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- /* Copyright (c) 2012-2018, The Tor Project, Inc. */
- /* See LICENSE for licensing information */
- /**
- * \file replaycache.h
- * \brief Header file for replaycache.c.
- **/
- #ifndef TOR_REPLAYCACHE_H
- #define TOR_REPLAYCACHE_H
- typedef struct replaycache_t replaycache_t;
- #ifdef REPLAYCACHE_PRIVATE
- struct replaycache_t {
- /* Scrub interval */
- time_t scrub_interval;
- /* Last scrubbed */
- time_t scrubbed;
- /*
- * Horizon
- * (don't return true on digests in the cache but older than this)
- */
- time_t horizon;
- /*
- * Digest map: keys are digests, values are times the digest was last seen
- */
- digest256map_t *digests_seen;
- };
- #endif /* defined(REPLAYCACHE_PRIVATE) */
- /* replaycache_t free/new */
- void replaycache_free_(replaycache_t *r);
- #define replaycache_free(r) \
- FREE_AND_NULL(replaycache_t, replaycache_free_, (r))
- replaycache_t * replaycache_new(time_t horizon, time_t interval);
- #ifdef REPLAYCACHE_PRIVATE
- /*
- * replaycache_t internal functions:
- *
- * These take the time to treat as the present as an argument for easy unit
- * testing. For everything else, use the wrappers below instead.
- */
- STATIC int replaycache_add_and_test_internal(
- time_t present, replaycache_t *r, const void *data, size_t len,
- time_t *elapsed);
- STATIC void replaycache_scrub_if_needed_internal(
- time_t present, replaycache_t *r);
- #endif /* defined(REPLAYCACHE_PRIVATE) */
- /*
- * replaycache_t methods
- */
- int replaycache_add_and_test(replaycache_t *r, const void *data, size_t len);
- int replaycache_add_test_and_elapsed(
- replaycache_t *r, const void *data, size_t len, time_t *elapsed);
- void replaycache_scrub_if_needed(replaycache_t *r);
- #endif /* !defined(TOR_REPLAYCACHE_H) */
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