setup a connection to the file-sharing service.
1547 * @param sched scheduler to use
1548 * @param cfg configuration to use
1549 * @param client_name unique identifier for this client
1550 * @param upcb function to call to notify about FS actions
1551 * @param upcb_cls closure for upcb
1552 * @param flags specific attributes for fs-operations
1553 * @param ... list of optional options, terminated with GNUNET_FS_OPTIONS_END
1554 * @return NULL on error
1556 struct GNUNET_FS_Handle *
1557 GNUNET_FS_start (struct GNUNET_SCHEDULER_Handle *sched,
1558 const struct GNUNET_CONFIGURATION_Handle *cfg,
1559 const char *client_name,
1560 GNUNET_FS_ProgressCallback upcb,
1562 enum GNUNET_FS_Flags flags,
1567 * Close our connection with the file-sharing service.
1568 * The callback given to GNUNET_FS_start will no longer be
1569 * called after this function returns.
1571 * @param h handle that was returned from GNUNET_FS_start
1574 GNUNET_FS_stop (struct GNUNET_FS_Handle *h);
1578 * Function called on entries in a GNUNET_FS_FileInformation publish-structure.
1580 * @param cls closure
1581 * @param fi the entry in the publish-structure
1582 * @param length length of the file or directory
1583 * @param meta metadata for the file or directory (can be modified)
1584 * @param uri pointer to the keywords that will be used for this entry (can be modified)
1585 * @param anonymity pointer to selected anonymity level (can be modified)
1586 * @param priority pointer to selected priority (can be modified)
1587 * @param expirationTime pointer to selected expiration time (can be modified)
1588 * @param client_info pointer to client context set upon creation (can be modified)
1589 * @return GNUNET_OK to continue, GNUNET_NO to remove
1590 * this entry from the directory, GNUNET_SYSERR
1591 * to abort the iteration
1593 typedef int (*GNUNET_FS_FileInformationProcessor)(void *cls,
1594 struct GNUNET_FS_FileInformation *fi,
1596 struct GNUNET_CONTAINER_MetaData *meta,
1597 struct GNUNET_FS_Uri **uri,
1598 uint32_t *anonymity,
1600 struct GNUNET_TIME_Absolute *expirationTime,
1601 void **client_info);
1605 * Obtain the name under which this file information
1606 * structure is stored on disk. Only works for top-level
1607 * file information structures.
1609 * @param s structure to get the filename for
1610 * @return NULL on error, otherwise filename that
1611 * can be passed to "GNUNET_FS_file_information_recover"
1612 * to read this fi-struct from disk.
1615 GNUNET_FS_file_information_get_id (struct GNUNET_FS_FileInformation *s);
1620 * Create an entry for a file in a publish-structure.
1622 * @param h handle to the file sharing subsystem
1623 * @param client_info initial client-info value for this entry
1624 * @param filename name of the file or directory to publish
1625 * @param keywords under which keywords should this file be available
1626 * directly; can be NULL
1627 * @param meta metadata for the file
1628 * @param do_index GNUNET_YES for index, GNUNET_NO for insertion,
1629 * GNUNET_SYSERR for simulation
1630 * @param anonymity what is the desired anonymity level for sharing?
1631 * @param priority what is the priority for OUR node to
1632 * keep this file available? Use 0 for maximum anonymity and
1633 * minimum reliability...
1634 * @param expirationTime when should this content expire?
1635 * @return publish structure entry for the file
1637 struct GNUNET_FS_FileInformation *
1638 GNUNET_FS_file_information_create_from_file (struct GNUNET_FS_Handle *h,
1640 const char *filename,
1641 const struct GNUNET_FS_Uri *keywords,
1642 const struct GNUNET_CONTAINER_MetaData *meta,
1646 struct GNUNET_TIME_Absolute expirationTime);
1650 * Create an entry for a file in a publish-structure.
1652 * @param h handle to the file sharing subsystem
1653 * @param client_info initial client-info value for this entry
1654 * @param length length of the file
1655 * @param data data for the file (should not be used afterwards by
1656 * the caller; callee will "free")
1657 * @param keywords under which keywords should this file be available
1658 * directly; can be NULL
1659 * @param meta metadata for the file
1660 * @param do_index GNUNET_YES for index, GNUNET_NO for insertion,
1661 * GNUNET_SYSERR for simulation
1662 * @param anonymity what is the desired anonymity level for sharing?
1663 * @param priority what is the priority for OUR node to
1664 * keep this file available? Use 0 for maximum anonymity and
1665 * minimum reliability...
1666 * @param expirationTime when should this content expire?
1667 * @return publish structure entry for the file
1669 struct GNUNET_FS_FileInformation *
1670 GNUNET_FS_file_information_create_from_data (struct GNUNET_FS_Handle *h,
1674 const struct GNUNET_FS_Uri *keywords,
1675 const struct GNUNET_CONTAINER_MetaData *meta,
1679 struct GNUNET_TIME_Absolute expirationTime);
1683 * Function that provides data.
1685 * @param cls closure
1686 * @param offset offset to read from; it is possible
1687 * that the caller might need to go backwards
1689 * @param max maximum number of bytes that should be
1690 * copied to buf; readers are not allowed
1691 * to provide less data unless there is an error;
1692 * a value of "0" will be used at the end to allow
1693 * the reader to clean up its internal state
1694 * @param buf where the reader should write the data
1695 * @param emsg location for the reader to store an error message
1696 * @return number of bytes written, usually "max", 0 on error
1698 typedef size_t (*GNUNET_FS_DataReader)(void *cls,
1706 * Create an entry for a file in a publish-structure.
1708 * @param h handle to the file sharing subsystem
1709 * @param client_info initial client-info value for this entry
1710 * @param length length of the file
1711 * @param reader function that can be used to obtain the data for the file
1712 * @param reader_cls closure for "reader"
1713 * @param keywords under which keywords should this file be available
1714 * directly; can be NULL
1715 * @param meta metadata for the file
1716 * @param do_index GNUNET_YES for index, GNUNET_NO for insertion,
1717 * GNUNET_SYSERR for simulation
1718 * @param anonymity what is the desired anonymity level for sharing?
1719 * @param priority what is the priority for OUR node to
1720 * keep this file available? Use 0 for maximum anonymity and
1721 * minimum reliability...
1722 * @param expirationTime when should this content expire?
1723 * @return publish structure entry for the file
1725 struct GNUNET_FS_FileInformation *
1726 GNUNET_FS_file_information_create_from_reader (struct GNUNET_FS_Handle *h,
1729 GNUNET_FS_DataReader reader,
1731 const struct GNUNET_FS_Uri *keywords,
1732 const struct GNUNET_CONTAINER_MetaData *meta,
1736 struct GNUNET_TIME_Absolute expirationTime);
1740 * Function that a "GNUNET_FS_DirectoryScanner" should call
1741 * for each entry in the directory.
1743 * @param cls closure
1744 * @param filename name of the file (including path); must end
1745 * in a "/" (even on W32) if this is a directory
1746 * @param fi information about the file (should not be
1747 * used henceforth by the caller)
1749 typedef void (*GNUNET_FS_FileProcessor)(void *cls,
1750 const char *filename,
1751 struct GNUNET_FS_FileInformation *fi);
1755 * Type of a function that will be used to scan a directory.
1757 * @param cls closure
1758 * @param h handle to the file sharing subsystem
1759 * @param dirname name of the directory to scan
1760 * @param do_index should files be indexed or inserted
1761 * @param anonymity desired anonymity level
1762 * @param priority priority for publishing
1763 * @param expirationTime expiration for publication
1764 * @param proc function to call on each entry
1765 * @param proc_cls closure for proc
1766 * @param emsg where to store an error message (on errors)
1767 * @return GNUNET_OK on success
1769 typedef int (*GNUNET_FS_DirectoryScanner)(void *cls,
1770 struct GNUNET_FS_Handle *h,
1771 const char *dirname,
1775 struct GNUNET_TIME_Absolute expirationTime,
1776 GNUNET_FS_FileProcessor proc,
1783 * Simple, useful default implementation of a directory scanner
1784 * (GNUNET_FS_DirectoryScanner). This implementation expects to get a
1785 * UNIX filename, will publish all files in the directory except hidden
1786 * files (those starting with a "."). Metadata will be extracted
1787 * using GNU libextractor; the specific list of plugins should be
1788 * specified in "cls", passing NULL will disable (!) metadata
1789 * extraction. Keywords will be derived from the metadata and be
1790 * subject to default canonicalization. This is strictly a
1791 * convenience function.
1793 * @param cls must be of type "struct EXTRACTOR_Extractor*"
1794 * @param h handle to the file sharing subsystem
1795 * @param dirname name of the directory to scan
1796 * @param do_index should files be indexed or inserted
1797 * @param anonymity desired anonymity level
1798 * @param priority priority for publishing
1799 * @param expirationTime expiration for publication
1800 * @param proc function called on each entry
1801 * @param proc_cls closure for proc
1802 * @param emsg where to store an error message (on errors)
1803 * @return GNUNET_OK on success
1806 GNUNET_FS_directory_scanner_default (void *cls,
1807 struct GNUNET_FS_Handle *h,
1808 const char *dirname,
1812 struct GNUNET_TIME_Absolute expirationTime,
1813 GNUNET_FS_FileProcessor proc,
1819 * Create a publish-structure from an existing file hierarchy, inferring
1820 * and organizing keywords and metadata as much as possible. This
1821 * function primarily performs the recursive build and re-organizes
1822 * keywords and metadata; for automatically getting metadata
1823 * extraction, scanning of directories and creation of the respective
1824 * GNUNET_FS_FileInformation entries the default scanner should be
1825 * passed (GNUNET_FS_directory_scanner_default). This is strictly a
1826 * convenience function.
1828 * @param h handle to the file sharing subsystem
1829 * @param client_info initial client-info value for this entry
1830 * @param filename name of the top-level file or directory
1831 * @param scanner function used to get a list of files in a directory
1832 * @param scanner_cls closure for scanner
1833 * @param do_index should files in the hierarchy be indexed?
1834 * @param anonymity what is the desired anonymity level for sharing?
1835 * @param priority what is the priority for OUR node to
1836 * keep this file available? Use 0 for maximum anonymity and
1837 * minimum reliability...
1838 * @param expirationTime when should this content expire?
1839 * @param emsg where to store an error message
1840 * @return publish structure entry for the directory, NULL on error
1842 struct GNUNET_FS_FileInformation *
1843 GNUNET_FS_file_information_create_from_directory (struct GNUNET_FS_Handle *h,
1845 const char *filename,
1846 GNUNET_FS_DirectoryScanner scanner,
1851 struct GNUNET_TIME_Absolute expirationTime,
1856 * Create an entry for an empty directory in a publish-structure.
1857 * This function should be used by applications for which the
1858 * use of "GNUNET_FS_file_information_create_from_directory"
1859 * is not appropriate.
1861 * @param h handle to the file sharing subsystem
1862 * @param client_info initial client-info value for this entry
1863 * @param keywords under which keywords should this directory be available
1864 * directly; can be NULL
1865 * @param meta metadata for the directory
1866 * @param anonymity what is the desired anonymity level for sharing?
1867 * @param priority what is the priority for OUR node to
1868 * keep this file available? Use 0 for maximum anonymity and
1869 * minimum reliability...
1870 * @param expirationTime when should this content expire?
1871 * @return publish structure entry for the directory , NULL on error
1873 struct GNUNET_FS_FileInformation *
1874 GNUNET_FS_file_information_create_empty_directory (struct GNUNET_FS_Handle *h,
1876 const struct GNUNET_FS_Uri *keywords,
1877 const struct GNUNET_CONTAINER_MetaData *meta,
1880 struct GNUNET_TIME_Absolute expirationTime);
1884 * Add an entry to a directory in a publish-structure. Clients
1885 * should never modify publish structures that were passed to
1886 * "GNUNET_FS_publish_start" already.
1888 * @param dir the directory
1889 * @param ent the entry to add; the entry must not have been
1890 * added to any other directory at this point and
1891 * must not include "dir" in its structure
1892 * @return GNUNET_OK on success, GNUNET_SYSERR on error
1895 GNUNET_FS_file_information_add (struct GNUNET_FS_FileInformation *dir,
1896 struct GNUNET_FS_FileInformation *ent);
1900 * Inspect a file or directory in a publish-structure. Clients
1901 * should never modify publish structures that were passed to
1902 * "GNUNET_FS_publish_start" already. When called on a directory,
1903 * this function will FIRST call "proc" with information about
1904 * the directory itself and then for each of the files in the
1905 * directory (but not for files in subdirectories). When called
1906 * on a file, "proc" will be called exactly once (with information
1907 * about the specific file).
1909 * @param dir the directory
1910 * @param proc function to call on each entry
1911 * @param proc_cls closure for proc
1914 GNUNET_FS_file_information_inspect (struct GNUNET_FS_FileInformation *dir,
1915 GNUNET_FS_FileInformationProcessor proc,
1920 * Destroy publish-structure. Clients should never destroy publish
1921 * structures that were passed to "GNUNET_FS_publish_start" already.
1923 * @param fi structure to destroy
1924 * @param cleaner function to call on each entry in the structure
1925 * (useful to clean up client_info); can be NULL; return
1926 * values are ignored
1927 * @param cleaner_cls closure for cleaner
1930 GNUNET_FS_file_information_destroy (struct GNUNET_FS_FileInformation *fi,
1931 GNUNET_FS_FileInformationProcessor cleaner,
1936 * Options for publishing. Compatible options
1937 * can be OR'ed together.
1939 enum GNUNET_FS_PublishOptions
1942 * No options (use defaults for everything).
1944 GNUNET_FS_PUBLISH_OPTION_NONE = 0,
1947 * Simulate publishing. With this option, no data will be stored
1948 * in the datastore. Useful for computing URIs from files.
1950 GNUNET_FS_PUBLISH_OPTION_SIMULATE_ONLY = 1
1954 * Publish a file or directory.
1956 * @param h handle to the file sharing subsystem
1957 * @param fi information about the file or directory structure to publish
1958 * @param namespace namespace to publish the file in, NULL for no namespace
1959 * @param nid identifier to use for the publishd content in the namespace
1960 * (can be NULL, must be NULL if namespace is NULL)
1961 * @param nuid update-identifier that will be used for future updates
1962 * (can be NULL, must be NULL if namespace or nid is NULL)
1963 * @param options options for the publication
1964 * @return context that can be used to control the publish operation
1966 struct GNUNET_FS_PublishContext *
1967 GNUNET_FS_publish_start (struct GNUNET_FS_Handle *h,
1968 struct GNUNET_FS_FileInformation *fi,
1969 struct GNUNET_FS_Namespace *namespace,
1972 enum GNUNET_FS_PublishOptions options);
1976 * Stop a publication. Will abort incomplete publications (but
1977 * not remove blocks that have already been published) or
1978 * simply clean up the state for completed publications.
1979 * Must NOT be called from within the event callback!
1981 * @param pc context for the publication to stop
1984 GNUNET_FS_publish_stop (struct GNUNET_FS_PublishContext *pc);
1988 * Signature of a function called as the continuation of a KBlock or
1989 * SBlock publication.
1991 * @param cls closure
1992 * @param uri URI under which the block is now available, NULL on error
1993 * @param emsg error message, NULL on success
1995 typedef void (*GNUNET_FS_PublishContinuation)(void *cls,
1996 const struct GNUNET_FS_Uri *uri,
2001 * Publish a KBlock on GNUnet.
2003 * @param h handle to the file sharing subsystem
2004 * @param ksk_uri keywords to use
2005 * @param meta metadata to use
2006 * @param uri URI to refer to in the KBlock
2007 * @param expirationTime when the KBlock expires
2008 * @param anonymity anonymity level for the KBlock
2009 * @param priority priority for the KBlock
2010 * @param cont continuation
2011 * @param cont_cls closure for cont
2014 GNUNET_FS_publish_ksk (struct GNUNET_FS_Handle *h,
2015 const struct GNUNET_FS_Uri *ksk_uri,
2016 const struct GNUNET_CONTAINER_MetaData *meta,
2017 const struct GNUNET_FS_Uri *uri,
2018 struct GNUNET_TIME_Absolute expirationTime,
2021 enum GNUNET_FS_PublishOptions options,
2022 GNUNET_FS_PublishContinuation cont,
2027 * Publish an SBlock on GNUnet.
2029 * @param h handle to the file sharing subsystem
2030 * @param namespace namespace to publish in
2031 * @param identifier identifier to use
2032 * @param update update identifier to use
2033 * @param meta metadata to use
2034 * @param uri URI to refer to in the SBlock
2035 * @param expirationTime when the SBlock expires
2036 * @param anonymity anonymity level for the SBlock
2037 * @param priority priority for the SBlock
2038 * @param cont continuation
2039 * @param cont_cls closure for cont
2042 GNUNET_FS_publish_sks (struct GNUNET_FS_Handle *h,
2043 struct GNUNET_FS_Namespace *namespace,
2044 const char *identifier,
2046 const struct GNUNET_CONTAINER_MetaData *meta,
2047 const struct GNUNET_FS_Uri *uri,
2048 struct GNUNET_TIME_Absolute expirationTime,
2051 enum GNUNET_FS_PublishOptions options,
2052 GNUNET_FS_PublishContinuation cont,
2057 * Type of a function called by "GNUNET_FS_get_indexed_files".
2059 * @param cls closure
2060 * @param filename the name of the file
2061 * @param file_id hash of the contents of the indexed file
2062 * @return GNUNET_OK to continue iteration, GNUNET_SYSERR to abort
2064 typedef int (*GNUNET_FS_IndexedFileProcessor) (void *cls,
2065 const char *filename,
2066 const GNUNET_HashCode *file_id);
2070 * Iterate over all indexed files.
2072 * @param h handle to the file sharing subsystem
2073 * @param iterator function to call on each indexed file
2074 * @param iterator_cls closure for iterator
2075 * @param cont continuation to call when done;
2076 * reason should be "TIMEOUT" (on
2077 * error) or "PREREQ_DONE" (on success)
2078 * @param cont_cls closure for cont
2081 GNUNET_FS_get_indexed_files (struct GNUNET_FS_Handle *h,
2082 GNUNET_FS_IndexedFileProcessor iterator,
2084 GNUNET_SCHEDULER_Task cont,
2091 * @param h handle to the file sharing subsystem
2092 * @param filename file to unindex
2093 * @param cctx initial value for the client context
2094 * @return NULL on error, otherwise handle
2096 struct GNUNET_FS_UnindexContext *
2097 GNUNET_FS_unindex_start (struct GNUNET_FS_Handle *h,
2098 const char *filename,
2103 * Clean up after completion of an unindex operation.
2108 GNUNET_FS_unindex_stop (struct GNUNET_FS_UnindexContext *uc);
2112 * Publish an advertismement for a namespace.
2114 * @param h handle to the file sharing subsystem
2115 * @param ksk_uri keywords to use for advertisment
2116 * @param namespace handle for the namespace that should be advertised
2117 * @param meta meta-data for the namespace advertisement
2118 * @param anonymity for the namespace advertismement
2119 * @param priority for the namespace advertisement
2120 * @param expiration for the namespace advertisement
2121 * @param rootEntry name of the root of the namespace
2122 * @param cont continuation
2123 * @param cont_cls closure for cont
2126 GNUNET_FS_namespace_advertise (struct GNUNET_FS_Handle *h,
2127 struct GNUNET_FS_Uri *ksk_uri,
2128 struct GNUNET_FS_Namespace *namespace,
2129 const struct GNUNET_CONTAINER_MetaData *meta,
2132 struct GNUNET_TIME_Absolute expiration,
2133 const char *rootEntry,
2134 GNUNET_FS_PublishContinuation cont,
2139 * Create a namespace with the given name; if one already
2140 * exists, return a handle to the existing namespace.
2142 * @param h handle to the file sharing subsystem
2143 * @param name name to use for the namespace
2144 * @return handle to the namespace, NULL on error
2146 struct GNUNET_FS_Namespace *
2147 GNUNET_FS_namespace_create (struct GNUNET_FS_Handle *h,
2152 * Delete a namespace handle. Can be used for a clean shutdown (free
2153 * memory) or also to freeze the namespace to prevent further
2154 * insertions by anyone.
2156 * @param namespace handle to the namespace that should be deleted / freed
2157 * @param freeze prevents future insertions; creating a namespace
2158 * with the same name again will create a fresh namespace instead
2160 * @return GNUNET_OK on success, GNUNET_SYSERR on error
2163 GNUNET_FS_namespace_delete (struct GNUNET_FS_Namespace *namespace,
2168 * Callback with information about local (!) namespaces.
2169 * Contains the names of the local namespace and the global
2172 * @param cls closure
2173 * @param name human-readable identifier of the namespace
2174 * @param id hash identifier for the namespace
2176 typedef void (*GNUNET_FS_NamespaceInfoProcessor) (void *cls,
2178 const GNUNET_HashCode *id);
2182 * Build a list of all available local (!) namespaces The returned
2183 * names are only the nicknames since we only iterate over the local
2186 * @param h handle to the file sharing subsystem
2187 * @param cb function to call on each known namespace
2188 * @param cb_cls closure for cb
2191 GNUNET_FS_namespace_list (struct GNUNET_FS_Handle *h,
2192 GNUNET_FS_NamespaceInfoProcessor cb,
2197 * Function called on updateable identifiers.
2199 * @param cls closure
2200 * @param last_id last identifier
2201 * @param last_uri uri used for the content published under the last_id
2202 * @param last_meta metadata associated with last_uri
2203 * @param next_id identifier that should be used for updates
2206 (*GNUNET_FS_IdentifierProcessor)(void *cls,
2207 const char *last_id,
2208 const struct GNUNET_FS_Uri *last_uri,
2209 const struct GNUNET_CONTAINER_MetaData *last_meta,
2210 const char *next_id);
2214 * List all of the identifiers in the namespace for
2215 * which we could produce an update.
2217 * @param namespace namespace to inspect for updateable content
2218 * @param ip function to call on each updateable identifier
2219 * @param ip_cls closure for ip
2222 GNUNET_FS_namespace_list_updateable (struct GNUNET_FS_Namespace *namespace,
2223 GNUNET_FS_IdentifierProcessor ip,
2228 * Options for searching. Compatible options
2229 * can be OR'ed together.
2231 enum GNUNET_FS_SearchOptions
2234 * No options (use defaults for everything).
2236 GNUNET_FS_SEARCH_OPTION_NONE = 0,
2239 * Only search the local host, do not search remote systems (no P2P)
2241 GNUNET_FS_SEARCH_OPTION_LOOPBACK_ONLY = 1
2247 * Start search for content.
2249 * @param h handle to the file sharing subsystem
2250 * @param uri specifies the search parameters; can be
2251 * a KSK URI or an SKS URI.
2252 * @param anonymity desired level of anonymity
2253 * @param options options for the search
2254 * @param cctx initial value for the client context
2255 * @return context that can be used to control the search
2257 struct GNUNET_FS_SearchContext *
2258 GNUNET_FS_search_start (struct GNUNET_FS_Handle *h,
2259 const struct GNUNET_FS_Uri *uri,
2261 enum GNUNET_FS_SearchOptions options,
2268 * @param sc context for the search that should be paused
2271 GNUNET_FS_search_pause (struct GNUNET_FS_SearchContext *sc);
2275 * Continue paused search.
2277 * @param sc context for the search that should be resumed
2280 GNUNET_FS_search_continue (struct GNUNET_FS_SearchContext *sc);
2284 * Stop search for content.
2286 * @param sc context for the search that should be stopped
2289 GNUNET_FS_search_stop (struct GNUNET_FS_SearchContext *sc);
2295 * Options for downloading. Compatible options
2296 * can be OR'ed together.
2298 enum GNUNET_FS_DownloadOptions
2301 * No options (use defaults for everything).
2303 GNUNET_FS_DOWNLOAD_OPTION_NONE = 0,
2306 * Only download from the local host, do not access remote systems (no P2P)
2308 GNUNET_FS_DOWNLOAD_OPTION_LOOPBACK_ONLY = 1,
2311 * Do a recursive download (that is, automatically trigger the
2312 * download of files in directories).
2314 GNUNET_FS_DOWNLOAD_OPTION_RECURSIVE = 2,
2317 * Do not append temporary data to
2318 * the target file (for the IBlocks).
2320 GNUNET_FS_DOWNLOAD_NO_TEMPORARIES = 4,
2323 * Internal option used to flag this download as a 'probe' for a
2324 * search result. Impacts the priority with which the download is
2325 * run and causes signalling callbacks to be done differently.
2326 * Also, probe downloads are not serialized on suspension. Normal
2327 * clients should not use this!
2329 GNUNET_FS_DOWNLOAD_IS_PROBE = (1<<31)
2336 * Download parts of a file. Note that this will store
2337 * the blocks at the respective offset in the given file. Also, the
2338 * download is still using the blocking of the underlying FS
2339 * encoding. As a result, the download may *write* outside of the
2340 * given boundaries (if offset and length do not match the 32k FS
2341 * block boundaries). <p>
2343 * The given range can be used to focus a download towards a
2344 * particular portion of the file (optimization), not to strictly
2345 * limit the download to exactly those bytes.
2347 * @param h handle to the file sharing subsystem
2348 * @param uri the URI of the file (determines what to download); CHK or LOC URI
2349 * @param meta known metadata for the file (can be NULL)
2350 * @param filename where to store the file, maybe NULL (then no file is
2351 * created on disk and data must be grabbed from the callbacks)
2352 * @param tempname where to store temporary file data, not used if filename is non-NULL;
2353 * can be NULL (in which case we will pick a name if needed); the temporary file
2354 * may already exist, in which case we will try to use the data that is there and
2355 * if it is not what is desired, will overwrite it
2356 * @param offset at what offset should we start the download (typically 0)
2357 * @param length how many bytes should be downloaded starting at offset
2358 * @param anonymity anonymity level to use for the download
2359 * @param options various download options
2360 * @param cctx initial value for the client context for this download
2361 * @param parent parent download to associate this download with (use NULL
2362 * for top-level downloads; useful for manually-triggered recursive downloads)
2363 * @return context that can be used to control this download
2365 struct GNUNET_FS_DownloadContext *
2366 GNUNET_FS_download_start (struct GNUNET_FS_Handle *h,
2367 const struct GNUNET_FS_Uri *uri,
2368 const struct GNUNET_CONTAINER_MetaData *meta,
2369 const char *filename,
2370 const char *tempname,
2374 enum GNUNET_FS_DownloadOptions options,
2376 struct GNUNET_FS_DownloadContext *parent);
2380 * Download parts of a file based on a search result. The download
2381 * will be associated with the search result (and the association
2382 * will be preserved when serializing/deserializing the state).
2383 * If the search is stopped, the download will not be aborted but
2384 * be 'promoted' to a stand-alone download.
2386 * As with the other download function, this will store
2387 * the blocks at the respective offset in the given file. Also, the
2388 * download is still using the blocking of the underlying FS
2389 * encoding. As a result, the download may *write* outside of the
2390 * given boundaries (if offset and length do not match the 32k FS
2391 * block boundaries). <p>
2393 * The given range can be used to focus a download towards a
2394 * particular portion of the file (optimization), not to strictly
2395 * limit the download to exactly those bytes.
2397 * @param h handle to the file sharing subsystem
2398 * @param sr the search result to use for the download (determines uri and
2399 * meta data and associations)
2400 * @param filename where to store the file, maybe NULL (then no file is
2401 * created on disk and data must be grabbed from the callbacks)
2402 * @param tempname where to store temporary file data, not used if filename is non-NULL;
2403 * can be NULL (in which case we will pick a name if needed); the temporary file
2404 * may already exist, in which case we will try to use the data that is there and
2405 * if it is not what is desired, will overwrite it
2406 * @param offset at what offset should we start the download (typically 0)
2407 * @param length how many bytes should be downloaded starting at offset
2408 * @param anonymity anonymity level to use for the download
2409 * @param options various download options
2410 * @param cctx initial value for the client context for this download
2411 * @return context that can be used to control this download
2413 struct GNUNET_FS_DownloadContext *
2414 GNUNET_FS_download_start_from_search (struct GNUNET_FS_Handle *h,
2415 struct GNUNET_FS_SearchResult *sr,
2416 const char *filename,
2417 const char *tempname,
2421 enum GNUNET_FS_DownloadOptions options,
2426 * Stop a download (aborts if download is incomplete).
2428 * @param dc handle for the download
2429 * @param do_delete delete files of incomplete downloads
2432 GNUNET_FS_download_stop (struct GNUNET_FS_DownloadContext *dc,
2437 * Initialize collection.
2439 * @param h handle to the file sharing subsystem
2440 * @param namespace namespace to use for the collection
2441 * @return GNUNET_OK on success, GNUNET_SYSERR if another
2442 * namespace is already set for our collection
2445 GNUNET_FS_collection_start (struct GNUNET_FS_Handle *h,
2446 struct GNUNET_FS_Namespace *namespace);
2452 * @param h handle to the file sharing subsystem
2453 * @return GNUNET_OK on success, GNUNET_SYSERR if no collection is active
2456 GNUNET_FS_collection_stop (struct GNUNET_FS_Handle *h);
2460 * Are we using a collection?
2462 * @param h handle to the file sharing subsystem
2463 * @return NULL if there is no collection,
2465 struct GNUNET_FS_Namespace *
2466 GNUNET_FS_collection_get(struct GNUNET_FS_Handle *h);
2470 * Publish an update of the current collection information to the
2471 * network now. The function has no effect if the collection has not
2472 * changed since the last publication. If we are currently not
2473 * collecting, this function does nothing.
2475 * @param h handle to the file sharing subsystem
2477 void GNUNET_FS_collection_publish (struct GNUNET_FS_Handle *h);
2481 * If we are currently building a collection, publish the given file
2482 * information in that collection. If we are currently not
2483 * collecting, this function does nothing.
2485 * @param h handle to the file sharing subsystem
2486 * @param uri uri to add to the collection
2487 * @param meta metadata for the uri
2489 void GNUNET_FS_collection_add (const struct GNUNET_FS_Handle *h,
2490 const struct GNUNET_FS_Uri *uri,
2491 const struct GNUNET_CONTAINER_MetaData *meta);
2497 /* ******************** Directory API *********************** */
2500 #define GNUNET_FS_DIRECTORY_MIME "application/gnunet-directory"
2501 #define GNUNET_FS_DIRECTORY_MAGIC "\211GND\r\n\032\n"
2502 #define GNUNET_FS_DIRECTORY_EXT ".gnd"
2505 * Does the meta-data claim that this is a directory?
2506 * Checks if the mime-type is that of a GNUnet directory.
2508 * @return GNUNET_YES if it is, GNUNET_NO if it is not, GNUNET_SYSERR if
2509 * we have no mime-type information (treat as 'GNUNET_NO')
2512 GNUNET_FS_meta_data_test_for_directory (const struct GNUNET_CONTAINER_MetaData *md);
2516 * Set the MIMETYPE information for the given
2517 * metadata to "application/gnunet-directory".
2519 * @param md metadata to add mimetype to
2522 GNUNET_FS_meta_data_make_directory (struct GNUNET_CONTAINER_MetaData *md);
2526 * Suggest a filename based on given metadata.
2528 * @param md given meta data
2529 * @return NULL if meta data is useless for suggesting a filename
2532 GNUNET_FS_meta_data_suggest_filename (const struct GNUNET_CONTAINER_MetaData *md);
2536 * Function used to process entries in a directory.
2538 * @param cls closure
2539 * @param filename name of the file in the directory
2540 * @param uri URI of the file
2541 * @param metadata metadata for the file; metadata for
2542 * the directory if everything else is NULL/zero
2543 * @param length length of the available data for the file
2544 * (of type size_t since data must certainly fit
2545 * into memory; if files are larger than size_t
2546 * permits, then they will certainly not be
2547 * embedded with the directory itself).
2548 * @param data data available for the file (length bytes)
2550 typedef void (*GNUNET_FS_DirectoryEntryProcessor)(void *cls,
2551 const char *filename,
2552 const struct GNUNET_FS_Uri *uri,
2553 const struct GNUNET_CONTAINER_MetaData *meta,
2559 * Iterate over all entries in a directory. Note that directories
2560 * are structured such that it is possible to iterate over the
2561 * individual blocks as well as over the entire directory. Thus
2562 * a client can call this function on the buffer in the
2563 * GNUNET_FS_ProgressCallback. Also, directories can optionally
2564 * include the contents of (small) files embedded in the directory
2565 * itself; for those files, the processor may be given the
2566 * contents of the file directly by this function.
2568 * @param size number of bytes in data
2569 * @param data pointer to the beginning of the directory
2570 * @param offset offset of data in the directory
2571 * @param dep function to call on each entry
2572 * @param dep_cls closure for dep
2575 GNUNET_FS_directory_list_contents (size_t size,
2578 GNUNET_FS_DirectoryEntryProcessor dep,
2583 * Opaque handle to a directory builder.
2585 struct GNUNET_FS_DirectoryBuilder;
2588 * Create a directory builder.
2590 * @param mdir metadata for the directory
2592 struct GNUNET_FS_DirectoryBuilder *
2593 GNUNET_FS_directory_builder_create (const struct GNUNET_CONTAINER_MetaData *mdir);
2597 * Add an entry to a directory.
2599 * @param bld directory to extend
2600 * @param uri uri of the entry (must not be a KSK)
2601 * @param md metadata of the entry
2602 * @param data raw data of the entry, can be NULL, otherwise
2603 * data must point to exactly the number of bytes specified
2607 GNUNET_FS_directory_builder_add (struct GNUNET_FS_DirectoryBuilder *bld,
2608 const struct GNUNET_FS_Uri *uri,
2609 const struct GNUNET_CONTAINER_MetaData *md,
2614 * Finish building the directory. Frees the
2615 * builder context and returns the directory
2618 * @param bld directory to finish
2619 * @param rsize set to the number of bytes needed
2620 * @param rdata set to the encoded directory
2621 * @return GNUNET_OK on success
2624 GNUNET_FS_directory_builder_finish (struct GNUNET_FS_DirectoryBuilder *bld,
2629 #if 0 /* keep Emacsens' auto-indent happy */