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- /*
- This file is part of GNUnet
- Copyright (C) 2012, 2013 GNUnet e.V.
- GNUnet is free software: you can redistribute it and/or modify it
- under the terms of the GNU Affero General Public License as published
- by the Free Software Foundation, either version 3 of the License,
- or (at your option) any later version.
- GNUnet is distributed in the hope that it will be useful, but
- WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- Affero General Public License for more details.
-
- You should have received a copy of the GNU Affero General Public License
- along with this program. If not, see <http://www.gnu.org/licenses/>.
- SPDX-License-Identifier: AGPL3.0-or-later
- */
- /**
- * @author Maximilian Szengel
- * @author Christian Grothoff
- *
- * @file
- * API to access regex service to advertise capabilities via regex and discover
- * respective peers using matching strings
- *
- * @defgroup regex RegEx service
- * Advertise capabilities via RegEx and discover
- * respective peers using matching strings.
- *
- * @see [Documentation](https://gnunet.org/regex)
- *
- * @{
- */
- #ifndef GNUNET_REGEX_SERVICE_H
- #define GNUNET_REGEX_SERVICE_H
- #include "gnunet_util_lib.h"
- #ifdef __cplusplus
- extern "C"
- {
- #if 0 /* keep Emacsens' auto-indent happy */
- }
- #endif
- #endif
- /**
- * Constant for how many bytes the initial string regex should have.
- */
- #define GNUNET_REGEX_INITIAL_BYTES 24
- /**
- * Handle to store cached data about a regex announce.
- */
- struct GNUNET_REGEX_Announcement;
- /**
- * Handle to store data about a regex search.
- */
- struct GNUNET_REGEX_Search;
- /**
- * Announce this peer under the given regular expression. Does
- * not free resources, must call #GNUNET_REGEX_announce_cancel for
- * that.
- *
- * @param cfg configuration to use
- * @param regex Regular expression to announce.
- * @param refresh_delay after what delay should the announcement be repeated?
- * @param compression How many characters per edge can we squeeze?
- * @return Handle to reuse o free cached resources.
- * Must be freed by calling #GNUNET_REGEX_announce_cancel.
- */
- struct GNUNET_REGEX_Announcement *
- GNUNET_REGEX_announce (const struct GNUNET_CONFIGURATION_Handle *cfg,
- const char *regex,
- struct GNUNET_TIME_Relative refresh_delay,
- uint16_t compression);
- /**
- * Stop announcing the regex specified by the given handle.
- *
- * @param a handle returned by a previous #GNUNET_REGEX_announce call.
- */
- void
- GNUNET_REGEX_announce_cancel (struct GNUNET_REGEX_Announcement *a);
- /**
- * Search callback function, invoked for every result that was found.
- *
- * @param cls Closure provided in #GNUNET_REGEX_search.
- * @param id Peer providing a regex that matches the string.
- * @param get_path Path of the get request.
- * @param get_path_length Lenght of @a get_path.
- * @param put_path Path of the put request.
- * @param put_path_length Length of the @a put_path.
- */
- typedef void
- (*GNUNET_REGEX_Found)(void *cls,
- const struct GNUNET_PeerIdentity *id,
- const struct GNUNET_PeerIdentity *get_path,
- unsigned int get_path_length,
- const struct GNUNET_PeerIdentity *put_path,
- unsigned int put_path_length);
- /**
- * Search for a peer offering a regex matching certain string in the DHT.
- * The search runs until #GNUNET_REGEX_search_cancel is called, even if results
- * are returned.
- *
- * @param cfg configuration to use
- * @param string String to match against the regexes in the DHT.
- * @param callback Callback for found peers.
- * @param callback_cls Closure for @c callback.
- * @return Handle to stop search and free resources.
- * Must be freed by calling #GNUNET_REGEX_search_cancel.
- */
- struct GNUNET_REGEX_Search *
- GNUNET_REGEX_search (const struct GNUNET_CONFIGURATION_Handle *cfg,
- const char *string,
- GNUNET_REGEX_Found callback,
- void *callback_cls);
- /**
- * Stop search and free all data used by a #GNUNET_REGEX_search call.
- *
- * @param s Handle returned by a previous #GNUNET_REGEX_search call.
- */
- void
- GNUNET_REGEX_search_cancel (struct GNUNET_REGEX_Search *s);
- #if 0 /* keep Emacsens' auto-indent happy */
- {
- #endif
- #ifdef __cplusplus
- }
- #endif
- #endif
- /** @} */ /* end of group */
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